./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2982164804 <...> Warning: Permanently added '10.128.0.15' (ED25519) to the list of known hosts. execve("./syz-executor2982164804", ["./syz-executor2982164804"], 0x7ffc19a9b090 /* 10 vars */) = 0 brk(NULL) = 0x55557ea7b000 brk(0x55557ea7bd00) = 0x55557ea7bd00 arch_prctl(ARCH_SET_FS, 0x55557ea7b380) = 0 set_tid_address(0x55557ea7b650) = 288 set_robust_list(0x55557ea7b660, 24) = 0 rseq(0x55557ea7bca0, 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-executor2982164804", 4096) = 28 getrandom("\x15\xda\xa3\xc1\x4c\xfe\xfb\x81", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557ea7bd00 brk(0x55557ea9cd00) = 0x55557ea9cd00 brk(0x55557ea9d000) = 0x55557ea9d000 mprotect(0x7f3f89871000, 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.ahcoFf", 0700) = 0 chmod("./syzkaller.ahcoFf", 0777) = 0 chdir("./syzkaller.ahcoFf") = 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=0x55557ea7b650) = 290 ./strace-static-x86_64: Process 290 attached [ 22.755062][ T24] audit: type=1400 audit(1744992587.340:66): avc: denied { execmem } for pid=288 comm="syz-executor298" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.778577][ T24] audit: type=1400 audit(1744992587.370:67): avc: denied { read write } for pid=288 comm="syz-executor298" 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 [pid 290] set_robust_list(0x55557ea7b660, 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) = 0x7f3f813bd000 [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(0x7f3f813bd000, 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 [pid 290] close(4) = 0 [pid 290] mkdir("./bus", 0777) = 0 [ 22.806055][ T24] audit: type=1400 audit(1744992587.370:68): avc: denied { open } for pid=288 comm="syz-executor298" 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 [ 22.830283][ T24] audit: type=1400 audit(1744992587.380:69): avc: denied { ioctl } for pid=288 comm="syz-executor298" 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 [ 22.862438][ T24] audit: type=1400 audit(1744992587.450:70): avc: denied { mounton } for pid=290 comm="syz-executor298" path="/root/syzkaller.ahcoFf/0/bus" dev="sda1" ino=1930 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [pid 290] mount("/dev/loop0", "./bus", "vfat", 0, "") = 0 [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=1, si_stime=4} --- 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, 0x55557ea7c6f0 /* 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, 0x55557ea84730 /* 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, 0x55557ea8c770 /* 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, 0x55557ea947b0 /* 2 entries */, 32768) = 48 getdents64(6, 0x55557ea947b0 /* 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, 0x55557ea947b0 /* 2 entries */, 32768) = 48 getdents64(6, 0x55557ea947b0 /* 0 entries */, 32768) = 0 close(6) = 0 rmdir("./0/bus/file0/.incomplete") = 0 getdents64(5, 0x55557ea8c770 /* 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 [ 22.894816][ T24] audit: type=1400 audit(1744992587.480:71): avc: denied { mount } for pid=290 comm="syz-executor298" name="/" dev="loop0" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=filesystem permissive=1 [ 22.898711][ T290] incfs: ino conflict with backing FS 3 [ 22.917179][ T24] audit: type=1400 audit(1744992587.490:72): avc: denied { mounton } for pid=290 comm="syz-executor298" path="/root/syzkaller.ahcoFf/0/bus/bus" dev="loop0" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=dir permissive=1 [ 22.946570][ T24] audit: type=1400 audit(1744992587.510:73): avc: denied { mount } for pid=290 comm="syz-executor298" name="/" dev="incremental-fs" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 22.946606][ T288] ------------[ cut here ]------------ [ 22.969891][ T24] audit: type=1400 audit(1744992587.520:74): avc: denied { unmount } for pid=288 comm="syz-executor298" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=filesystem permissive=1 [ 22.975038][ T288] kernel BUG at fs/namei.c:2786! [ 22.994821][ T24] audit: type=1400 audit(1744992587.530:75): avc: denied { unmount } for pid=288 comm="syz-executor298" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 22.999790][ T288] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 23.025459][ T288] CPU: 0 PID: 288 Comm: syz-executor298 Not tainted 5.10.236-syzkaller #0 [ 23.033873][ T288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 23.043798][ T288] RIP: 0010:may_delete+0x755/0x760 [ 23.048713][ T288] Code: 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c db fd ff ff 4c 89 ef e8 9c 50 f4 ff e9 ce fd ff ff e8 42 b2 b6 ff 0f 0b e8 3b b2 b6 ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 [ 23.068160][ T288] RSP: 0018:ffffc90000987bb8 EFLAGS: 00010293 [ 23.074058][ T288] RAX: ffffffff81b40db5 RBX: ffff8881090fa7a0 RCX: ffff88811a4f93c0 [ 23.081871][ T288] RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000 [ 23.089681][ T288] RBP: ffffc90000987c38 R08: ffffffff81b406d3 R09: 0000000000000003 [ 23.097494][ T288] R10: fffff52000130f5c R11: dffffc0000000001 R12: 0000000000000001 [ 23.105307][ T288] R13: ffff8881090fb000 R14: ffff88811bbff300 R15: dffffc0000000000 [ 23.113142][ T288] FS: 000055557ea7b380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.122054][ T288] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.128477][ T288] CR2: 0000560b9373bd38 CR3: 000000011ab5f000 CR4: 00000000003506b0 [ 23.136291][ T288] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.144098][ T288] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.151908][ T288] Call Trace: [ 23.155058][ T288] vfs_rmdir+0x2c/0x3f0 [ 23.159139][ T288] incfs_kill_sb+0x108/0x220 [ 23.163567][ T288] deactivate_locked_super+0xad/0x110 [ 23.168757][ T288] deactivate_super+0xbe/0xf0 [ 23.173272][ T288] cleanup_mnt+0x45c/0x510 [ 23.177533][ T288] __cleanup_mnt+0x19/0x20 [ 23.181779][ T288] task_work_run+0x129/0x190 [ 23.186201][ T288] ptrace_notify+0x29e/0x350 [ 23.190622][ T288] ? do_notify_parent+0xa10/0xa10 [ 23.195484][ T288] ? user_path_at_empty+0x40/0x50 [ 23.200345][ T288] ? __x64_sys_umount+0x122/0x170 [ 23.205224][ T288] ? path_umount+0xea0/0xea0 [ 23.209633][ T288] syscall_exit_to_user_mode+0xf5/0x1a0 [ 23.215013][ T288] do_syscall_64+0x3d/0x40 [ 23.219271][ T288] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 23.224993][ T288] RIP: 0033:0x7f3f897fd447 [ 23.229247][ 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 [ 23.248688][ T288] RSP: 002b:00007ffcc2b281d8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 [ 23.256931][ T288] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3f897fd447 [ 23.264748][ T288] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcc2b28290 [ 23.272556][ T288] RBP: 00007ffcc2b28290 R08: 0000000000000000 R09: 0000000000000000 [ 23.280368][ T288] R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffcc2b29380 [ 23.288178][ T288] R13: 000055557ea84700 R14: 0000000000000001 R15: 431bde82d7b634db [ 23.295986][ T288] Modules linked in: [ 23.299917][ T288] ---[ end trace 690e836d07fabec6 ]--- [ 23.305120][ T288] RIP: 0010:may_delete+0x755/0x760 [ 23.310123][ T288] Code: 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c db fd ff ff 4c 89 ef e8 9c 50 f4 ff e9 ce fd ff ff e8 42 b2 b6 ff 0f 0b e8 3b b2 b6 ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 [ 23.329524][ T288] RSP: 0018:ffffc90000987bb8 EFLAGS: 00010293 [ 23.335394][ T288] RAX: ffffffff81b40db5 RBX: ffff8881090fa7a0 RCX: ffff88811a4f93c0 [ 23.343234][ T288] RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000 [ 23.351036][ T288] RBP: ffffc90000987c38 R08: ffffffff81b406d3 R09: 0000000000000003 [ 23.358861][ T288] R10: fffff52000130f5c R11: dffffc0000000001 R12: 0000000000000001 [ 23.366905][ T288] R13: ffff8881090fb000 R14: ffff88811bbff300 R15: dffffc0000000000 [ 23.374745][ T288] FS: 000055557ea7b380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.383495][ T288] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.389923][ T288] CR2: 0000560b9373bd38 CR3: 000000011ab5f000 CR4: 00000000003506b0 [ 23.397732][ T288] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.405524][ T288] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.413379][ T288] Kernel panic - not syncing: Fatal exception [ 23.419312][ T288] Kernel Offset: disabled [ 23.423407][ T288] Rebooting in 86400 seconds..