./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1474022990 <...> Warning: Permanently added '10.128.0.253' (ED25519) to the list of known hosts. execve("./syz-executor1474022990", ["./syz-executor1474022990"], 0x7ffe42a3c4b0 /* 10 vars */) = 0 brk(NULL) = 0x5555832d9000 brk(0x5555832d9d00) = 0x5555832d9d00 arch_prctl(ARCH_SET_FS, 0x5555832d9380) = 0 set_tid_address(0x5555832d9650) = 288 set_robust_list(0x5555832d9660, 24) = 0 rseq(0x5555832d9ca0, 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-executor1474022990", 4096) = 28 getrandom("\xee\x04\xa1\x91\xc2\xc8\xe8\xb7", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555832d9d00 brk(0x5555832fad00) = 0x5555832fad00 brk(0x5555832fb000) = 0x5555832fb000 mprotect(0x7fd527eff000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 mkdir("./syzkaller.QQiubH", 0700) = 0 chmod("./syzkaller.QQiubH", 0777) = 0 chdir("./syzkaller.QQiubH") = 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=0x5555832d9650) = 290 ./strace-static-x86_64: Process 290 attached [pid 290] set_robust_list(0x5555832d9660, 24) = 0 [pid 290] chdir("./0") = 0 [pid 290] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 290] setpgid(0, 0) = 0 [pid 290] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 290] write(3, "1000", 4) = 4 [pid 290] close(3) = 0 [pid 290] symlink("/dev/binderfs", "./binderfs") = 0 [pid 290] write(1, "executing program\n", 18executing program ) = 18 [pid 290] memfd_create("syzkaller", 0) = 3 [pid 290] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd51fa4b000 [ 23.314331][ T30] audit: type=1400 audit(1754765458.500:64): avc: denied { execmem } for pid=288 comm="syz-executor147" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.334322][ T30] audit: type=1400 audit(1754765458.520:65): avc: denied { read write } for pid=288 comm="syz-executor147" name="loop0" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 290] write(3, "\xeb\x3c\x90\x6d\x6b\x66\x73\x2e\x66\x61\x74\x00\x02\x01\x01\x00\x04\x70\x05\x00\x04\xf8\x20\x00\x20\x00\x02\x00\x03\x00\x00\x00\x00\x00\x00\x00\x80\x00\x29\x56\xd7\xe1\x1d\x53\x59\x5a\x4b\x41\x4c\x4c\x45\x52\x20\x20\x46\x41\x54\x31\x36\x20\x20\x20\x0e\x1f\xbe\x5b\x7c\xac\x22\xc0\x74\x0b\x56\xb4\x0e\xbb\x07\x00\xcd\x10\x5e\xeb\xf0\x32\xe4\xcd\x16\xcd\x19\xeb\xfe\xab\x00\x69\x73\x20\x69\x73\x20\x6e"..., 4194304) = 4194304 [pid 290] munmap(0x7fd51fa4b000, 138412032) = 0 [pid 290] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 290] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 290] close(3) = 0 [ 23.358726][ T30] audit: type=1400 audit(1754765458.520:66): avc: denied { open } for pid=288 comm="syz-executor147" path="/dev/loop0" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 23.382985][ T30] audit: type=1400 audit(1754765458.520:67): avc: denied { ioctl } for pid=288 comm="syz-executor147" path="/dev/loop0" dev="devtmpfs" ino=116 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 23.386861][ T290] loop0: detected capacity change from 0 to 8192 [pid 290] close(4) = 0 [pid 290] mkdir("./bus", 0777) = 0 [pid 290] mount("/dev/loop0", "./bus", "vfat", 0, "") = 0 [ 23.460573][ T30] audit: type=1400 audit(1754765458.650:68): avc: denied { mounton } for pid=290 comm="syz-executor147" path="/root/syzkaller.QQiubH/0/bus" dev="sda1" ino=2027 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [pid 290] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 290] chdir("./bus") = 0 [pid 290] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 290] ioctl(4, LOOP_CLR_FD) = 0 [pid 290] close(4) = 0 [pid 290] mkdir("./bus", 000) = 0 [pid 290] mount("./bus", "./bus", "incremental-fs", 0, NULL) = 0 [pid 290] exit_group(0) = ? [pid 290] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=290, si_uid=0, si_status=0, si_utime=0, si_stime=8} --- 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, 0x5555832da6f0 /* 4 entries */, 32768) = 104 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/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./0/bus", {st_mode=S_IFDIR|0700, st_size=44544, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./0/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=44544, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x5555832e2730 /* 28 entries */, 32768) = 856 umount2("./0/bus/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/bus/file0", {st_mode=S_IFDIR|0700, st_size=512, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/bus/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/bus/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 5 newfstatat(5, "", {st_mode=S_IFDIR|0700, st_size=512, ...}, AT_EMPTY_PATH) = 0 getdents64(5, 0x5555832ea770 /* 4 entries */, 32768) = 112 umount2("./0/bus/file0/.index", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/bus/file0/.index", {st_mode=S_IFDIR|0700, st_size=512, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/bus/file0/.index", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/bus/file0/.index", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 6 newfstatat(6, "", {st_mode=S_IFDIR|0700, st_size=512, ...}, AT_EMPTY_PATH) = 0 getdents64(6, 0x5555832f27b0 /* 2 entries */, 32768) = 48 getdents64(6, 0x5555832f27b0 /* 0 entries */, 32768) = 0 close(6) = 0 rmdir("./0/bus/file0/.index") = 0 umount2("./0/bus/file0/.incomplete", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/bus/file0/.incomplete", {st_mode=S_IFDIR|0700, st_size=512, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/bus/file0/.incomplete", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/bus/file0/.incomplete", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 6 newfstatat(6, "", {st_mode=S_IFDIR|0700, st_size=512, ...}, AT_EMPTY_PATH) = 0 getdents64(6, 0x5555832f27b0 /* 2 entries */, 32768) = 48 getdents64(6, 0x5555832f27b0 /* 0 entries */, 32768) = 0 close(6) = 0 rmdir("./0/bus/file0/.incomplete") = 0 getdents64(5, 0x5555832ea770 /* 0 entries */, 32768) = 0 close(5) = 0 rmdir("./0/bus/file0") = 0 umount2("\x2e\x2f\x30\x2f\x62\x75\x73\x2f\x66\x69\x6c\x65\x3f\x01\x3f\x3f\x3f\x3f\x3f\x3f\x3f", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "\x2e\x2f\x30\x2f\x62\x75\x73\x2f\x66\x69\x6c\x65\x3f\x01\x3f\x3f\x3f\x3f\x3f\x3f\x3f", {st_mode=S_IFREG|0700, st_size=10, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("\x2e\x2f\x30\x2f\x62\x75\x73\x2f\x66\x69\x6c\x65\x3f\x01\x3f\x3f\x3f\x3f\x3f\x3f\x3f") = 0 umount2("./0/bus/file2", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/bus/file2", {st_mode=S_IFREG|0700, st_size=9000, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/bus/file2") = 0 [ 23.494590][ T30] audit: type=1400 audit(1754765458.680:69): avc: denied { mount } for pid=290 comm="syz-executor147" name="/" dev="loop0" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=filesystem permissive=1 [ 23.509176][ T290] incfs: ino conflict with backing FS 3 [ 23.517254][ T30] audit: type=1400 audit(1754765458.690:70): avc: denied { mounton } for pid=290 comm="syz-executor147" path="/root/syzkaller.QQiubH/0/bus/bus" dev="loop0" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=dir permissive=1 [ 23.546822][ T30] audit: type=1400 audit(1754765458.720:71): avc: denied { mount } for pid=290 comm="syz-executor147" name="/" dev="incremental-fs" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 23.546987][ T288] ------------[ cut here ]------------ [ 23.570536][ T30] audit: type=1400 audit(1754765458.720:72): avc: denied { unmount } for pid=288 comm="syz-executor147" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=filesystem permissive=1 [ 23.595957][ T30] audit: type=1400 audit(1754765458.730:73): avc: denied { unmount } for pid=288 comm="syz-executor147" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 23.596704][ T288] kernel BUG at fs/namei.c:2933! [ 23.621563][ T288] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 23.627632][ T288] CPU: 0 PID: 288 Comm: syz-executor147 Not tainted 5.15.189-syzkaller-android13-5.15.189_r00 #0 [ 23.638118][ T288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 23.648188][ T288] RIP: 0010:may_delete+0x701/0x710 [ 23.653338][ T288] Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 84 fe ff ff 48 89 df e8 f0 51 f5 ff e9 77 fe ff ff e8 26 d7 b6 ff 0f 0b e8 1f d7 b6 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 56 53 [ 23.672943][ T288] RSP: 0018:ffffc90000a07b90 EFLAGS: 00010293 [ 23.679005][ T288] RAX: ffffffff81b1d8b1 RBX: ffff888100416bb0 RCX: ffff88811b3abb40 [ 23.686976][ T288] RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000 [ 23.694976][ T288] RBP: ffffc90000a07bf8 R08: 0000000000000004 R09: 0000000000000003 [ 23.702946][ T288] R10: fffff52000140f54 R11: 1ffff92000140f54 R12: dffffc0000000000 [ 23.710917][ T288] R13: 0000000000000001 R14: ffff888120e569c0 R15: 1ffff11020082d76 [ 23.718918][ T288] FS: 00005555832d9380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.727845][ T288] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.734421][ T288] CR2: 0000558e6ea8e748 CR3: 00000001245eb000 CR4: 00000000003506b0 [ 23.742393][ T288] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.750367][ T288] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.758330][ T288] Call Trace: [ 23.761604][ T288] [ 23.764530][ T288] vfs_rmdir+0x32/0x460 [ 23.768683][ T288] incfs_kill_sb+0x105/0x220 [ 23.773271][ T288] deactivate_locked_super+0xa0/0x100 [ 23.778659][ T288] deactivate_super+0xaf/0xe0 [ 23.783492][ T288] cleanup_mnt+0x446/0x500 [ 23.787909][ T288] __cleanup_mnt+0x19/0x20 [ 23.792330][ T288] task_work_run+0x127/0x190 [ 23.796914][ T288] ptrace_notify+0x212/0x250 [ 23.801502][ T288] ? do_notify_parent+0x800/0x800 [ 23.806842][ T288] ? user_path_at_empty+0x161/0x1c0 [ 23.812061][ T288] ? __x64_sys_umount+0x125/0x160 [ 23.817103][ T288] ? path_umount+0xf90/0xf90 [ 23.821702][ T288] syscall_exit_work+0x87/0x160 [ 23.826606][ T288] syscall_exit_to_user_mode_prepare+0x1c/0x20 [ 23.832754][ T288] syscall_exit_to_user_mode+0xd/0x30 [ 23.838130][ T288] do_syscall_64+0x58/0xa0 [ 23.842537][ T288] ? clear_bhb_loop+0x50/0xa0 [ 23.847210][ T288] ? clear_bhb_loop+0x50/0xa0 [ 23.851883][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 23.857771][ T288] RIP: 0033:0x7fd527e8b4c7 [ 23.862176][ T288] Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 [ 23.881791][ T288] RSP: 002b:00007ffda40d1078 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 [ 23.890199][ T288] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd527e8b4c7 [ 23.898159][ T288] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffda40d1130 [ 23.906120][ T288] RBP: 00007ffda40d1130 R08: 0000000000000000 R09: 0000000000000000 [ 23.914084][ T288] R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffda40d2220 [ 23.922049][ T288] R13: 00005555832e2700 R14: 0000000000000001 R15: 431bde82d7b634db [ 23.930026][ T288] [ 23.933032][ T288] Modules linked in: [ 23.937010][ T288] ---[ end trace e480b71ce700ab28 ]--- [ 23.942540][ T288] RIP: 0010:may_delete+0x701/0x710 [ 23.947656][ T288] Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 84 fe ff ff 48 89 df e8 f0 51 f5 ff e9 77 fe ff ff e8 26 d7 b6 ff 0f 0b e8 1f d7 b6 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 56 53 [ 23.967281][ T288] RSP: 0018:ffffc90000a07b90 EFLAGS: 00010293 [ 23.973370][ T288] RAX: ffffffff81b1d8b1 RBX: ffff888100416bb0 RCX: ffff88811b3abb40 [ 23.981359][ T288] RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000 [ 23.989370][ T288] RBP: ffffc90000a07bf8 R08: 0000000000000004 R09: 0000000000000003 [ 23.997337][ T288] R10: fffff52000140f54 R11: 1ffff92000140f54 R12: dffffc0000000000 [ 24.005336][ T288] R13: 0000000000000001 R14: ffff888120e569c0 R15: 1ffff11020082d76 [ 24.013417][ T288] FS: 00005555832d9380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 24.022422][ T288] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.029024][ T288] CR2: 0000558e6ea8e748 CR3: 00000001245eb000 CR4: 00000000003506b0 [ 24.037105][ T288] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.045087][ T288] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.053099][ T288] Kernel panic - not syncing: Fatal exception [ 24.059432][ T288] Kernel Offset: disabled [ 24.063858][ T288] Rebooting in 86400 seconds..