./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1655996815 <...> Warning: Permanently added '10.128.0.103' (ED25519) to the list of known hosts. execve("./syz-executor1655996815", ["./syz-executor1655996815"], 0x7fffdd8cc260 /* 10 vars */) = 0 brk(NULL) = 0x55557287b000 brk(0x55557287bd00) = 0x55557287bd00 arch_prctl(ARCH_SET_FS, 0x55557287b380) = 0 set_tid_address(0x55557287b650) = 362 set_robust_list(0x55557287b660, 24) = 0 rseq(0x55557287bca0, 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-executor1655996815", 4096) = 28 getrandom("\x72\x1c\x1e\x8d\x0b\x39\x91\x1f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557287bd00 brk(0x55557289cd00) = 0x55557289cd00 brk(0x55557289d000) = 0x55557289d000 mprotect(0x7f8357e64000, 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.B7aTC7", 0700) = 0 chmod("./syzkaller.B7aTC7", 0777) = 0 chdir("./syzkaller.B7aTC7") = 0 mkdir("./0", 0777) = 0 [ 29.581756][ T23] audit: type=1400 audit(1738136056.610:66): avc: denied { execmem } for pid=362 comm="syz-executor165" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 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=0x55557287b650) = 364 ./strace-static-x86_64: Process 364 attached [pid 364] set_robust_list(0x55557287b660, 24) = 0 [pid 364] chdir("./0") = 0 [pid 364] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 364] setpgid(0, 0) = 0 [pid 364] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 364] write(3, "1000", 4) = 4 [pid 364] close(3) = 0 [pid 364] symlink("/dev/binderfs", "./binderfs") = 0 [pid 364] write(1, "executing program\n", 18executing program ) = 18 [pid 364] memfd_create("syzkaller", 0) = 3 [pid 364] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f834f9b0000 [ 29.617892][ T23] audit: type=1400 audit(1738136056.640:67): avc: denied { read write } for pid=362 comm="syz-executor165" name="loop0" dev="devtmpfs" ino=130 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 29.642447][ T23] audit: type=1400 audit(1738136056.650:68): avc: denied { open } for pid=362 comm="syz-executor165" path="/dev/loop0" dev="devtmpfs" ino=130 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 364] 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 364] munmap(0x7f834f9b0000, 138412032) = 0 [pid 364] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 364] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 364] close(3) = 0 [pid 364] close(4) = 0 [pid 364] mkdir("./bus", 0777) = 0 [ 29.666702][ T23] audit: type=1400 audit(1738136056.680:69): avc: denied { ioctl } for pid=362 comm="syz-executor165" path="/dev/loop0" dev="devtmpfs" ino=130 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 364] mount("/dev/loop0", "./bus", "vfat", 0, "") = 0 [pid 364] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 364] chdir("./bus") = 0 [pid 364] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 364] ioctl(4, LOOP_CLR_FD) = 0 [pid 364] close(4) = 0 [pid 364] mkdir("./bus", 000) = 0 [pid 364] mount("./bus", "./bus", "incremental-fs", 0, NULL) = 0 [pid 364] exit_group(0) = ? [pid 364] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=364, si_uid=0, si_status=0, si_utime=1, si_stime=4} --- [ 29.715186][ T23] audit: type=1400 audit(1738136056.740:70): avc: denied { mounton } for pid=364 comm="syz-executor165" path="/root/syzkaller.B7aTC7/0/bus" dev="sda1" ino=1930 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 29.746142][ T23] audit: type=1400 audit(1738136056.770:71): avc: denied { mount } for pid=364 comm="syz-executor165" name="/" dev="loop0" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=filesystem permissive=1 [ 29.750532][ T364] incfs: ino conflict with backing FS 3 restart_syscall(<... resuming interrupted clone ...>) = 0 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, 0x55557287c6f0 /* 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, 0x555572884730 /* 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, 0x55557288c770 /* 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, 0x5555728947b0 /* 2 entries */, 32768) = 48 getdents64(6, 0x5555728947b0 /* 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, 0x5555728947b0 /* 2 entries */, 32768) = 48 getdents64(6, 0x5555728947b0 /* 0 entries */, 32768) = 0 close(6) = 0 rmdir("./0/bus/file0/.incomplete") = 0 getdents64(5, 0x55557288c770 /* 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 [ 29.775962][ T23] audit: type=1400 audit(1738136056.780:72): avc: denied { mounton } for pid=364 comm="syz-executor165" path="/root/syzkaller.B7aTC7/0/bus/bus" dev="loop0" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=dir permissive=1 [ 29.800498][ T362] ------------[ cut here ]------------ [ 29.800728][ T23] audit: type=1400 audit(1738136056.800:73): avc: denied { mount } for pid=364 comm="syz-executor165" name="/" dev="incremental-fs" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 29.805769][ T362] kernel BUG at fs/namei.c:2894! [ 29.805798][ T362] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 29.805809][ T362] CPU: 0 PID: 362 Comm: syz-executor165 Not tainted 5.4.289-syzkaller-00025-g49530c73f82d #0 [ 29.805814][ T362] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 29.805842][ T362] RIP: 0010:may_delete+0x750/0x760 [ 29.805853][ T362] Code: 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c e8 fd ff ff 4c 89 e7 e8 41 0d f6 ff e9 db fd ff ff e8 17 23 c6 ff 0f 0b e8 10 23 c6 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 56 53 48 89 fb [ 29.805860][ T362] RSP: 0018:ffff8881eeb8fb28 EFLAGS: 00010293 [ 29.805870][ T362] RAX: ffffffff819e2760 RBX: ffff8881dca26678 RCX: ffff8881f30c2f40 [ 29.805876][ T362] RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000 [ 29.805884][ T362] RBP: ffff8881dca2bf10 R08: ffffffff819e2088 R09: 0000000000000003 [ 29.805892][ T362] R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881dca26660 [ 29.805898][ T362] R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8881dcae12d8 [ 29.805915][ T362] FS: 000055557287b380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 29.828848][ T23] audit: type=1400 audit(1738136056.810:74): avc: denied { unmount } for pid=362 comm="syz-executor165" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=filesystem permissive=1 [ 29.833548][ T362] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.839479][ T23] audit: type=1400 audit(1738136056.820:75): avc: denied { unmount } for pid=362 comm="syz-executor165" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 29.849429][ T362] CR2: 0000557ace7a0b08 CR3: 00000001e073a000 CR4: 00000000003406b0 [ 29.849438][ T362] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.849443][ T362] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.849452][ T362] Call Trace: [ 30.010176][ T362] ? __die+0xb4/0x100 [ 30.013983][ T362] ? die+0x26/0x50 [ 30.017541][ T362] ? do_trap+0x1e7/0x340 [ 30.021624][ T362] ? may_delete+0x750/0x760 [ 30.025960][ T362] ? may_delete+0x750/0x760 [ 30.030301][ T362] ? do_invalid_op+0xfb/0x110 [ 30.034815][ T362] ? may_delete+0x750/0x760 [ 30.039156][ T362] ? invalid_op+0x1e/0x30 [ 30.043322][ T362] ? may_delete+0x78/0x760 [ 30.047570][ T362] ? may_delete+0x750/0x760 [ 30.051912][ T362] ? may_delete+0x750/0x760 [ 30.056250][ T362] ? may_delete+0x750/0x760 [ 30.060598][ T362] vfs_rmdir+0x29/0x3c0 [ 30.064591][ T362] incfs_kill_sb+0x105/0x200 [ 30.069010][ T362] deactivate_locked_super+0xa8/0x110 [ 30.074221][ T362] deactivate_super+0x1e2/0x2a0 [ 30.078910][ T362] ? deactivate_locked_super+0x110/0x110 [ 30.084372][ T362] ? fast_dput+0x7a/0x280 [ 30.088539][ T362] cleanup_mnt+0x44e/0x500 [ 30.092794][ T362] task_work_run+0x140/0x170 [ 30.097222][ T362] ptrace_notify+0x29e/0x350 [ 30.101649][ T362] ? do_notify_parent+0xa10/0xa10 [ 30.106505][ T362] ? ksys_umount+0x3a6/0x410 [ 30.110932][ T362] ? namespace_unlock+0x4e0/0x4e0 [ 30.115795][ T362] ? fpu__clear+0x3c0/0x3c0 [ 30.120132][ T362] syscall_slow_exit_work+0x167/0x400 [ 30.125342][ T362] do_syscall_64+0x19d/0x1c0 [ 30.129766][ T362] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 30.135503][ T362] RIP: 0033:0x7f8357df03c7 [ 30.139748][ T362] 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 [ 30.159187][ T362] RSP: 002b:00007ffe665afef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 30.167680][ T362] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8357df03c7 [ 30.175482][ T362] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe665affb0 [ 30.183294][ T362] RBP: 00007ffe665affb0 R08: 0000000000000000 R09: 0000000000000000 [ 30.191109][ T362] R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffe665b10a0 [ 30.198920][ T362] R13: 0000555572884700 R14: 0000000000000001 R15: 431bde82d7b634db [ 30.206738][ T362] Modules linked in: [ 30.211203][ T362] ---[ end trace 099c1a89d980b25d ]--- [ 30.216481][ T362] RIP: 0010:may_delete+0x750/0x760 [ 30.221689][ T362] Code: 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c e8 fd ff ff 4c 89 e7 e8 41 0d f6 ff e9 db fd ff ff e8 17 23 c6 ff 0f 0b e8 10 23 c6 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 56 53 48 89 fb [ 30.241675][ T362] RSP: 0018:ffff8881eeb8fb28 EFLAGS: 00010293 [ 30.247539][ T362] RAX: ffffffff819e2760 RBX: ffff8881dca26678 RCX: ffff8881f30c2f40 [ 30.255392][ T362] RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000 [ 30.263185][ T362] RBP: ffff8881dca2bf10 R08: ffffffff819e2088 R09: 0000000000000003 [ 30.271003][ T362] R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881dca26660 [ 30.278801][ T362] R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8881dcae12d8 [ 30.286596][ T362] FS: 000055557287b380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 30.295396][ T362] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.301803][ T362] CR2: 0000557ace7a0b08 CR3: 00000001e073a000 CR4: 00000000003406b0 [ 30.309634][ T362] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.317407][ T362] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.325254][ T362] Kernel panic - not syncing: Fatal exception [ 30.331379][ T362] Kernel Offset: disabled [ 30.335533][ T362] Rebooting in 86400 seconds..