./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2026668535 <...> Warning: Permanently added '10.128.1.102' (ED25519) to the list of known hosts. execve("./syz-executor2026668535", ["./syz-executor2026668535"], 0x7fff3b201570 /* 10 vars */) = 0 brk(NULL) = 0x5555557ff000 brk(0x5555557ffd00) = 0x5555557ffd00 arch_prctl(ARCH_SET_FS, 0x5555557ff380) = 0 set_tid_address(0x5555557ff650) = 287 set_robust_list(0x5555557ff660, 24) = 0 rseq(0x5555557ffca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2026668535", 4096) = 28 getrandom("\x22\x2b\xc6\x49\x7d\xbe\xcd\x42", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555557ffd00 brk(0x555555820d00) = 0x555555820d00 brk(0x555555821000) = 0x555555821000 mprotect(0x7f35847d6000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 mkdir("./syzkaller.vrTYuW", 0700) = 0 chmod("./syzkaller.vrTYuW", 0777) = 0 chdir("./syzkaller.vrTYuW") = 0 mkdir("./0", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 289 ./strace-static-x86_64: Process 289 attached [pid 289] set_robust_list(0x5555557ff660, 24) = 0 [pid 289] chdir("./0") = 0 [pid 289] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 289] setpgid(0, 0) = 0 [pid 289] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 289] write(3, "1000", 4) = 4 [pid 289] close(3) = 0 [pid 289] symlink("/dev/binderfs", "./binderfs") = 0 [pid 289] write(1, "executing program\n", 18executing program ) = 18 [pid 289] memfd_create("syzkaller", 0) = 3 [pid 289] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 289] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 289] munmap(0x7f357c323000, 138412032) = 0 [pid 289] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 289] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 289] close(3) = 0 [pid 289] close(4) = 0 [pid 289] mkdir("./file1", 0777) = 0 [ 21.516521][ T24] audit: type=1400 audit(1719030920.390:66): avc: denied { execmem } for pid=287 comm="syz-executor202" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.521507][ T24] audit: type=1400 audit(1719030920.390:67): avc: denied { read write } for pid=287 comm="syz-executor202" name="loop0" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.528128][ T24] audit: type=1400 audit(1719030920.390:68): avc: denied { open } for pid=287 comm="syz-executor202" path="/dev/loop0" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.536687][ T24] audit: type=1400 audit(1719030920.390:69): avc: denied { ioctl } for pid=287 comm="syz-executor202" path="/dev/loop0" dev="devtmpfs" ino=111 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.586096][ T24] audit: type=1400 audit(1719030920.460:70): avc: denied { mounton } for pid=289 comm="syz-executor202" path="/root/syzkaller.vrTYuW/0/file1" dev="sda1" ino=1930 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.647703][ T289] EXT4-fs (loop0): Ignoring removed orlov option [ 21.653870][ T289] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 21.676443][ T289] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue [pid 289] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 289] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 289] chdir("./file1") = 0 [pid 289] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 289] ioctl(4, LOOP_CLR_FD) = 0 [pid 289] close(4) = 0 [pid 289] chdir("./file0") = 0 [pid 289] creat("./bus", 000) = 4 [pid 289] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 289] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 289] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 289] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 289] exit_group(0) = ? [pid 289] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=289, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./0/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/binderfs") = 0 umount2("./0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./0/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./0/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./0/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./0/file1/lost+found") = 0 umount2("./0/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./0/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file0/file0") = 0 umount2("./0/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file0/file1") = 0 [ 21.698219][ T24] audit: type=1400 audit(1719030920.570:71): avc: denied { mount } for pid=289 comm="syz-executor202" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 21.720694][ T24] audit: type=1400 audit(1719030920.590:72): avc: denied { write } for pid=289 comm="syz-executor202" name="file0" dev="loop0" ino=12 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 umount2("./0/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./0/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 [ 21.743898][ T24] audit: type=1400 audit(1719030920.590:73): avc: denied { add_name } for pid=289 comm="syz-executor202" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 21.765362][ T24] audit: type=1400 audit(1719030920.590:74): avc: denied { create } for pid=289 comm="syz-executor202" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 21.767563][ T287] ================================================================== [ 21.786213][ T24] audit: type=1400 audit(1719030920.590:75): avc: denied { write open } for pid=289 comm="syz-executor202" path="/root/syzkaller.vrTYuW/0/file1/file0/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 21.794510][ T287] BUG: KASAN: use-after-free in ext4_xattr_delete_inode+0xc67/0xc80 [ 21.828056][ T287] Read of size 4 at addr ffff88811f0f7000 by task syz-executor202/287 [ 21.836120][ T287] [ 21.838299][ T287] CPU: 1 PID: 287 Comm: syz-executor202 Not tainted 5.10.215-syzkaller-00370-gb58b8f9dad93 #0 [ 21.848996][ T287] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 21.858961][ T287] Call Trace: [ 21.862207][ T287] dump_stack_lvl+0x1e2/0x24b [ 21.866714][ T287] ? bfq_pos_tree_add_move+0x43b/0x43b [ 21.872180][ T287] ? panic+0x812/0x812 [ 21.876101][ T287] ? ext4_mark_iloc_dirty+0x2c23/0x3e60 [ 21.881489][ T287] print_address_description+0x81/0x3b0 [ 21.887296][ T287] kasan_report+0x179/0x1c0 [ 21.891647][ T287] ? __ext4_journal_ensure_credits+0x470/0x470 [ 21.897624][ T287] ? ext4_xattr_delete_inode+0xc67/0xc80 [ 21.903101][ T287] ? ext4_xattr_delete_inode+0xc67/0xc80 [ 21.908552][ T287] __asan_report_load4_noabort+0x14/0x20 [ 21.914044][ T287] ext4_xattr_delete_inode+0xc67/0xc80 [ 21.919417][ T287] ? sb_end_intwrite+0x110/0x110 [ 21.924350][ T287] ? ext4_expand_extra_isize_ea+0x1bb0/0x1bb0 [ 21.930343][ T287] ? __kasan_check_read+0x11/0x20 [ 21.935442][ T287] ext4_evict_inode+0x1095/0x1730 [ 21.940545][ T287] ? ext4_inode_is_fast_symlink+0x360/0x360 [ 21.946601][ T287] ? inode_io_list_del_locked+0x1ad/0x210 [ 21.952236][ T287] ? _raw_spin_unlock+0x4d/0x70 [ 21.957880][ T287] ? ext4_inode_is_fast_symlink+0x360/0x360 [ 21.963915][ T287] evict+0x2a3/0x6c0 [ 21.967645][ T287] iput+0x632/0x7e0 [ 21.971277][ T287] vfs_rmdir+0x271/0x3f0 [ 21.975358][ T287] do_rmdir+0x2cf/0x5c0 [ 21.979522][ T287] ? d_delete_notify+0xd0/0xd0 [ 21.984132][ T287] ? strncpy_from_user+0x18e/0x2d0 [ 21.989244][ T287] ? getname_flags+0x1fd/0x520 [ 21.994033][ T287] __x64_sys_rmdir+0x49/0x50 [ 21.998940][ T287] do_syscall_64+0x34/0x70 [ 22.003188][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 22.009173][ T287] RIP: 0033:0x7f3584761dc7 [ 22.013506][ T287] Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 54 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 22.033475][ T287] RSP: 002b:00007ffffebc6ce8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 [ 22.041820][ T287] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3584761dc7 [ 22.049695][ T287] RDX: 0000000000008890 RSI: 0000000000000000 RDI: 00007ffffebc7e90 [ 22.057685][ T287] RBP: 0000000000000065 R08: 0000000000000000 R09: 0000000000000000 [ 22.065487][ T287] R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffffebc7e90 [ 22.073559][ T287] R13: 0000555555810740 R14: 431bde82d7b634db R15: 00007ffffebca010 [ 22.081371][ T287] [ 22.083540][ T287] Allocated by task 288: [ 22.087627][ T287] ____kasan_kmalloc+0xdb/0x110 [ 22.092308][ T287] __kasan_kmalloc+0x9/0x10 [ 22.096652][ T287] __kmalloc+0x1aa/0x330 [ 22.100827][ T287] kvmalloc_node+0x82/0x130 [ 22.105533][ T287] setxattr+0x204/0x3f0 [ 22.109972][ T287] path_setxattr+0x169/0x240 [ 22.114497][ T287] __x64_sys_lsetxattr+0xc2/0xe0 [ 22.119271][ T287] do_syscall_64+0x34/0x70 [ 22.123528][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 22.129248][ T287] [ 22.131416][ T287] Freed by task 288: [ 22.135849][ T287] kasan_set_track+0x4b/0x70 [ 22.140277][ T287] kasan_set_free_info+0x23/0x40 [ 22.145141][ T287] ____kasan_slab_free+0x121/0x160 [ 22.150086][ T287] __kasan_slab_free+0x11/0x20 [ 22.154686][ T287] slab_free_freelist_hook+0xc0/0x190 [ 22.159896][ T287] kfree+0xc3/0x270 [ 22.163539][ T287] kvfree+0x35/0x40 [ 22.167185][ T287] setxattr+0x28f/0x3f0 [ 22.171353][ T287] path_setxattr+0x169/0x240 [ 22.175953][ T287] __x64_sys_lsetxattr+0xc2/0xe0 [ 22.180726][ T287] do_syscall_64+0x34/0x70 [ 22.185067][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 22.191059][ T287] [ 22.193223][ T287] The buggy address belongs to the object at ffff88811f0f7000 [ 22.193223][ T287] which belongs to the cache kmalloc-32 of size 32 [ 22.206948][ T287] The buggy address is located 0 bytes inside of [ 22.206948][ T287] 32-byte region [ffff88811f0f7000, ffff88811f0f7020) [ 22.219878][ T287] The buggy address belongs to the page: [ 22.225351][ T287] page:ffffea00047c3dc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11f0f7 [ 22.235407][ T287] flags: 0x4000000000000200(slab) [ 22.240271][ T287] raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100043980 [ 22.248688][ T287] raw: 0000000000000000 0000000000400040 00000001ffffffff 0000000000000000 [ 22.257099][ T287] page dumped because: kasan: bad access detected [ 22.263450][ T287] page_owner tracks the page as allocated [ 22.268999][ T287] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 288, ts 21647472351, free_ts 0 [ 22.284278][ T287] prep_new_page+0x166/0x180 [ 22.289069][ T287] get_page_from_freelist+0x2d8c/0x2f30 [ 22.294445][ T287] __alloc_pages_nodemask+0x435/0xaf0 [ 22.299816][ T287] new_slab+0x80/0x400 [ 22.304607][ T287] ___slab_alloc+0x302/0x4b0 [ 22.309031][ T287] __slab_alloc+0x63/0xa0 [ 22.313197][ T287] __kmalloc+0x204/0x330 [ 22.317281][ T287] kvmalloc_node+0x82/0x130 [ 22.321616][ T287] setxattr+0x204/0x3f0 [ 22.325609][ T287] path_setxattr+0x169/0x240 [ 22.330035][ T287] __x64_sys_lsetxattr+0xc2/0xe0 [ 22.334810][ T287] do_syscall_64+0x34/0x70 [ 22.339062][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 22.344959][ T287] page_owner free stack trace missing [ 22.350173][ T287] [ 22.352341][ T287] Memory state around the buggy address: [ 22.357897][ T287] ffff88811f0f6f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 22.365903][ T287] ffff88811f0f6f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 22.374068][ T287] >ffff88811f0f7000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.382160][ T287] ^ [ 22.386039][ T287] ffff88811f0f7080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc close(5) = 0 rmdir("./0/file1/file0") = 0 umount2("./0/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file1") = 0 umount2("./0/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file2") = 0 umount2("./0/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file3") = 0 umount2("./0/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./0/file1") = -1 EBUSY (Device or resource busy) umount2("./0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./0/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./0") = 0 mkdir("./1", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 295 ./strace-static-x86_64: Process 295 attached [pid 295] set_robust_list(0x5555557ff660, 24) = 0 [pid 295] chdir("./1") = 0 [pid 295] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 295] setpgid(0, 0) = 0 [pid 295] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 295] write(3, "1000", 4) = 4 [pid 295] close(3) = 0 [pid 295] symlink("/dev/binderfs", "./binderfs") = 0 [pid 295] write(1, "executing program\n", 18) = 18 [pid 295] memfd_create("syzkaller", 0) = 3 [pid 295] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 295] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 295] munmap(0x7f357c323000, 138412032) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 295] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 295] close(3) = 0 [ 22.394195][ T287] ffff88811f0f7100: fa fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc [ 22.402181][ T287] ================================================================== [ 22.410248][ T287] Disabling lock debugging due to kernel taint [pid 295] close(4) = 0 [pid 295] mkdir("./file1", 0777) = 0 [pid 295] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 295] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 295] chdir("./file1") = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 295] ioctl(4, LOOP_CLR_FD) = 0 [pid 295] close(4) = 0 [pid 295] chdir("./file0") = 0 [pid 295] creat("./bus", 000) = 4 [pid 295] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 295] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 295] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 295] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 295] exit_group(0) = ? [pid 295] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=295, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./1/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/binderfs") = 0 umount2("./1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./1/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./1/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./1/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./1/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./1/file1/lost+found") = 0 umount2("./1/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./1/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./1/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file0/file0") = 0 umount2("./1/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file0/file1") = 0 umount2("./1/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./1/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./1/file1/file0") = 0 umount2("./1/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file1") = 0 umount2("./1/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file2") = 0 umount2("./1/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file3") = 0 umount2("./1/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./1/file1") = -1 EBUSY (Device or resource busy) [ 22.517633][ T295] EXT4-fs (loop0): Ignoring removed orlov option [ 22.523884][ T295] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 22.536111][ T295] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./1/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./1") = 0 mkdir("./2", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 299 ./strace-static-x86_64: Process 299 attached [pid 299] set_robust_list(0x5555557ff660, 24) = 0 [pid 299] chdir("./2") = 0 [pid 299] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 299] setpgid(0, 0) = 0 [pid 299] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 299] write(3, "1000", 4) = 4 [pid 299] close(3) = 0 [pid 299] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 299] write(1, "executing program\n", 18) = 18 [pid 299] memfd_create("syzkaller", 0) = 3 [pid 299] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 299] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 299] munmap(0x7f357c323000, 138412032) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 299] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 299] close(3) = 0 [pid 299] close(4) = 0 [pid 299] mkdir("./file1", 0777) = 0 [pid 299] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 299] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 299] chdir("./file1") = 0 [pid 299] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 299] ioctl(4, LOOP_CLR_FD) = 0 [pid 299] close(4) = 0 [pid 299] chdir("./file0") = 0 [pid 299] creat("./bus", 000) = 4 [pid 299] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 299] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 299] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 299] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 299] exit_group(0) = ? [pid 299] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=299, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- umount2("./2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./2/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/binderfs") = 0 umount2("./2/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./2/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./2/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./2/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./2/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./2/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./2/file1/lost+found") = 0 umount2("./2/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./2/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./2/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file0/file0") = 0 umount2("./2/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file0/file1") = 0 umount2("./2/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./2/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./2/file1/file0") = 0 umount2("./2/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file1") = 0 umount2("./2/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file2") = 0 umount2("./2/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file3") = 0 umount2("./2/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./2/file1") = -1 EBUSY (Device or resource busy) [ 22.707226][ T299] EXT4-fs (loop0): Ignoring removed orlov option [ 22.713645][ T299] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 22.725967][ T299] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./2/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./2/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./2") = 0 mkdir("./3", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 303 ./strace-static-x86_64: Process 303 attached [pid 303] set_robust_list(0x5555557ff660, 24) = 0 [pid 303] chdir("./3") = 0 [pid 303] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 303] setpgid(0, 0) = 0 [pid 303] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 303] write(3, "1000", 4) = 4 [pid 303] close(3) = 0 [pid 303] symlink("/dev/binderfs", "./binderfs") = 0 [pid 303] write(1, "executing program\n", 18) = 18 [pid 303] memfd_create("syzkaller", 0) = 3 [pid 303] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 303] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 303] munmap(0x7f357c323000, 138412032) = 0 [pid 303] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 303] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 303] close(3) = 0 [pid 303] close(4) = 0 [pid 303] mkdir("./file1", 0777) = 0 [pid 303] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 303] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 303] chdir("./file1") = 0 [pid 303] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 303] ioctl(4, LOOP_CLR_FD) = 0 [pid 303] close(4) = 0 [pid 303] chdir("./file0") = 0 [pid 303] creat("./bus", 000) = 4 [pid 303] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 303] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 303] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 303] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 303] exit_group(0) = ? [pid 303] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=303, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./3/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/binderfs") = 0 umount2("./3/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./3/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./3/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./3/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./3/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./3/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./3/file1/lost+found") = 0 umount2("./3/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./3/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./3/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file0/file0") = 0 umount2("./3/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file0/file1") = 0 umount2("./3/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./3/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./3/file1/file0") = 0 umount2("./3/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file1") = 0 umount2("./3/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file2") = 0 umount2("./3/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file3") = 0 umount2("./3/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./3/file1") = -1 EBUSY (Device or resource busy) [ 22.875975][ T303] EXT4-fs (loop0): Ignoring removed orlov option [ 22.882239][ T303] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 22.895917][ T303] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./3/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./3/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./3") = 0 mkdir("./4", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FDexecuting program ) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 307 ./strace-static-x86_64: Process 307 attached [pid 307] set_robust_list(0x5555557ff660, 24) = 0 [pid 307] chdir("./4") = 0 [pid 307] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 307] setpgid(0, 0) = 0 [pid 307] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 307] write(3, "1000", 4) = 4 [pid 307] close(3) = 0 [pid 307] symlink("/dev/binderfs", "./binderfs") = 0 [pid 307] write(1, "executing program\n", 18) = 18 [pid 307] memfd_create("syzkaller", 0) = 3 [pid 307] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 307] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 307] munmap(0x7f357c323000, 138412032) = 0 [pid 307] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 307] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 307] close(3) = 0 [pid 307] close(4) = 0 [pid 307] mkdir("./file1", 0777) = 0 [pid 307] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 307] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 307] chdir("./file1") = 0 [pid 307] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 307] ioctl(4, LOOP_CLR_FD) = 0 [pid 307] close(4) = 0 [pid 307] chdir("./file0") = 0 [pid 307] creat("./bus", 000) = 4 [pid 307] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 307] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 307] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 307] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 307] exit_group(0) = ? [pid 307] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=307, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./4", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./4/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/binderfs") = 0 umount2("./4/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./4/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./4/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./4/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./4/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./4/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./4/file1/lost+found") = 0 umount2("./4/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./4/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./4/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file0/file0") = 0 umount2("./4/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file0/file1") = 0 umount2("./4/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./4/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./4/file1/file0") = 0 umount2("./4/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file1") = 0 umount2("./4/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file2") = 0 umount2("./4/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file3") = 0 umount2("./4/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./4/file1") = -1 EBUSY (Device or resource busy) [ 22.998569][ T307] EXT4-fs (loop0): Ignoring removed orlov option [ 23.004731][ T307] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.016112][ T307] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./4/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./4/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./4") = 0 mkdir("./5", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 311 ./strace-static-x86_64: Process 311 attached [pid 311] set_robust_list(0x5555557ff660, 24) = 0 [pid 311] chdir("./5") = 0 [pid 311] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 311] setpgid(0, 0) = 0 [pid 311] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 311] write(3, "1000", 4) = 4 [pid 311] close(3) = 0 [pid 311] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 311] write(1, "executing program\n", 18) = 18 [pid 311] memfd_create("syzkaller", 0) = 3 [pid 311] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 311] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 311] munmap(0x7f357c323000, 138412032) = 0 [pid 311] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 311] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 311] close(3) = 0 [pid 311] close(4) = 0 [pid 311] mkdir("./file1", 0777) = 0 [pid 311] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 311] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 311] chdir("./file1") = 0 [pid 311] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 311] ioctl(4, LOOP_CLR_FD) = 0 [pid 311] close(4) = 0 [pid 311] chdir("./file0") = 0 [pid 311] creat("./bus", 000) = 4 [pid 311] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 311] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 311] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 311] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 311] exit_group(0) = ? [pid 311] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=311, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./5", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./5/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/binderfs") = 0 umount2("./5/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./5/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./5/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./5/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./5/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./5/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./5/file1/lost+found") = 0 umount2("./5/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./5/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./5/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file0/file0") = 0 umount2("./5/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file0/file1") = 0 umount2("./5/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./5/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./5/file1/file0") = 0 umount2("./5/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file1") = 0 umount2("./5/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file2") = 0 umount2("./5/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file3") = 0 umount2("./5/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./5/file1") = -1 EBUSY (Device or resource busy) [ 23.214966][ T311] EXT4-fs (loop0): Ignoring removed orlov option [ 23.221109][ T311] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.236017][ T311] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./5/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./5/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./5") = 0 mkdir("./6", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 315 ./strace-static-x86_64: Process 315 attached [pid 315] set_robust_list(0x5555557ff660, 24) = 0 [pid 315] chdir("./6") = 0 [pid 315] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 315] setpgid(0, 0) = 0 [pid 315] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 315] write(3, "1000", 4) = 4 [pid 315] close(3) = 0 [pid 315] symlink("/dev/binderfs", "./binderfs") = 0 [pid 315] write(1, "executing program\n", 18) = 18 [pid 315] memfd_create("syzkaller", 0) = 3 [pid 315] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 315] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 315] munmap(0x7f357c323000, 138412032) = 0 [pid 315] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 315] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 315] close(3) = 0 [pid 315] close(4) = 0 [pid 315] mkdir("./file1", 0777) = 0 [pid 315] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 315] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 315] chdir("./file1") = 0 [pid 315] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 315] ioctl(4, LOOP_CLR_FD) = 0 [pid 315] close(4) = 0 [pid 315] chdir("./file0") = 0 [pid 315] creat("./bus", 000) = 4 [pid 315] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 315] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 315] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 315] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 315] exit_group(0) = ? [pid 315] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=315, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./6", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./6/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/binderfs") = 0 umount2("./6/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./6/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./6/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./6/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./6/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./6/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./6/file1/lost+found") = 0 umount2("./6/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./6/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./6/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file0/file0") = 0 umount2("./6/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file0/file1") = 0 umount2("./6/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./6/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./6/file1/file0") = 0 umount2("./6/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file1") = 0 umount2("./6/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file2") = 0 umount2("./6/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file3") = 0 umount2("./6/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./6/file1") = -1 EBUSY (Device or resource busy) [ 23.358673][ T315] EXT4-fs (loop0): Ignoring removed orlov option [ 23.364867][ T315] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.376171][ T315] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./6/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./6/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./6") = 0 mkdir("./7", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 320 ./strace-static-x86_64: Process 320 attached [pid 320] set_robust_list(0x5555557ff660, 24) = 0 [pid 320] chdir("./7") = 0 [pid 320] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 320] setpgid(0, 0) = 0 [pid 320] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 320] write(3, "1000", 4) = 4 [pid 320] close(3) = 0 [pid 320] symlink("/dev/binderfs", "./binderfs") = 0 [pid 320] write(1, "executing program\n", 18) = 18 [pid 320] memfd_create("syzkaller", 0) = 3 [pid 320] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 320] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 320] munmap(0x7f357c323000, 138412032) = 0 [pid 320] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 320] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 320] close(3) = 0 [pid 320] close(4) = 0 [pid 320] mkdir("./file1", 0777) = 0 [pid 320] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 320] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 320] chdir("./file1") = 0 [pid 320] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 320] ioctl(4, LOOP_CLR_FD) = 0 [pid 320] close(4) = 0 [pid 320] chdir("./file0") = 0 [pid 320] creat("./bus", 000) = 4 [pid 320] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 320] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 320] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 320] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 320] exit_group(0) = ? [pid 320] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=320, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./7", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./7/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/binderfs") = 0 umount2("./7/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./7/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./7/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./7/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./7/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./7/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./7/file1/lost+found") = 0 umount2("./7/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./7/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./7/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file0/file0") = 0 umount2("./7/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file0/file1") = 0 umount2("./7/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./7/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./7/file1/file0") = 0 umount2("./7/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file1") = 0 umount2("./7/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file2") = 0 umount2("./7/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file3") = 0 umount2("./7/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./7/file1") = -1 EBUSY (Device or resource busy) [ 23.517443][ T320] EXT4-fs (loop0): Ignoring removed orlov option [ 23.524248][ T320] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.535992][ T320] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./7/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./7/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./7") = 0 mkdir("./8", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 324 ./strace-static-x86_64: Process 324 attached [pid 324] set_robust_list(0x5555557ff660, 24) = 0 [pid 324] chdir("./8") = 0 [pid 324] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 324] setpgid(0, 0) = 0 [pid 324] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 324] write(3, "1000", 4) = 4 [pid 324] close(3) = 0 [pid 324] symlink("/dev/binderfs", "./binderfs") = 0 [pid 324] write(1, "executing program\n", 18executing program ) = 18 [pid 324] memfd_create("syzkaller", 0) = 3 [pid 324] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 324] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 324] munmap(0x7f357c323000, 138412032) = 0 [pid 324] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 324] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 324] close(3) = 0 [pid 324] close(4) = 0 [pid 324] mkdir("./file1", 0777) = 0 [pid 324] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 324] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 324] chdir("./file1") = 0 [pid 324] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 324] ioctl(4, LOOP_CLR_FD) = 0 [pid 324] close(4) = 0 [pid 324] chdir("./file0") = 0 [pid 324] creat("./bus", 000) = 4 [pid 324] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 324] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 324] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 324] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 324] exit_group(0) = ? [pid 324] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=324, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./8", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./8/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/binderfs") = 0 umount2("./8/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./8/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./8/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./8/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./8/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./8/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./8/file1/lost+found") = 0 umount2("./8/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./8/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./8/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file0/file0") = 0 umount2("./8/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file0/file1") = 0 umount2("./8/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./8/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./8/file1/file0") = 0 umount2("./8/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file1") = 0 umount2("./8/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file2") = 0 umount2("./8/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file3") = 0 umount2("./8/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./8/file1") = -1 EBUSY (Device or resource busy) [ 23.717331][ T324] EXT4-fs (loop0): Ignoring removed orlov option [ 23.723610][ T324] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.735812][ T324] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./8/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./8/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./8") = 0 mkdir("./9", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 executing program ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 328 ./strace-static-x86_64: Process 328 attached [pid 328] set_robust_list(0x5555557ff660, 24) = 0 [pid 328] chdir("./9") = 0 [pid 328] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 328] setpgid(0, 0) = 0 [pid 328] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 328] write(3, "1000", 4) = 4 [pid 328] close(3) = 0 [pid 328] symlink("/dev/binderfs", "./binderfs") = 0 [pid 328] write(1, "executing program\n", 18) = 18 [pid 328] memfd_create("syzkaller", 0) = 3 [pid 328] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 328] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 328] munmap(0x7f357c323000, 138412032) = 0 [pid 328] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 328] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 328] close(3) = 0 [pid 328] close(4) = 0 [pid 328] mkdir("./file1", 0777) = 0 [pid 328] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 328] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 328] chdir("./file1") = 0 [pid 328] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 328] ioctl(4, LOOP_CLR_FD) = 0 [pid 328] close(4) = 0 [pid 328] chdir("./file0") = 0 [pid 328] creat("./bus", 000) = 4 [pid 328] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 328] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 328] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 328] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 328] exit_group(0) = ? [pid 328] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=328, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./9", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./9/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/binderfs") = 0 umount2("./9/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./9/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./9/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./9/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./9/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./9/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./9/file1/lost+found") = 0 umount2("./9/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./9/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./9/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file0/file0") = 0 umount2("./9/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file0/file1") = 0 umount2("./9/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./9/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./9/file1/file0") = 0 umount2("./9/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file1") = 0 umount2("./9/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file2") = 0 umount2("./9/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file3") = 0 umount2("./9/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./9/file1") = -1 EBUSY (Device or resource busy) [ 23.935334][ T328] EXT4-fs (loop0): Ignoring removed orlov option [ 23.941517][ T328] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 23.956068][ T328] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./9/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./9/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./9") = 0 mkdir("./10", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 332 ./strace-static-x86_64: Process 332 attached [pid 332] set_robust_list(0x5555557ff660, 24) = 0 [pid 332] chdir("./10") = 0 [pid 332] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 332] setpgid(0, 0) = 0 [pid 332] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 332] write(3, "1000", 4) = 4 [pid 332] close(3) = 0 [pid 332] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 332] write(1, "executing program\n", 18) = 18 [pid 332] memfd_create("syzkaller", 0) = 3 [pid 332] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 332] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 332] munmap(0x7f357c323000, 138412032) = 0 [pid 332] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 332] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 332] close(3) = 0 [pid 332] close(4) = 0 [pid 332] mkdir("./file1", 0777) = 0 [pid 332] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 332] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 332] chdir("./file1") = 0 [pid 332] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 332] ioctl(4, LOOP_CLR_FD) = 0 [pid 332] close(4) = 0 [pid 332] chdir("./file0") = 0 [pid 332] creat("./bus", 000) = 4 [pid 332] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 332] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 332] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 332] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 332] exit_group(0) = ? [pid 332] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=332, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./10", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./10/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/binderfs") = 0 umount2("./10/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./10/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./10/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./10/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./10/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./10/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./10/file1/lost+found") = 0 umount2("./10/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./10/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./10/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file0/file0") = 0 umount2("./10/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file0/file1") = 0 umount2("./10/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./10/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./10/file1/file0") = 0 umount2("./10/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file1") = 0 umount2("./10/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file2") = 0 umount2("./10/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file3") = 0 umount2("./10/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./10/file1") = -1 EBUSY (Device or resource busy) [ 24.117825][ T332] EXT4-fs (loop0): Ignoring removed orlov option [ 24.123981][ T332] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.135835][ T332] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./10/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./10/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./10") = 0 mkdir("./11", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWRexecuting program ) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 336 ./strace-static-x86_64: Process 336 attached [pid 336] set_robust_list(0x5555557ff660, 24) = 0 [pid 336] chdir("./11") = 0 [pid 336] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 336] setpgid(0, 0) = 0 [pid 336] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 336] write(3, "1000", 4) = 4 [pid 336] close(3) = 0 [pid 336] symlink("/dev/binderfs", "./binderfs") = 0 [pid 336] write(1, "executing program\n", 18) = 18 [pid 336] memfd_create("syzkaller", 0) = 3 [pid 336] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 336] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 336] munmap(0x7f357c323000, 138412032) = 0 [pid 336] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 336] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 336] close(3) = 0 [pid 336] close(4) = 0 [pid 336] mkdir("./file1", 0777) = 0 [pid 336] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 336] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 336] chdir("./file1") = 0 [pid 336] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 336] ioctl(4, LOOP_CLR_FD) = 0 [pid 336] close(4) = 0 [pid 336] chdir("./file0") = 0 [pid 336] creat("./bus", 000) = 4 [pid 336] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 336] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 336] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 336] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 336] exit_group(0) = ? [pid 336] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=336, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./11", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./11/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/binderfs") = 0 umount2("./11/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./11/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./11/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./11/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./11/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./11/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./11/file1/lost+found") = 0 umount2("./11/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./11/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./11/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file0/file0") = 0 umount2("./11/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file0/file1") = 0 umount2("./11/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./11/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./11/file1/file0") = 0 umount2("./11/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file1") = 0 umount2("./11/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file2") = 0 umount2("./11/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file3") = 0 umount2("./11/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./11/file1") = -1 EBUSY (Device or resource busy) [ 24.365325][ T336] EXT4-fs (loop0): Ignoring removed orlov option [ 24.371573][ T336] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.386154][ T336] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./11/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./11/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./11") = 0 mkdir("./12", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 341 ./strace-static-x86_64: Process 341 attached [pid 341] set_robust_list(0x5555557ff660, 24) = 0 [pid 341] chdir("./12") = 0 [pid 341] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 341] setpgid(0, 0) = 0 [pid 341] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 341] write(3, "1000", 4) = 4 [pid 341] close(3) = 0 [pid 341] symlink("/dev/binderfs", "./binderfs") = 0 [pid 341] write(1, "executing program\n", 18) = 18 [pid 341] memfd_create("syzkaller", 0) = 3 [pid 341] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 341] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 341] munmap(0x7f357c323000, 138412032) = 0 [pid 341] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 341] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 341] close(3) = 0 [pid 341] close(4) = 0 [pid 341] mkdir("./file1", 0777) = 0 [pid 341] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 341] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 341] chdir("./file1") = 0 [pid 341] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 341] ioctl(4, LOOP_CLR_FD) = 0 [pid 341] close(4) = 0 [pid 341] chdir("./file0") = 0 [pid 341] creat("./bus", 000) = 4 [pid 341] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 341] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 341] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 341] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 341] exit_group(0) = ? [pid 341] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=341, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./12", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./12/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/binderfs") = 0 umount2("./12/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./12/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./12/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./12/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./12/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./12/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./12/file1/lost+found") = 0 umount2("./12/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./12/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./12/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file0/file0") = 0 umount2("./12/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file0/file1") = 0 umount2("./12/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./12/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./12/file1/file0") = 0 umount2("./12/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file1") = 0 umount2("./12/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file2") = 0 umount2("./12/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file3") = 0 umount2("./12/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./12/file1") = -1 EBUSY (Device or resource busy) [ 24.516048][ T341] EXT4-fs (loop0): Ignoring removed orlov option [ 24.522328][ T341] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.535991][ T341] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./12/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./12/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./12") = 0 mkdir("./13", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 345 attached , child_tidptr=0x5555557ff650) = 345 [pid 345] set_robust_list(0x5555557ff660, 24) = 0 [pid 345] chdir("./13") = 0 [pid 345] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 345] setpgid(0, 0) = 0 [pid 345] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 345] write(3, "1000", 4) = 4 [pid 345] close(3) = 0 [pid 345] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 345] write(1, "executing program\n", 18) = 18 [pid 345] memfd_create("syzkaller", 0) = 3 [pid 345] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 345] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 345] munmap(0x7f357c323000, 138412032) = 0 [pid 345] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 345] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 345] close(3) = 0 [pid 345] close(4) = 0 [pid 345] mkdir("./file1", 0777) = 0 [pid 345] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 345] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 345] chdir("./file1") = 0 [pid 345] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 345] ioctl(4, LOOP_CLR_FD) = 0 [pid 345] close(4) = 0 [pid 345] chdir("./file0") = 0 [pid 345] creat("./bus", 000) = 4 [pid 345] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 345] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 345] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 345] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 345] exit_group(0) = ? [pid 345] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=345, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./13", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./13/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/binderfs") = 0 umount2("./13/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./13/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./13/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./13/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./13/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./13/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./13/file1/lost+found") = 0 umount2("./13/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./13/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./13/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file0/file0") = 0 umount2("./13/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file0/file1") = 0 umount2("./13/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./13/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./13/file1/file0") = 0 umount2("./13/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file1") = 0 umount2("./13/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file2") = 0 umount2("./13/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file3") = 0 umount2("./13/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./13/file1") = -1 EBUSY (Device or resource busy) [ 24.727384][ T345] EXT4-fs (loop0): Ignoring removed orlov option [ 24.733556][ T345] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.746168][ T345] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./13/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./13/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./13") = 0 mkdir("./14", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 349 ./strace-static-x86_64: Process 349 attached [pid 349] set_robust_list(0x5555557ff660, 24) = 0 [pid 349] chdir("./14"executing program ) = 0 [pid 349] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 349] setpgid(0, 0) = 0 [pid 349] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 349] write(3, "1000", 4) = 4 [pid 349] close(3) = 0 [pid 349] symlink("/dev/binderfs", "./binderfs") = 0 [pid 349] write(1, "executing program\n", 18) = 18 [pid 349] memfd_create("syzkaller", 0) = 3 [pid 349] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 349] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 349] munmap(0x7f357c323000, 138412032) = 0 [pid 349] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 349] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 349] close(3) = 0 [pid 349] close(4) = 0 [pid 349] mkdir("./file1", 0777) = 0 [pid 349] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 349] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 349] chdir("./file1") = 0 [pid 349] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 349] ioctl(4, LOOP_CLR_FD) = 0 [pid 349] close(4) = 0 [pid 349] chdir("./file0") = 0 [pid 349] creat("./bus", 000) = 4 [pid 349] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 349] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 349] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 349] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 349] exit_group(0) = ? [pid 349] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=349, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./14", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./14/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/binderfs") = 0 umount2("./14/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./14/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./14/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./14/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./14/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./14/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./14/file1/lost+found") = 0 umount2("./14/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./14/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./14/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file0/file0") = 0 umount2("./14/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file0/file1") = 0 umount2("./14/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./14/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./14/file1/file0") = 0 umount2("./14/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file1") = 0 umount2("./14/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file2") = 0 umount2("./14/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file3") = 0 umount2("./14/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./14/file1") = -1 EBUSY (Device or resource busy) [ 24.917363][ T349] EXT4-fs (loop0): Ignoring removed orlov option [ 24.923551][ T349] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 24.935960][ T349] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./14/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./14/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./14") = 0 mkdir("./15", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 353 ./strace-static-x86_64: Process 353 attached [pid 353] set_robust_list(0x5555557ff660, 24) = 0 [pid 353] chdir("./15") = 0 [pid 353] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 353] setpgid(0, 0) = 0 [pid 353] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 353] write(3, "1000", 4) = 4 [pid 353] close(3) = 0 [pid 353] symlink("/dev/binderfs", "./binderfs") = 0 [pid 353] write(1, "executing program\n", 18executing program ) = 18 [pid 353] memfd_create("syzkaller", 0) = 3 [pid 353] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 353] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 353] munmap(0x7f357c323000, 138412032) = 0 [pid 353] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 353] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 353] close(3) = 0 [pid 353] close(4) = 0 [pid 353] mkdir("./file1", 0777) = 0 [pid 353] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 353] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 353] chdir("./file1") = 0 [pid 353] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 353] ioctl(4, LOOP_CLR_FD) = 0 [pid 353] close(4) = 0 [pid 353] chdir("./file0") = 0 [pid 353] creat("./bus", 000) = 4 [pid 353] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 353] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 353] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 353] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 353] exit_group(0) = ? [pid 353] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=353, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./15", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./15/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/binderfs") = 0 umount2("./15/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./15/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./15/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./15/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./15/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./15/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./15/file1/lost+found") = 0 umount2("./15/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./15/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./15/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file0/file0") = 0 umount2("./15/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file0/file1") = 0 umount2("./15/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./15/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./15/file1/file0") = 0 umount2("./15/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file1") = 0 umount2("./15/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file2") = 0 umount2("./15/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file3") = 0 umount2("./15/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./15/file1") = -1 EBUSY (Device or resource busy) [ 25.081384][ T353] EXT4-fs (loop0): Ignoring removed orlov option [ 25.087746][ T353] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.106344][ T353] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./15/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./15/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./15") = 0 mkdir("./16", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x5555557ff660, 24) = 0 [pid 357] chdir("./16") = 0 [pid 357] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 357] setpgid(0, 0) = 0 [pid 357] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 357] write(3, "1000", 4) = 4 [pid 357] close(3) = 0 [pid 357] symlink("/dev/binderfs", "./binderfs"executing program ) = 0 [pid 357] write(1, "executing program\n", 18) = 18 [pid 357] memfd_create("syzkaller", 0) = 3 [pid 357] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 357] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 357] munmap(0x7f357c323000, 138412032) = 0 [pid 357] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 357] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 357] close(3) = 0 [pid 357] close(4) = 0 [pid 357] mkdir("./file1", 0777) = 0 [pid 357] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 357] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 357] chdir("./file1") = 0 [pid 357] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 357] ioctl(4, LOOP_CLR_FD) = 0 [pid 357] close(4) = 0 [pid 357] chdir("./file0") = 0 [pid 357] creat("./bus", 000) = 4 [pid 357] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 357] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 357] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 357] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 357] exit_group(0) = ? [pid 357] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=357, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./16", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./16/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/binderfs") = 0 umount2("./16/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./16/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./16/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./16/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./16/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./16/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./16/file1/lost+found") = 0 umount2("./16/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./16/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./16/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file0/file0") = 0 umount2("./16/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file0/file1") = 0 umount2("./16/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./16/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./16/file1/file0") = 0 umount2("./16/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file1") = 0 umount2("./16/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file2") = 0 umount2("./16/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file3") = 0 umount2("./16/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./16/file1") = -1 EBUSY (Device or resource busy) [ 25.202125][ T357] EXT4-fs (loop0): Ignoring removed orlov option [ 25.208517][ T357] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.226272][ T357] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./16/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./16/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./16") = 0 mkdir("./17", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 361 ./strace-static-x86_64: Process 361 attached [pid 361] set_robust_list(0x5555557ff660, 24) = 0 [pid 361] chdir("./17") = 0 [pid 361] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 361] setpgid(0, 0) = 0 [pid 361] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 361] write(3, "1000", 4) = 4 [pid 361] close(3) = 0 [pid 361] symlink("/dev/binderfs", "./binderfs") = 0 [pid 361] write(1, "executing program\n", 18executing program ) = 18 [pid 361] memfd_create("syzkaller", 0) = 3 [pid 361] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 361] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 361] munmap(0x7f357c323000, 138412032) = 0 [pid 361] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 361] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 361] close(3) = 0 [pid 361] close(4) = 0 [pid 361] mkdir("./file1", 0777) = 0 [pid 361] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 361] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 361] chdir("./file1") = 0 [pid 361] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 361] ioctl(4, LOOP_CLR_FD) = 0 [pid 361] close(4) = 0 [pid 361] chdir("./file0") = 0 [pid 361] creat("./bus", 000) = 4 [pid 361] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 361] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 361] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 361] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 361] exit_group(0) = ? [pid 361] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=361, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./17", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./17/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/binderfs") = 0 umount2("./17/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./17/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./17/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./17/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./17/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./17/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./17/file1/lost+found") = 0 umount2("./17/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./17/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./17/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file0/file0") = 0 umount2("./17/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file0/file1") = 0 umount2("./17/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./17/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./17/file1/file0") = 0 umount2("./17/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file1") = 0 umount2("./17/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file2") = 0 umount2("./17/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file3") = 0 umount2("./17/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./17/file1") = -1 EBUSY (Device or resource busy) [ 25.358839][ T361] EXT4-fs (loop0): Ignoring removed orlov option [ 25.365134][ T361] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.376042][ T361] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./17/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./17/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./17") = 0 mkdir("./18", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 366 ./strace-static-x86_64: Process 366 attached [pid 366] set_robust_list(0x5555557ff660, 24) = 0 [pid 366] chdir("./18") = 0 [pid 366] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 366] setpgid(0, 0) = 0 [pid 366] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 366] write(3, "1000", 4) = 4 [pid 366] close(3executing program ) = 0 [pid 366] symlink("/dev/binderfs", "./binderfs") = 0 [pid 366] write(1, "executing program\n", 18) = 18 [pid 366] memfd_create("syzkaller", 0) = 3 [pid 366] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 366] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 366] munmap(0x7f357c323000, 138412032) = 0 [pid 366] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 366] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 366] close(3) = 0 [pid 366] close(4) = 0 [pid 366] mkdir("./file1", 0777) = 0 [pid 366] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 366] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 366] chdir("./file1") = 0 [pid 366] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 366] ioctl(4, LOOP_CLR_FD) = 0 [pid 366] close(4) = 0 [pid 366] chdir("./file0") = 0 [pid 366] creat("./bus", 000) = 4 [pid 366] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 366] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 366] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 366] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 366] exit_group(0) = ? [pid 366] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=366, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./18", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./18/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/binderfs") = 0 umount2("./18/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./18/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./18/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./18/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./18/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./18/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./18/file1/lost+found") = 0 umount2("./18/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./18/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./18/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file0/file0") = 0 umount2("./18/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file0/file1") = 0 umount2("./18/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./18/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./18/file1/file0") = 0 umount2("./18/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file1") = 0 umount2("./18/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file2") = 0 umount2("./18/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file3") = 0 umount2("./18/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./18/file1") = -1 EBUSY (Device or resource busy) [ 25.528121][ T366] EXT4-fs (loop0): Ignoring removed orlov option [ 25.534288][ T366] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.545998][ T366] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./18/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./18/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./18") = 0 mkdir("./19", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 370 ./strace-static-x86_64: Process 370 attached [pid 370] set_robust_list(0x5555557ff660, 24) = 0 [pid 370] chdir("./19") = 0 [pid 370] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 370] setpgid(0, 0) = 0 [pid 370] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 370] write(3, "1000", 4) = 4 [pid 370] close(3) = 0 [pid 370] symlink("/dev/binderfs", "./binderfs") = 0 [pid 370] write(1, "executing program\n", 18executing program ) = 18 [pid 370] memfd_create("syzkaller", 0) = 3 [pid 370] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 370] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 370] munmap(0x7f357c323000, 138412032) = 0 [pid 370] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 370] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 370] close(3) = 0 [pid 370] close(4) = 0 [pid 370] mkdir("./file1", 0777) = 0 [pid 370] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 370] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 370] chdir("./file1") = 0 [pid 370] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 370] ioctl(4, LOOP_CLR_FD) = 0 [pid 370] close(4) = 0 [pid 370] chdir("./file0") = 0 [pid 370] creat("./bus", 000) = 4 [pid 370] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 370] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 370] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 370] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 370] exit_group(0) = ? [pid 370] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=370, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./19", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./19/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/binderfs") = 0 umount2("./19/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./19/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./19/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./19/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./19/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./19/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./19/file1/lost+found") = 0 umount2("./19/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./19/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./19/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file0/file0") = 0 umount2("./19/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file0/file1") = 0 umount2("./19/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./19/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./19/file1/file0") = 0 umount2("./19/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file1") = 0 umount2("./19/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file2") = 0 umount2("./19/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file3") = 0 umount2("./19/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./19/file1") = -1 EBUSY (Device or resource busy) [ 25.718862][ T370] EXT4-fs (loop0): Ignoring removed orlov option [ 25.725226][ T370] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.736098][ T370] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./19/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./19/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./19") = 0 mkdir("./20", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) executing program close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 374 ./strace-static-x86_64: Process 374 attached [pid 374] set_robust_list(0x5555557ff660, 24) = 0 [pid 374] chdir("./20") = 0 [pid 374] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 374] setpgid(0, 0) = 0 [pid 374] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 374] write(3, "1000", 4) = 4 [pid 374] close(3) = 0 [pid 374] symlink("/dev/binderfs", "./binderfs") = 0 [pid 374] write(1, "executing program\n", 18) = 18 [pid 374] memfd_create("syzkaller", 0) = 3 [pid 374] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 374] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 374] munmap(0x7f357c323000, 138412032) = 0 [pid 374] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 374] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 374] close(3) = 0 [pid 374] close(4) = 0 [pid 374] mkdir("./file1", 0777) = 0 [pid 374] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 374] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 374] chdir("./file1") = 0 [pid 374] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 374] ioctl(4, LOOP_CLR_FD) = 0 [pid 374] close(4) = 0 [pid 374] chdir("./file0") = 0 [pid 374] creat("./bus", 000) = 4 [pid 374] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 374] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 374] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 374] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 374] exit_group(0) = ? [pid 374] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=374, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- umount2("./20", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./20/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/binderfs") = 0 umount2("./20/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./20/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./20/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./20/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./20/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./20/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./20/file1/lost+found") = 0 umount2("./20/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./20/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./20/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file0/file0") = 0 umount2("./20/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file0/file1") = 0 umount2("./20/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./20/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./20/file1/file0") = 0 umount2("./20/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file1") = 0 umount2("./20/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file2") = 0 umount2("./20/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file3") = 0 umount2("./20/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./20/file1") = -1 EBUSY (Device or resource busy) [ 25.905538][ T374] EXT4-fs (loop0): Ignoring removed orlov option [ 25.911799][ T374] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 25.926207][ T374] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./20/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./20/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./20") = 0 mkdir("./21", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) executing program close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 378 ./strace-static-x86_64: Process 378 attached [pid 378] set_robust_list(0x5555557ff660, 24) = 0 [pid 378] chdir("./21") = 0 [pid 378] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 378] setpgid(0, 0) = 0 [pid 378] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 378] write(3, "1000", 4) = 4 [pid 378] close(3) = 0 [pid 378] symlink("/dev/binderfs", "./binderfs") = 0 [pid 378] write(1, "executing program\n", 18) = 18 [pid 378] memfd_create("syzkaller", 0) = 3 [pid 378] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 378] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 378] munmap(0x7f357c323000, 138412032) = 0 [pid 378] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 378] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 378] close(3) = 0 [pid 378] close(4) = 0 [pid 378] mkdir("./file1", 0777) = 0 [pid 378] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 378] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 378] chdir("./file1") = 0 [pid 378] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 378] ioctl(4, LOOP_CLR_FD) = 0 [pid 378] close(4) = 0 [pid 378] chdir("./file0") = 0 [pid 378] creat("./bus", 000) = 4 [pid 378] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 378] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 378] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 378] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 378] exit_group(0) = ? [pid 378] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=378, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./21", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./21/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/binderfs") = 0 umount2("./21/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./21/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./21/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./21/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./21/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./21/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./21/file1/lost+found") = 0 umount2("./21/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./21/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./21/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file0/file0") = 0 umount2("./21/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file0/file1") = 0 umount2("./21/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./21/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./21/file1/file0") = 0 umount2("./21/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file1") = 0 umount2("./21/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file2") = 0 umount2("./21/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file3") = 0 umount2("./21/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./21/file1") = -1 EBUSY (Device or resource busy) [ 26.077490][ T378] EXT4-fs (loop0): Ignoring removed orlov option [ 26.083713][ T378] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 26.096326][ T378] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./21/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./21/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./21") = 0 mkdir("./22", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 382 ./strace-static-x86_64: Process 382 attached [pid 382] set_robust_list(0x5555557ff660, 24) = 0 [pid 382] chdir("./22") = 0 [pid 382] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 382] setpgid(0, 0) = 0 [pid 382] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 382] write(3, "1000", 4) = 4 [pid 382] close(3) = 0 [pid 382] symlink("/dev/binderfs", "./binderfs") = 0 [pid 382] write(1, "executing program\n", 18) = 18 [pid 382] memfd_create("syzkaller", 0) = 3 [pid 382] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 executing program [pid 382] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 382] munmap(0x7f357c323000, 138412032) = 0 [pid 382] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 382] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 382] close(3) = 0 [pid 382] close(4) = 0 [pid 382] mkdir("./file1", 0777) = 0 [pid 382] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 382] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 382] chdir("./file1") = 0 [pid 382] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 382] ioctl(4, LOOP_CLR_FD) = 0 [pid 382] close(4) = 0 [pid 382] chdir("./file0") = 0 [pid 382] creat("./bus", 000) = 4 [pid 382] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 382] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 382] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 382] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 382] exit_group(0) = ? [pid 382] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=382, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./22", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./22/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/binderfs") = 0 umount2("./22/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./22/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./22/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./22/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./22/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./22/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./22/file1/lost+found") = 0 umount2("./22/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./22/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./22/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file0/file0") = 0 umount2("./22/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file0/file1") = 0 umount2("./22/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./22/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./22/file1/file0") = 0 umount2("./22/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file1") = 0 umount2("./22/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file2") = 0 umount2("./22/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file3") = 0 umount2("./22/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./22/file1") = -1 EBUSY (Device or resource busy) [ 26.267737][ T382] EXT4-fs (loop0): Ignoring removed orlov option [ 26.274030][ T382] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 26.286275][ T382] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./22/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./22/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./22") = 0 mkdir("./23", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 387 ./strace-static-x86_64: Process 387 attached [pid 387] set_robust_list(0x5555557ff660, 24) = 0 executing program [pid 387] chdir("./23") = 0 [pid 387] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 387] setpgid(0, 0) = 0 [pid 387] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 387] write(3, "1000", 4) = 4 [pid 387] close(3) = 0 [pid 387] symlink("/dev/binderfs", "./binderfs") = 0 [pid 387] write(1, "executing program\n", 18) = 18 [pid 387] memfd_create("syzkaller", 0) = 3 [pid 387] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 387] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 387] munmap(0x7f357c323000, 138412032) = 0 [pid 387] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 387] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 387] close(3) = 0 [pid 387] close(4) = 0 [pid 387] mkdir("./file1", 0777) = 0 [pid 387] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 387] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 387] chdir("./file1") = 0 [pid 387] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 387] ioctl(4, LOOP_CLR_FD) = 0 [pid 387] close(4) = 0 [pid 387] chdir("./file0") = 0 [pid 387] creat("./bus", 000) = 4 [pid 387] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 387] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 387] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 387] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 387] exit_group(0) = ? [pid 387] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=387, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./23", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./23/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/binderfs") = 0 umount2("./23/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./23/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./23/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./23/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./23/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./23/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./23/file1/lost+found") = 0 umount2("./23/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./23/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./23/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file0/file0") = 0 umount2("./23/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file0/file1") = 0 umount2("./23/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./23/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./23/file1/file0") = 0 umount2("./23/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file1") = 0 umount2("./23/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file2") = 0 umount2("./23/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file3") = 0 umount2("./23/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./23/file1") = -1 EBUSY (Device or resource busy) [ 26.507514][ T387] EXT4-fs (loop0): Ignoring removed orlov option [ 26.513695][ T387] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 26.525931][ T387] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./23/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./23/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./23") = 0 mkdir("./24", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 391 ./strace-static-x86_64: Process 391 attached [pid 391] set_robust_list(0x5555557ff660, 24) = 0 [pid 391] chdir("./24") = 0 [pid 391] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 391] setpgid(0, 0) = 0 [pid 391] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 391] write(3, "1000", 4) = 4 [pid 391] close(3) = 0 [pid 391] symlink("/dev/binderfs", "./binderfs") = 0 [pid 391] write(1, "executing program\n", 18) = 18 [pid 391] memfd_create("syzkaller", 0) = 3 [pid 391] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 391] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 391] munmap(0x7f357c323000, 138412032) = 0 [pid 391] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 391] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 391] close(3) = 0 [pid 391] close(4) = 0 [pid 391] mkdir("./file1", 0777) = 0 [pid 391] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 391] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 391] chdir("./file1") = 0 [pid 391] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 391] ioctl(4, LOOP_CLR_FD) = 0 [pid 391] close(4) = 0 [pid 391] chdir("./file0") = 0 [pid 391] creat("./bus", 000) = 4 [pid 391] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 391] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 391] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 391] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 391] exit_group(0) = ? [pid 391] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=391, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./24", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./24/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/binderfs") = 0 umount2("./24/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./24/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./24/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./24/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./24/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./24/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./24/file1/lost+found") = 0 umount2("./24/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./24/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./24/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file0/file0") = 0 umount2("./24/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file0/file1") = 0 umount2("./24/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./24/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./24/file1/file0") = 0 umount2("./24/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file1") = 0 umount2("./24/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file2") = 0 umount2("./24/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file3") = 0 umount2("./24/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./24/file1") = -1 EBUSY (Device or resource busy) [ 26.678167][ T391] EXT4-fs (loop0): Ignoring removed orlov option [ 26.684453][ T391] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 26.695997][ T391] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./24/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./24/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./24") = 0 mkdir("./25", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program , child_tidptr=0x5555557ff650) = 395 ./strace-static-x86_64: Process 395 attached [pid 395] set_robust_list(0x5555557ff660, 24) = 0 [pid 395] chdir("./25") = 0 [pid 395] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 395] setpgid(0, 0) = 0 [pid 395] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 395] write(3, "1000", 4) = 4 [pid 395] close(3) = 0 [pid 395] symlink("/dev/binderfs", "./binderfs") = 0 [pid 395] write(1, "executing program\n", 18) = 18 [pid 395] memfd_create("syzkaller", 0) = 3 [pid 395] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 395] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 395] munmap(0x7f357c323000, 138412032) = 0 [pid 395] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 395] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 395] close(3) = 0 [pid 395] close(4) = 0 [pid 395] mkdir("./file1", 0777) = 0 [pid 395] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 395] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 395] chdir("./file1") = 0 [pid 395] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 395] ioctl(4, LOOP_CLR_FD) = 0 [pid 395] close(4) = 0 [pid 395] chdir("./file0") = 0 [pid 395] creat("./bus", 000) = 4 [pid 395] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 395] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 395] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 395] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 395] exit_group(0) = ? [pid 395] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=395, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./25", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./25/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/binderfs") = 0 umount2("./25/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./25/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./25/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./25/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./25/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./25/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./25/file1/lost+found") = 0 umount2("./25/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./25/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./25/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file0/file0") = 0 umount2("./25/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file0/file1") = 0 umount2("./25/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./25/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./25/file1/file0") = 0 umount2("./25/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file1") = 0 umount2("./25/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file2") = 0 umount2("./25/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file3") = 0 umount2("./25/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./25/file1") = -1 EBUSY (Device or resource busy) [ 26.856288][ T395] EXT4-fs (loop0): Ignoring removed orlov option [ 26.862865][ T395] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 26.875938][ T395] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./25/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./25/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./25") = 0 mkdir("./26", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) executing program close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 399 ./strace-static-x86_64: Process 399 attached [pid 399] set_robust_list(0x5555557ff660, 24) = 0 [pid 399] chdir("./26") = 0 [pid 399] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 399] setpgid(0, 0) = 0 [pid 399] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 399] write(3, "1000", 4) = 4 [pid 399] close(3) = 0 [pid 399] symlink("/dev/binderfs", "./binderfs") = 0 [pid 399] write(1, "executing program\n", 18) = 18 [pid 399] memfd_create("syzkaller", 0) = 3 [pid 399] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 399] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 399] munmap(0x7f357c323000, 138412032) = 0 [pid 399] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 399] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 399] close(3) = 0 [pid 399] close(4) = 0 [pid 399] mkdir("./file1", 0777) = 0 [pid 399] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 399] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 399] chdir("./file1") = 0 [pid 399] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 399] ioctl(4, LOOP_CLR_FD) = 0 [pid 399] close(4) = 0 [pid 399] chdir("./file0") = 0 [pid 399] creat("./bus", 000) = 4 [pid 399] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 399] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 399] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 399] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 399] exit_group(0) = ? [pid 399] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=399, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./26", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./26/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/binderfs") = 0 umount2("./26/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./26/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./26/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./26/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./26/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./26/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./26/file1/lost+found") = 0 umount2("./26/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./26/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./26/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file0/file0") = 0 umount2("./26/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file0/file1") = 0 umount2("./26/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./26/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./26/file1/file0") = 0 umount2("./26/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file1") = 0 umount2("./26/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file2") = 0 umount2("./26/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file3") = 0 umount2("./26/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./26/file1") = -1 EBUSY (Device or resource busy) [ 27.035643][ T399] EXT4-fs (loop0): Ignoring removed orlov option [ 27.041783][ T399] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.056315][ T399] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./26/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./26/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./26") = 0 mkdir("./27", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 403 ./strace-static-x86_64: Process 403 attached [pid 403] set_robust_list(0x5555557ff660, 24) = 0 [pid 403] chdir("./27") = 0 [pid 403] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 403] setpgid(0, 0) = 0 [pid 403] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 403] write(3, "1000", 4) = 4 [pid 403] close(3) = 0 [pid 403] symlink("/dev/binderfs", "./binderfs") = 0 [pid 403] write(1, "executing program\n", 18) = 18 [pid 403] memfd_create("syzkaller", 0) = 3 [pid 403] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 403] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 403] munmap(0x7f357c323000, 138412032) = 0 [pid 403] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 403] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 403] close(3) = 0 [pid 403] close(4) = 0 [pid 403] mkdir("./file1", 0777) = 0 [pid 403] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 403] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 403] chdir("./file1") = 0 [pid 403] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 403] ioctl(4, LOOP_CLR_FD) = 0 [pid 403] close(4) = 0 [pid 403] chdir("./file0") = 0 [pid 403] creat("./bus", 000) = 4 [pid 403] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 403] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 403] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 403] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 403] exit_group(0) = ? [pid 403] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=403, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./27", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./27/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/binderfs") = 0 umount2("./27/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./27/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./27/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./27/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./27/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./27/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./27/file1/lost+found") = 0 umount2("./27/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./27/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./27/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file0/file0") = 0 umount2("./27/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file0/file1") = 0 umount2("./27/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./27/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./27/file1/file0") = 0 umount2("./27/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file1") = 0 umount2("./27/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file2") = 0 umount2("./27/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file3") = 0 umount2("./27/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./27/file1") = -1 EBUSY (Device or resource busy) [ 27.228501][ T403] EXT4-fs (loop0): Ignoring removed orlov option [ 27.234781][ T403] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.246091][ T403] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./27/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./27/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./27") = 0 mkdir("./28", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 407 ./strace-static-x86_64: Process 407 attached [pid 407] set_robust_list(0x5555557ff660, 24) = 0 [pid 407] chdir("./28") = 0 [pid 407] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 407] setpgid(0, 0) = 0 [pid 407] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 407] write(3, "1000", 4) = 4 [pid 407] close(3) = 0 [pid 407] symlink("/dev/binderfs", "./binderfs") = 0 [pid 407] write(1, "executing program\n", 18) = 18 [pid 407] memfd_create("syzkaller", 0) = 3 [pid 407] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 executing program [pid 407] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 407] munmap(0x7f357c323000, 138412032) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 407] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 407] close(3) = 0 [pid 407] close(4) = 0 [pid 407] mkdir("./file1", 0777) = 0 [pid 407] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 407] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 407] chdir("./file1") = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 407] ioctl(4, LOOP_CLR_FD) = 0 [pid 407] close(4) = 0 [pid 407] chdir("./file0") = 0 [pid 407] creat("./bus", 000) = 4 [pid 407] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 407] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 407] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 407] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 407] exit_group(0) = ? [pid 407] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=407, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./28", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./28/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/binderfs") = 0 umount2("./28/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./28/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./28/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./28/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./28/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./28/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./28/file1/lost+found") = 0 umount2("./28/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./28/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./28/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file0/file0") = 0 umount2("./28/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file0/file1") = 0 umount2("./28/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./28/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./28/file1/file0") = 0 umount2("./28/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file1") = 0 umount2("./28/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file2") = 0 umount2("./28/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file3") = 0 umount2("./28/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./28/file1") = -1 EBUSY (Device or resource busy) [ 27.425634][ T407] EXT4-fs (loop0): Ignoring removed orlov option [ 27.432165][ T407] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.446271][ T407] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./28/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./28/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./28") = 0 mkdir("./29", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 412 ./strace-static-x86_64: Process 412 attached [pid 412] set_robust_list(0x5555557ff660, 24) = 0 [pid 412] chdir("./29") = 0 [pid 412] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 412] setpgid(0, 0) = 0 [pid 412] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 412] write(3, "1000", 4) = 4 [pid 412] close(3) = 0 [pid 412] symlink("/dev/binderfs", "./binderfs") = 0 [pid 412] write(1, "executing program\n", 18executing program ) = 18 [pid 412] memfd_create("syzkaller", 0) = 3 [pid 412] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 412] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 412] munmap(0x7f357c323000, 138412032) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 412] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 412] close(3) = 0 [pid 412] close(4) = 0 [pid 412] mkdir("./file1", 0777) = 0 [pid 412] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 412] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 412] chdir("./file1") = 0 [pid 412] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 412] ioctl(4, LOOP_CLR_FD) = 0 [pid 412] close(4) = 0 [pid 412] chdir("./file0") = 0 [pid 412] creat("./bus", 000) = 4 [pid 412] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 412] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 412] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 412] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 412] exit_group(0) = ? [pid 412] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=412, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./29", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./29/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/binderfs") = 0 umount2("./29/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./29/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./29/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./29/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./29/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./29/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./29/file1/lost+found") = 0 umount2("./29/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./29/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./29/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file0/file0") = 0 umount2("./29/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file0/file1") = 0 umount2("./29/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./29/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./29/file1/file0") = 0 umount2("./29/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file1") = 0 umount2("./29/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file2") = 0 umount2("./29/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file3") = 0 umount2("./29/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./29/file1") = -1 EBUSY (Device or resource busy) [ 27.636486][ T412] EXT4-fs (loop0): Ignoring removed orlov option [ 27.642656][ T412] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.656383][ T412] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./29/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./29/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./29") = 0 mkdir("./30", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 416 ./strace-static-x86_64: Process 416 attached [pid 416] set_robust_list(0x5555557ff660, 24) = 0 [pid 416] chdir("./30") = 0 [pid 416] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 416] setpgid(0, 0) = 0 [pid 416] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 416] write(3, "1000", 4) = 4 [pid 416] close(3) = 0 [pid 416] symlink("/dev/binderfs", "./binderfs") = 0 [pid 416] write(1, "executing program\n", 18) = 18 [pid 416] memfd_create("syzkaller", 0) = 3 [pid 416] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 416] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 416] munmap(0x7f357c323000, 138412032) = 0 [pid 416] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 416] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 416] close(3) = 0 [pid 416] close(4) = 0 [pid 416] mkdir("./file1", 0777) = 0 [pid 416] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 416] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 416] chdir("./file1") = 0 [pid 416] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 416] ioctl(4, LOOP_CLR_FD) = 0 [pid 416] close(4) = 0 [pid 416] chdir("./file0") = 0 [pid 416] creat("./bus", 000) = 4 [pid 416] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 416] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 416] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 416] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 416] exit_group(0) = ? [pid 416] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=416, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./30", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./30/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/binderfs") = 0 umount2("./30/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./30/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./30/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./30/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./30/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./30/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./30/file1/lost+found") = 0 umount2("./30/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./30/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./30/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file0/file0") = 0 umount2("./30/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file0/file1") = 0 umount2("./30/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./30/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./30/file1/file0") = 0 umount2("./30/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file1") = 0 umount2("./30/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file2") = 0 umount2("./30/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file3") = 0 umount2("./30/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./30/file1") = -1 EBUSY (Device or resource busy) [ 27.855369][ T416] EXT4-fs (loop0): Ignoring removed orlov option [ 27.861566][ T416] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 27.876127][ T416] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./30/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./30/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./30") = 0 mkdir("./31", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 420 ./strace-static-x86_64: Process 420 attached [pid 420] set_robust_list(0x5555557ff660, 24) = 0 [pid 420] chdir("./31") = 0 [pid 420] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 420] setpgid(0, 0) = 0 [pid 420] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 420] write(3, "1000", 4) = 4 [pid 420] close(3) = 0 [pid 420] symlink("/dev/binderfs", "./binderfs"executing program ) = 0 [pid 420] write(1, "executing program\n", 18) = 18 [pid 420] memfd_create("syzkaller", 0) = 3 [pid 420] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 420] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 420] munmap(0x7f357c323000, 138412032) = 0 [pid 420] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 420] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 420] close(3) = 0 [pid 420] close(4) = 0 [pid 420] mkdir("./file1", 0777) = 0 [pid 420] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 420] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 420] chdir("./file1") = 0 [pid 420] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 420] ioctl(4, LOOP_CLR_FD) = 0 [pid 420] close(4) = 0 [pid 420] chdir("./file0") = 0 [pid 420] creat("./bus", 000) = 4 [pid 420] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 420] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 420] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 420] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 420] exit_group(0) = ? [pid 420] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=420, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./31", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./31/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/binderfs") = 0 umount2("./31/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./31/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./31/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./31/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./31/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./31/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./31/file1/lost+found") = 0 umount2("./31/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./31/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./31/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file0/file0") = 0 umount2("./31/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file0/file1") = 0 umount2("./31/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./31/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./31/file1/file0") = 0 umount2("./31/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file1") = 0 umount2("./31/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file2") = 0 umount2("./31/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file3") = 0 umount2("./31/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./31/file1") = -1 EBUSY (Device or resource busy) [ 28.039920][ T420] EXT4-fs (loop0): Ignoring removed orlov option [ 28.046140][ T420] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.056157][ T420] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./31/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./31/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./31") = 0 mkdir("./32", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 424 ./strace-static-x86_64: Process 424 attached [pid 424] set_robust_list(0x5555557ff660, 24) = 0 [pid 424] chdir("./32") = 0 [pid 424] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 424] setpgid(0, 0) = 0 [pid 424] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 424] write(3, "1000", 4) = 4 [pid 424] close(3) = 0 [pid 424] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 424] write(1, "executing program\n", 18) = 18 [pid 424] memfd_create("syzkaller", 0) = 3 [pid 424] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 424] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 424] munmap(0x7f357c323000, 138412032) = 0 [pid 424] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 424] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 424] close(3) = 0 [pid 424] close(4) = 0 [pid 424] mkdir("./file1", 0777) = 0 [pid 424] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 424] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 424] chdir("./file1") = 0 [pid 424] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 424] ioctl(4, LOOP_CLR_FD) = 0 [pid 424] close(4) = 0 [pid 424] chdir("./file0") = 0 [pid 424] creat("./bus", 000) = 4 [pid 424] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 424] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 424] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 424] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 424] exit_group(0) = ? [pid 424] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=424, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./32", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./32/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/binderfs") = 0 umount2("./32/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./32/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./32/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./32/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./32/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./32/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./32/file1/lost+found") = 0 umount2("./32/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./32/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./32/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file0/file0") = 0 umount2("./32/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file0/file1") = 0 umount2("./32/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./32/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./32/file1/file0") = 0 umount2("./32/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file1") = 0 umount2("./32/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file2") = 0 umount2("./32/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file3") = 0 umount2("./32/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./32/file1") = -1 EBUSY (Device or resource busy) [ 28.208804][ T424] EXT4-fs (loop0): Ignoring removed orlov option [ 28.215014][ T424] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.225879][ T424] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./32/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./32/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./32") = 0 mkdir("./33", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 428 ./strace-static-x86_64: Process 428 attached [pid 428] set_robust_list(0x5555557ff660, 24) = 0 [pid 428] chdir("./33") = 0 [pid 428] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 428] setpgid(0, 0) = 0 [pid 428] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 428] write(3, "1000", 4) = 4 [pid 428] close(3) = 0 [pid 428] symlink("/dev/binderfs", "./binderfs") = 0 [pid 428] write(1, "executing program\n", 18executing program ) = 18 [pid 428] memfd_create("syzkaller", 0) = 3 [pid 428] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 428] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 428] munmap(0x7f357c323000, 138412032) = 0 [pid 428] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 428] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 428] close(3) = 0 [pid 428] close(4) = 0 [pid 428] mkdir("./file1", 0777) = 0 [pid 428] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 428] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 428] chdir("./file1") = 0 [pid 428] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 428] ioctl(4, LOOP_CLR_FD) = 0 [pid 428] close(4) = 0 [pid 428] chdir("./file0") = 0 [pid 428] creat("./bus", 000) = 4 [pid 428] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 428] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 428] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 428] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 428] exit_group(0) = ? [pid 428] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=428, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- umount2("./33", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./33/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/binderfs") = 0 umount2("./33/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./33/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./33/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./33/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./33/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./33/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./33/file1/lost+found") = 0 umount2("./33/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./33/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./33/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file0/file0") = 0 umount2("./33/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file0/file1") = 0 umount2("./33/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./33/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./33/file1/file0") = 0 umount2("./33/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file1") = 0 umount2("./33/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file2") = 0 umount2("./33/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file3") = 0 umount2("./33/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./33/file1") = -1 EBUSY (Device or resource busy) [ 28.379214][ T428] EXT4-fs (loop0): Ignoring removed orlov option [ 28.386115][ T428] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.396086][ T428] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./33/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./33/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./33") = 0 mkdir("./34", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 433 ./strace-static-x86_64: Process 433 attached [pid 433] set_robust_list(0x5555557ff660, 24) = 0 [pid 433] chdir("./34") = 0 [pid 433] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 433] setpgid(0, 0) = 0 [pid 433] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 433] write(3, "1000", 4) = 4 [pid 433] close(3) = 0 [pid 433] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 433] write(1, "executing program\n", 18) = 18 [pid 433] memfd_create("syzkaller", 0) = 3 [pid 433] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 433] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 433] munmap(0x7f357c323000, 138412032) = 0 [pid 433] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 433] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 433] close(3) = 0 [pid 433] close(4) = 0 [pid 433] mkdir("./file1", 0777) = 0 [pid 433] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 433] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 433] chdir("./file1") = 0 [pid 433] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 433] ioctl(4, LOOP_CLR_FD) = 0 [pid 433] close(4) = 0 [pid 433] chdir("./file0") = 0 [pid 433] creat("./bus", 000) = 4 [pid 433] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 433] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 433] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 433] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 433] exit_group(0) = ? [pid 433] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=433, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./34", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./34/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/binderfs") = 0 umount2("./34/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./34/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./34/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./34/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./34/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./34/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./34/file1/lost+found") = 0 umount2("./34/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./34/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./34/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file0/file0") = 0 umount2("./34/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file0/file1") = 0 umount2("./34/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./34/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./34/file1/file0") = 0 umount2("./34/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file1") = 0 umount2("./34/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file2") = 0 umount2("./34/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file3") = 0 umount2("./34/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./34/file1") = -1 EBUSY (Device or resource busy) [ 28.518065][ T433] EXT4-fs (loop0): Ignoring removed orlov option [ 28.524540][ T433] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.536358][ T433] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./34/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./34/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./34") = 0 mkdir("./35", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FDexecuting program ) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 437 ./strace-static-x86_64: Process 437 attached [pid 437] set_robust_list(0x5555557ff660, 24) = 0 [pid 437] chdir("./35") = 0 [pid 437] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 437] setpgid(0, 0) = 0 [pid 437] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 437] write(3, "1000", 4) = 4 [pid 437] close(3) = 0 [pid 437] symlink("/dev/binderfs", "./binderfs") = 0 [pid 437] write(1, "executing program\n", 18) = 18 [pid 437] memfd_create("syzkaller", 0) = 3 [pid 437] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 437] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 437] munmap(0x7f357c323000, 138412032) = 0 [pid 437] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 437] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 437] close(3) = 0 [pid 437] close(4) = 0 [pid 437] mkdir("./file1", 0777) = 0 [pid 437] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 437] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 437] chdir("./file1") = 0 [pid 437] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 437] ioctl(4, LOOP_CLR_FD) = 0 [pid 437] close(4) = 0 [pid 437] chdir("./file0") = 0 [pid 437] creat("./bus", 000) = 4 [pid 437] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 437] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 437] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 437] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 437] exit_group(0) = ? [pid 437] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=437, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./35", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./35/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/binderfs") = 0 umount2("./35/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./35/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./35/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./35/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./35/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./35/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./35/file1/lost+found") = 0 umount2("./35/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./35/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./35/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file0/file0") = 0 umount2("./35/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file0/file1") = 0 umount2("./35/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./35/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./35/file1/file0") = 0 umount2("./35/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file1") = 0 umount2("./35/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file2") = 0 umount2("./35/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file3") = 0 umount2("./35/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./35/file1") = -1 EBUSY (Device or resource busy) [ 28.679103][ T437] EXT4-fs (loop0): Ignoring removed orlov option [ 28.685359][ T437] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.696528][ T437] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./35/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./35/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./35") = 0 mkdir("./36", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program , child_tidptr=0x5555557ff650) = 441 ./strace-static-x86_64: Process 441 attached [pid 441] set_robust_list(0x5555557ff660, 24) = 0 [pid 441] chdir("./36") = 0 [pid 441] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 441] setpgid(0, 0) = 0 [pid 441] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 441] write(3, "1000", 4) = 4 [pid 441] close(3) = 0 [pid 441] symlink("/dev/binderfs", "./binderfs") = 0 [pid 441] write(1, "executing program\n", 18) = 18 [pid 441] memfd_create("syzkaller", 0) = 3 [pid 441] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 441] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 441] munmap(0x7f357c323000, 138412032) = 0 [pid 441] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 441] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 441] close(3) = 0 [pid 441] close(4) = 0 [pid 441] mkdir("./file1", 0777) = 0 [pid 441] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 441] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 441] chdir("./file1") = 0 [pid 441] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 441] ioctl(4, LOOP_CLR_FD) = 0 [pid 441] close(4) = 0 [pid 441] chdir("./file0") = 0 [pid 441] creat("./bus", 000) = 4 [pid 441] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 441] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 441] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 441] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 441] exit_group(0) = ? [pid 441] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=441, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./36", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./36/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/binderfs") = 0 umount2("./36/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./36/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./36/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./36/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./36/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./36/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./36/file1/lost+found") = 0 umount2("./36/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./36/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./36/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file0/file0") = 0 umount2("./36/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file0/file1") = 0 umount2("./36/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./36/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./36/file1/file0") = 0 umount2("./36/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file1") = 0 umount2("./36/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file2") = 0 umount2("./36/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file3") = 0 umount2("./36/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./36/file1") = -1 EBUSY (Device or resource busy) [ 28.932214][ T441] EXT4-fs (loop0): Ignoring removed orlov option [ 28.939449][ T441] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 28.956275][ T441] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./36/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./36/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./36") = 0 mkdir("./37", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3executing program ) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 445 ./strace-static-x86_64: Process 445 attached [pid 445] set_robust_list(0x5555557ff660, 24) = 0 [pid 445] chdir("./37") = 0 [pid 445] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 445] setpgid(0, 0) = 0 [pid 445] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 445] write(3, "1000", 4) = 4 [pid 445] close(3) = 0 [pid 445] symlink("/dev/binderfs", "./binderfs") = 0 [pid 445] write(1, "executing program\n", 18) = 18 [pid 445] memfd_create("syzkaller", 0) = 3 [pid 445] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 445] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 445] munmap(0x7f357c323000, 138412032) = 0 [pid 445] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 445] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 445] close(3) = 0 [pid 445] close(4) = 0 [pid 445] mkdir("./file1", 0777) = 0 [pid 445] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 445] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 445] chdir("./file1") = 0 [pid 445] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 445] ioctl(4, LOOP_CLR_FD) = 0 [pid 445] close(4) = 0 [pid 445] chdir("./file0") = 0 [pid 445] creat("./bus", 000) = 4 [pid 445] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 445] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 445] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 445] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 445] exit_group(0) = ? [pid 445] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=445, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./37", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./37/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/binderfs") = 0 umount2("./37/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./37/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./37/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./37/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./37/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./37/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./37/file1/lost+found") = 0 umount2("./37/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./37/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./37/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file0/file0") = 0 umount2("./37/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file0/file1") = 0 umount2("./37/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./37/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./37/file1/file0") = 0 umount2("./37/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file1") = 0 umount2("./37/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file2") = 0 umount2("./37/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file3") = 0 umount2("./37/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./37/file1") = -1 EBUSY (Device or resource busy) [ 29.205627][ T445] EXT4-fs (loop0): Ignoring removed orlov option [ 29.211803][ T445] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.226129][ T445] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./37/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./37/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./37") = 0 mkdir("./38", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 449 ./strace-static-x86_64: Process 449 attached [pid 449] set_robust_list(0x5555557ff660, 24) = 0 executing program [pid 449] chdir("./38") = 0 [pid 449] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 449] setpgid(0, 0) = 0 [pid 449] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 449] write(3, "1000", 4) = 4 [pid 449] close(3) = 0 [pid 449] symlink("/dev/binderfs", "./binderfs") = 0 [pid 449] write(1, "executing program\n", 18) = 18 [pid 449] memfd_create("syzkaller", 0) = 3 [pid 449] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 449] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 449] munmap(0x7f357c323000, 138412032) = 0 [pid 449] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 449] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 449] close(3) = 0 [pid 449] close(4) = 0 [pid 449] mkdir("./file1", 0777) = 0 [pid 449] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 449] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 449] chdir("./file1") = 0 [pid 449] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 449] ioctl(4, LOOP_CLR_FD) = 0 [pid 449] close(4) = 0 [pid 449] chdir("./file0") = 0 [pid 449] creat("./bus", 000) = 4 [pid 449] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 449] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 449] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 449] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 449] exit_group(0) = ? [pid 449] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=449, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./38", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./38/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/binderfs") = 0 umount2("./38/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./38/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./38/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./38/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./38/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./38/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./38/file1/lost+found") = 0 umount2("./38/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./38/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./38/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file0/file0") = 0 umount2("./38/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file0/file1") = 0 umount2("./38/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./38/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./38/file1/file0") = 0 umount2("./38/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file1") = 0 umount2("./38/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file2") = 0 umount2("./38/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file3") = 0 umount2("./38/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./38/file1") = -1 EBUSY (Device or resource busy) umount2("./38/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./38/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./38") = 0 mkdir("./39", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [ 29.387225][ T449] EXT4-fs (loop0): Ignoring removed orlov option [ 29.393680][ T449] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.405950][ T449] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 454 ./strace-static-x86_64: Process 454 attached [pid 454] set_robust_list(0x5555557ff660, 24) = 0 [pid 454] chdir("./39") = 0 [pid 454] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 454] setpgid(0, 0) = 0 [pid 454] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 454] write(3, "1000", 4) = 4 [pid 454] close(3) = 0 [pid 454] symlink("/dev/binderfs", "./binderfs") = 0 [pid 454] write(1, "executing program\n", 18executing program ) = 18 [pid 454] memfd_create("syzkaller", 0) = 3 [pid 454] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 454] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 454] munmap(0x7f357c323000, 138412032) = 0 [pid 454] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 454] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 454] close(3) = 0 [pid 454] close(4) = 0 [pid 454] mkdir("./file1", 0777) = 0 [pid 454] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 454] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 454] chdir("./file1") = 0 [pid 454] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 454] ioctl(4, LOOP_CLR_FD) = 0 [pid 454] close(4) = 0 [pid 454] chdir("./file0") = 0 [pid 454] creat("./bus", 000) = 4 [pid 454] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 454] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 454] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 454] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 454] exit_group(0) = ? [pid 454] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=454, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./39", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./39/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/binderfs") = 0 umount2("./39/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./39/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./39/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./39/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./39/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./39/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./39/file1/lost+found") = 0 umount2("./39/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./39/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./39/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file0/file0") = 0 umount2("./39/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file0/file1") = 0 umount2("./39/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./39/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./39/file1/file0") = 0 umount2("./39/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file1") = 0 umount2("./39/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file2") = 0 umount2("./39/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file3") = 0 umount2("./39/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./39/file1") = -1 EBUSY (Device or resource busy) [ 29.508411][ T454] EXT4-fs (loop0): Ignoring removed orlov option [ 29.514705][ T454] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.525894][ T454] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./39/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./39/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./39") = 0 mkdir("./40", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 458 ./strace-static-x86_64: Process 458 attached [pid 458] set_robust_list(0x5555557ff660, 24) = 0 [pid 458] chdir("./40") = 0 [pid 458] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 458] setpgid(0, 0) = 0 [pid 458] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 458] write(3, "1000", 4) = 4 [pid 458] close(3) = 0 [pid 458] symlink("/dev/binderfs", "./binderfs") = 0 [pid 458] write(1, "executing program\n", 18) = 18 [pid 458] memfd_create("syzkaller", 0) = 3 [pid 458] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 458] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 458] munmap(0x7f357c323000, 138412032) = 0 [pid 458] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 458] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 458] close(3) = 0 [pid 458] close(4) = 0 [pid 458] mkdir("./file1", 0777) = 0 [pid 458] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 458] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 458] chdir("./file1") = 0 [pid 458] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 458] ioctl(4, LOOP_CLR_FD) = 0 [pid 458] close(4) = 0 [pid 458] chdir("./file0") = 0 [pid 458] creat("./bus", 000) = 4 [pid 458] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 458] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 458] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 458] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 458] exit_group(0) = ? [pid 458] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=458, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./40", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./40/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/binderfs") = 0 umount2("./40/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./40/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./40/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./40/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./40/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./40/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./40/file1/lost+found") = 0 umount2("./40/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./40/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./40/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file0/file0") = 0 umount2("./40/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file0/file1") = 0 umount2("./40/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./40/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./40/file1/file0") = 0 umount2("./40/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file1") = 0 umount2("./40/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file2") = 0 umount2("./40/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file3") = 0 umount2("./40/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./40/file1") = -1 EBUSY (Device or resource busy) [ 29.708427][ T458] EXT4-fs (loop0): Ignoring removed orlov option [ 29.714880][ T458] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.725955][ T458] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./40/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./40/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./40") = 0 mkdir("./41", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program , child_tidptr=0x5555557ff650) = 462 ./strace-static-x86_64: Process 462 attached [pid 462] set_robust_list(0x5555557ff660, 24) = 0 [pid 462] chdir("./41") = 0 [pid 462] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 462] setpgid(0, 0) = 0 [pid 462] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 462] write(3, "1000", 4) = 4 [pid 462] close(3) = 0 [pid 462] symlink("/dev/binderfs", "./binderfs") = 0 [pid 462] write(1, "executing program\n", 18) = 18 [pid 462] memfd_create("syzkaller", 0) = 3 [pid 462] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 462] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 462] munmap(0x7f357c323000, 138412032) = 0 [pid 462] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 462] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 462] close(3) = 0 [pid 462] close(4) = 0 [pid 462] mkdir("./file1", 0777) = 0 [pid 462] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 462] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 462] chdir("./file1") = 0 [pid 462] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 462] ioctl(4, LOOP_CLR_FD) = 0 [pid 462] close(4) = 0 [pid 462] chdir("./file0") = 0 [pid 462] creat("./bus", 000) = 4 [pid 462] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 462] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 462] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 462] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 462] exit_group(0) = ? [pid 462] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=462, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./41", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./41/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/binderfs") = 0 umount2("./41/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./41/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./41/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./41/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./41/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./41/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./41/file1/lost+found") = 0 umount2("./41/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./41/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./41/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file0/file0") = 0 umount2("./41/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file0/file1") = 0 umount2("./41/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./41/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./41/file1/file0") = 0 umount2("./41/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file1") = 0 umount2("./41/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file2") = 0 umount2("./41/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file3") = 0 umount2("./41/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./41/file1") = -1 EBUSY (Device or resource busy) [ 29.916165][ T462] EXT4-fs (loop0): Ignoring removed orlov option [ 29.923013][ T462] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 29.936131][ T462] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./41/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./41/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./41") = 0 mkdir("./42", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) executing program close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 466 ./strace-static-x86_64: Process 466 attached [pid 466] set_robust_list(0x5555557ff660, 24) = 0 [pid 466] chdir("./42") = 0 [pid 466] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 466] setpgid(0, 0) = 0 [pid 466] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 466] write(3, "1000", 4) = 4 [pid 466] close(3) = 0 [pid 466] symlink("/dev/binderfs", "./binderfs") = 0 [pid 466] write(1, "executing program\n", 18) = 18 [pid 466] memfd_create("syzkaller", 0) = 3 [pid 466] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 466] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 466] munmap(0x7f357c323000, 138412032) = 0 [pid 466] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 466] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 466] close(3) = 0 [pid 466] close(4) = 0 [pid 466] mkdir("./file1", 0777) = 0 [pid 466] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 466] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 466] chdir("./file1") = 0 [pid 466] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 466] ioctl(4, LOOP_CLR_FD) = 0 [pid 466] close(4) = 0 [pid 466] chdir("./file0") = 0 [pid 466] creat("./bus", 000) = 4 [pid 466] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 466] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 466] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 466] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 466] exit_group(0) = ? [pid 466] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=466, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./42", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./42/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/binderfs") = 0 umount2("./42/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./42/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./42/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./42/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./42/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./42/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./42/file1/lost+found") = 0 umount2("./42/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./42/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./42/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file0/file0") = 0 umount2("./42/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file0/file1") = 0 umount2("./42/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./42/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./42/file1/file0") = 0 umount2("./42/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file1") = 0 umount2("./42/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file2") = 0 umount2("./42/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file3") = 0 umount2("./42/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./42/file1") = -1 EBUSY (Device or resource busy) umount2("./42/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./42/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./42") = 0 mkdir("./43", 0777) = 0 [ 30.078206][ T466] EXT4-fs (loop0): Ignoring removed orlov option [ 30.085212][ T466] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.096277][ T466] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program , child_tidptr=0x5555557ff650) = 470 ./strace-static-x86_64: Process 470 attached [pid 470] set_robust_list(0x5555557ff660, 24) = 0 [pid 470] chdir("./43") = 0 [pid 470] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 470] setpgid(0, 0) = 0 [pid 470] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 470] write(3, "1000", 4) = 4 [pid 470] close(3) = 0 [pid 470] symlink("/dev/binderfs", "./binderfs") = 0 [pid 470] write(1, "executing program\n", 18) = 18 [pid 470] memfd_create("syzkaller", 0) = 3 [pid 470] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 470] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 470] munmap(0x7f357c323000, 138412032) = 0 [pid 470] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 470] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 470] close(3) = 0 [pid 470] close(4) = 0 [pid 470] mkdir("./file1", 0777) = 0 [pid 470] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 470] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 470] chdir("./file1") = 0 [pid 470] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 470] ioctl(4, LOOP_CLR_FD) = 0 [pid 470] close(4) = 0 [pid 470] chdir("./file0") = 0 [pid 470] creat("./bus", 000) = 4 [pid 470] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 470] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 470] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 470] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 470] exit_group(0) = ? [pid 470] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=470, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./43", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./43/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/binderfs") = 0 umount2("./43/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./43/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./43/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./43/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./43/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./43/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./43/file1/lost+found") = 0 umount2("./43/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./43/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./43/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file0/file0") = 0 umount2("./43/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file0/file1") = 0 umount2("./43/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./43/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./43/file1/file0") = 0 umount2("./43/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file1") = 0 umount2("./43/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file2") = 0 umount2("./43/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file3") = 0 umount2("./43/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./43/file1") = -1 EBUSY (Device or resource busy) [ 30.255629][ T470] EXT4-fs (loop0): Ignoring removed orlov option [ 30.261884][ T470] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.275968][ T470] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./43/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./43/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./43") = 0 mkdir("./44", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 474 ./strace-static-x86_64: Process 474 attached [pid 474] set_robust_list(0x5555557ff660, 24) = 0 [pid 474] chdir("./44") = 0 [pid 474] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 474] setpgid(0, 0) = 0 [pid 474] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 474] write(3, "1000", 4) = 4 [pid 474] close(3) = 0 [pid 474] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 474] write(1, "executing program\n", 18) = 18 [pid 474] memfd_create("syzkaller", 0) = 3 [pid 474] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 474] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 474] munmap(0x7f357c323000, 138412032) = 0 [pid 474] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 474] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 474] close(3) = 0 [pid 474] close(4) = 0 [pid 474] mkdir("./file1", 0777) = 0 [pid 474] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 474] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 474] chdir("./file1") = 0 [pid 474] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 474] ioctl(4, LOOP_CLR_FD) = 0 [pid 474] close(4) = 0 [pid 474] chdir("./file0") = 0 [pid 474] creat("./bus", 000) = 4 [pid 474] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 474] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 474] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 474] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 474] exit_group(0) = ? [pid 474] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=474, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./44", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./44/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/binderfs") = 0 umount2("./44/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./44/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./44/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./44/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./44/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./44/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./44/file1/lost+found") = 0 umount2("./44/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./44/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./44/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file0/file0") = 0 umount2("./44/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file0/file1") = 0 umount2("./44/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./44/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./44/file1/file0") = 0 umount2("./44/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file1") = 0 umount2("./44/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file2") = 0 umount2("./44/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file3") = 0 umount2("./44/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./44/file1") = -1 EBUSY (Device or resource busy) [ 30.443448][ T474] EXT4-fs (loop0): Ignoring removed orlov option [ 30.449862][ T474] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.466263][ T474] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./44/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./44/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./44") = 0 mkdir("./45", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 479 ./strace-static-x86_64: Process 479 attached [pid 479] set_robust_list(0x5555557ff660, 24) = 0 [pid 479] chdir("./45") = 0 [pid 479] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 479] setpgid(0, 0) = 0 [pid 479] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 479] write(3, "1000", 4) = 4 [pid 479] close(3) = 0 [pid 479] symlink("/dev/binderfs", "./binderfs") = 0 [pid 479] write(1, "executing program\n", 18) = 18 [pid 479] memfd_create("syzkaller", 0) = 3 [pid 479] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 executing program [pid 479] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 479] munmap(0x7f357c323000, 138412032) = 0 [pid 479] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 479] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 479] close(3) = 0 [pid 479] close(4) = 0 [pid 479] mkdir("./file1", 0777) = 0 [pid 479] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 479] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 479] chdir("./file1") = 0 [pid 479] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 479] ioctl(4, LOOP_CLR_FD) = 0 [pid 479] close(4) = 0 [pid 479] chdir("./file0") = 0 [pid 479] creat("./bus", 000) = 4 [pid 479] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 479] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 479] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 479] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 479] exit_group(0) = ? [pid 479] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=479, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./45", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./45/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/binderfs") = 0 umount2("./45/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./45/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./45/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./45/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./45/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./45/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./45/file1/lost+found") = 0 umount2("./45/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./45/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./45/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file0/file0") = 0 umount2("./45/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file0/file1") = 0 umount2("./45/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./45/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./45/file1/file0") = 0 umount2("./45/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file1") = 0 umount2("./45/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file2") = 0 umount2("./45/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file3") = 0 umount2("./45/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./45/file1") = -1 EBUSY (Device or resource busy) [ 30.676455][ T479] EXT4-fs (loop0): Ignoring removed orlov option [ 30.682818][ T479] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.695941][ T479] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./45/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./45/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./45") = 0 mkdir("./46", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 483 ./strace-static-x86_64: Process 483 attached [pid 483] set_robust_list(0x5555557ff660, 24) = 0 [pid 483] chdir("./46") = 0 [pid 483] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 483] setpgid(0, 0) = 0 [pid 483] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 483] write(3, "1000", 4) = 4 [pid 483] close(3) = 0 [pid 483] symlink("/dev/binderfs", "./binderfs"executing program ) = 0 [pid 483] write(1, "executing program\n", 18) = 18 [pid 483] memfd_create("syzkaller", 0) = 3 [pid 483] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 483] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 483] munmap(0x7f357c323000, 138412032) = 0 [pid 483] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 483] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 483] close(3) = 0 [pid 483] close(4) = 0 [pid 483] mkdir("./file1", 0777) = 0 [pid 483] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 483] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 483] chdir("./file1") = 0 [pid 483] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 483] ioctl(4, LOOP_CLR_FD) = 0 [pid 483] close(4) = 0 [pid 483] chdir("./file0") = 0 [pid 483] creat("./bus", 000) = 4 [pid 483] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 483] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 483] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 483] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 483] exit_group(0) = ? [pid 483] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=483, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./46", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./46/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/binderfs") = 0 umount2("./46/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./46/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./46/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./46/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./46/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./46/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./46/file1/lost+found") = 0 umount2("./46/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./46/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./46/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file0/file0") = 0 umount2("./46/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file0/file1") = 0 umount2("./46/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./46/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./46/file1/file0") = 0 umount2("./46/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file1") = 0 umount2("./46/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file2") = 0 umount2("./46/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file3") = 0 umount2("./46/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./46/file1") = -1 EBUSY (Device or resource busy) [ 30.818454][ T483] EXT4-fs (loop0): Ignoring removed orlov option [ 30.824846][ T483] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.836164][ T483] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./46/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./46/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./46") = 0 mkdir("./47", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) executing program close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 487 ./strace-static-x86_64: Process 487 attached [pid 487] set_robust_list(0x5555557ff660, 24) = 0 [pid 487] chdir("./47") = 0 [pid 487] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 487] setpgid(0, 0) = 0 [pid 487] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 487] write(3, "1000", 4) = 4 [pid 487] close(3) = 0 [pid 487] symlink("/dev/binderfs", "./binderfs") = 0 [pid 487] write(1, "executing program\n", 18) = 18 [pid 487] memfd_create("syzkaller", 0) = 3 [pid 487] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 487] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 487] munmap(0x7f357c323000, 138412032) = 0 [pid 487] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 487] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 487] close(3) = 0 [pid 487] close(4) = 0 [pid 487] mkdir("./file1", 0777) = 0 [pid 487] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 487] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 487] chdir("./file1") = 0 [pid 487] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 487] ioctl(4, LOOP_CLR_FD) = 0 [pid 487] close(4) = 0 [pid 487] chdir("./file0") = 0 [pid 487] creat("./bus", 000) = 4 [pid 487] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 487] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 487] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 487] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 487] exit_group(0) = ? [pid 487] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=487, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./47", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./47/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/binderfs") = 0 umount2("./47/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./47/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./47/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./47/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./47/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./47/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./47/file1/lost+found") = 0 umount2("./47/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./47/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./47/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file0/file0") = 0 umount2("./47/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file0/file1") = 0 umount2("./47/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./47/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./47/file1/file0") = 0 umount2("./47/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file1") = 0 umount2("./47/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file2") = 0 umount2("./47/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file3") = 0 umount2("./47/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./47/file1") = -1 EBUSY (Device or resource busy) [ 30.965634][ T487] EXT4-fs (loop0): Ignoring removed orlov option [ 30.973829][ T487] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 30.986590][ T487] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./47/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./47/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./47") = 0 mkdir("./48", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) executing program close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 491 ./strace-static-x86_64: Process 491 attached [pid 491] set_robust_list(0x5555557ff660, 24) = 0 [pid 491] chdir("./48") = 0 [pid 491] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 491] setpgid(0, 0) = 0 [pid 491] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 491] write(3, "1000", 4) = 4 [pid 491] close(3) = 0 [pid 491] symlink("/dev/binderfs", "./binderfs") = 0 [pid 491] write(1, "executing program\n", 18) = 18 [pid 491] memfd_create("syzkaller", 0) = 3 [pid 491] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 491] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 491] munmap(0x7f357c323000, 138412032) = 0 [pid 491] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 491] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 491] close(3) = 0 [pid 491] close(4) = 0 [pid 491] mkdir("./file1", 0777) = 0 [pid 491] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 491] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 491] chdir("./file1") = 0 [pid 491] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 491] ioctl(4, LOOP_CLR_FD) = 0 [pid 491] close(4) = 0 [pid 491] chdir("./file0") = 0 [pid 491] creat("./bus", 000) = 4 [pid 491] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 491] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 491] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 491] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 491] exit_group(0) = ? [pid 491] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=491, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./48", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./48/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/binderfs") = 0 umount2("./48/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./48/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./48/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./48/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./48/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./48/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./48/file1/lost+found") = 0 umount2("./48/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./48/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./48/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file0/file0") = 0 umount2("./48/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file0/file1") = 0 umount2("./48/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./48/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./48/file1/file0") = 0 umount2("./48/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file1") = 0 umount2("./48/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file2") = 0 umount2("./48/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file3") = 0 umount2("./48/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./48/file1") = -1 EBUSY (Device or resource busy) [ 31.178271][ T491] EXT4-fs (loop0): Ignoring removed orlov option [ 31.184557][ T491] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.195915][ T491] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./48/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./48/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./48") = 0 mkdir("./49", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 495 ./strace-static-x86_64: Process 495 attached [pid 495] set_robust_list(0x5555557ff660, 24) = 0 [pid 495] chdir("./49") = 0 [pid 495] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 495] setpgid(0, 0) = 0 [pid 495] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 495] write(3, "1000", 4) = 4 [pid 495] close(3) = 0 [pid 495] symlink("/dev/binderfs", "./binderfs") = 0 [pid 495] write(1, "executing program\n", 18executing program ) = 18 [pid 495] memfd_create("syzkaller", 0) = 3 [pid 495] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 495] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 495] munmap(0x7f357c323000, 138412032) = 0 [pid 495] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 495] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 495] close(3) = 0 [pid 495] close(4) = 0 [pid 495] mkdir("./file1", 0777) = 0 [pid 495] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 495] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 495] chdir("./file1") = 0 [pid 495] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 495] ioctl(4, LOOP_CLR_FD) = 0 [pid 495] close(4) = 0 [pid 495] chdir("./file0") = 0 [pid 495] creat("./bus", 000) = 4 [pid 495] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 495] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 495] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 495] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 495] exit_group(0) = ? [pid 495] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=495, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./49", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./49/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/binderfs") = 0 umount2("./49/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./49/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./49/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./49/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./49/file1/lost+found") = 0 umount2("./49/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./49/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file0/file0") = 0 umount2("./49/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file0/file1") = 0 umount2("./49/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./49/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./49/file1/file0") = 0 umount2("./49/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file1") = 0 umount2("./49/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file2") = 0 umount2("./49/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file3") = 0 umount2("./49/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./49/file1") = -1 EBUSY (Device or resource busy) [ 31.290345][ T495] EXT4-fs (loop0): Ignoring removed orlov option [ 31.297021][ T495] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.306041][ T495] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./49/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./49/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./49") = 0 mkdir("./50", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 499 ./strace-static-x86_64: Process 499 attached [pid 499] set_robust_list(0x5555557ff660, 24) = 0 [pid 499] chdir("./50") = 0 [pid 499] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 499] setpgid(0, 0) = 0 [pid 499] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 499] write(3, "1000", 4) = 4 [pid 499] close(3) = 0 [pid 499] symlink("/dev/binderfs", "./binderfs") = 0 [pid 499] write(1, "executing program\n", 18) = 18 [pid 499] memfd_create("syzkaller", 0) = 3 [pid 499] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 499] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 499] munmap(0x7f357c323000, 138412032) = 0 [pid 499] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 499] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 499] close(3) = 0 [pid 499] close(4) = 0 [pid 499] mkdir("./file1", 0777) = 0 [pid 499] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 499] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 499] chdir("./file1") = 0 [pid 499] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 499] ioctl(4, LOOP_CLR_FD) = 0 [pid 499] close(4) = 0 [pid 499] chdir("./file0") = 0 [pid 499] creat("./bus", 000) = 4 [pid 499] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 499] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 499] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 499] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 499] exit_group(0) = ? [pid 499] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=499, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./50", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./50/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/binderfs") = 0 umount2("./50/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./50/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./50/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./50/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./50/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./50/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./50/file1/lost+found") = 0 umount2("./50/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./50/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./50/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/file1/file0/file0") = 0 umount2("./50/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/file1/file0/file1") = 0 umount2("./50/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./50/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./50/file1/file0") = 0 umount2("./50/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/file1/file1") = 0 umount2("./50/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/file1/file2") = 0 umount2("./50/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/file1/file3") = 0 umount2("./50/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./50/file1") = -1 EBUSY (Device or resource busy) [ 31.439223][ T499] EXT4-fs (loop0): Ignoring removed orlov option [ 31.447013][ T499] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.456411][ T499] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./50/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 rmdir("./50/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./50") = 0 mkdir("./51", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 504 ./strace-static-x86_64: Process 504 attached [pid 504] set_robust_list(0x5555557ff660, 24) = 0 [pid 504] chdir("./51") = 0 [pid 504] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 504] setpgid(0, 0) = 0 [pid 504] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 504] write(3, "1000", 4) = 4 [pid 504] close(3) = 0 [pid 504] symlink("/dev/binderfs", "./binderfs") = 0 [pid 504] write(1, "executing program\n", 18executing program ) = 18 [pid 504] memfd_create("syzkaller", 0) = 3 [pid 504] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 504] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 504] munmap(0x7f357c323000, 138412032) = 0 [pid 504] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 504] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 504] close(3) = 0 [pid 504] close(4) = 0 [pid 504] mkdir("./file1", 0777) = 0 [pid 504] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 504] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 504] chdir("./file1") = 0 [pid 504] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 504] ioctl(4, LOOP_CLR_FD) = 0 [pid 504] close(4) = 0 [pid 504] chdir("./file0") = 0 [pid 504] creat("./bus", 000) = 4 [pid 504] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 504] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 504] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 504] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 504] exit_group(0) = ? [pid 504] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=504, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./51", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./51/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/binderfs") = 0 umount2("./51/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./51/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./51/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./51/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./51/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./51/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./51/file1/lost+found") = 0 umount2("./51/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./51/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./51/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/file1/file0/file0") = 0 umount2("./51/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/file1/file0/file1") = 0 umount2("./51/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./51/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./51/file1/file0") = 0 umount2("./51/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/file1/file1") = 0 umount2("./51/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/file1/file2") = 0 umount2("./51/file1/file3", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/file3", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/file1/file3") = 0 umount2("./51/file1/file.cold", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1/file.cold", {st_mode=S_IFREG|0755, st_size=100, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/file1/file.cold") = 0 getdents64(4, 0x555555808730 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./51/file1") = -1 EBUSY (Device or resource busy) [ 31.622826][ T504] EXT4-fs (loop0): Ignoring removed orlov option [ 31.629603][ T504] EXT4-fs (loop0): Ignoring removed nomblk_io_submit option [ 31.646651][ T504] EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors=continue,noauto_da_alloc,nomblk_io_submit,,errors=continue umount2("./51/file1", MNT_FORCE|UMOUNT_NOFOLLOWexecuting program ) = 0 rmdir("./51/file1") = 0 getdents64(3, 0x5555558006f0 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./51") = 0 mkdir("./52", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557ff650) = 508 ./strace-static-x86_64: Process 508 attached [pid 508] set_robust_list(0x5555557ff660, 24) = 0 [pid 508] chdir("./52") = 0 [pid 508] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 508] setpgid(0, 0) = 0 [pid 508] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 508] write(3, "1000", 4) = 4 [pid 508] close(3) = 0 [pid 508] symlink("/dev/binderfs", "./binderfs") = 0 [pid 508] write(1, "executing program\n", 18) = 18 [pid 508] memfd_create("syzkaller", 0) = 3 [pid 508] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f357c323000 [pid 508] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 [pid 508] munmap(0x7f357c323000, 138412032) = 0 [pid 508] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 508] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 508] close(3) = 0 [pid 508] close(4) = 0 [pid 508] mkdir("./file1", 0777) = 0 [pid 508] mount("/dev/loop0", "./file1", "ext4", MS_RELATIME, "noblock_validity,bsddf,sysvgroups,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,errors="...) = 0 [pid 508] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 508] chdir("./file1") = 0 [pid 508] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 508] ioctl(4, LOOP_CLR_FD) = 0 [pid 508] close(4) = 0 [pid 508] chdir("./file0") = 0 [pid 508] creat("./bus", 000) = 4 [pid 508] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 508] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 508] mmap(0x20000000, 8388608, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 508] readv(-1, 0x20001f80, 3) = -1 EBADF (Bad file descriptor) [pid 508] exit_group(0) = ? [pid 508] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=508, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./52", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555558006f0 /* 4 entries */, 32768) = 112 umount2("./52/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./52/binderfs") = 0 umount2("./52/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./52/file1", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./52/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./52/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555555808730 /* 8 entries */, 32768) = 240 umount2("./52/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1/lost+found", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./52/file1/lost+found", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52/file1/lost+found", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=11264, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 2 entries */, 32768) = 48 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./52/file1/lost+found") = 0 umount2("./52/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1/file0", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./52/file1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52/file1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0755, st_size=60, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x555555810770 /* 5 entries */, 32768) = 136 umount2("./52/file1/file0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1/file0/file0", {st_mode=S_IFREG|0755, st_size=1050, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./52/file1/file0/file0") = 0 umount2("./52/file1/file0/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1/file0/file1", {st_mode=S_IFLNK|0777, st_size=39, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./52/file1/file0/file1") = 0 umount2("./52/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 umount2("./52/file1/file0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1/file0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./52/file1/file0/bus") = 0 getdents64(5, 0x555555810770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./52/file1/file0") = 0 umount2("./52/file1/file1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1/file1", {st_mode=S_IFREG|0755, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./52/file1/file1") = 0 umount2("./52/file1/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1/file2", {st_mode=S_IFREG|0755, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0