./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor510627014 <...> DUID 00:04:7b:a2:e0:73:6b:5f:a9:8e:d4:f6:53:82:b5:31:a7:5e forked to background, child pid 4660 [ 29.412466][ T4661] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.424784][ T4661] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.8' (ECDSA) to the list of known hosts. execve("./syz-executor510627014", ["./syz-executor510627014"], 0x7ffe16afad10 /* 10 vars */) = 0 brk(NULL) = 0x55555601a000 brk(0x55555601ac40) = 0x55555601ac40 arch_prctl(ARCH_SET_FS, 0x55555601a300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor510627014", 4096) = 27 brk(0x55555603bc40) = 0x55555603bc40 brk(0x55555603c000) = 0x55555603c000 mprotect(0x7fb171866000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555601a5d0) = 4993 ./strace-static-x86_64: Process 4993 attached [pid 4993] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 4993] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4993] setsid() = 1 [pid 4993] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 4993] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 4993] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 4993] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 4993] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 4993] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 4993] unshare(CLONE_NEWNS) = 0 [pid 4993] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 4993] unshare(CLONE_NEWIPC) = 0 [pid 4993] unshare(CLONE_NEWCGROUP) = 0 [pid 4993] unshare(CLONE_NEWUTS) = 0 [pid 4993] unshare(CLONE_SYSVSEM) = 0 [pid 4993] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4993] write(3, "16777216", 8) = 8 [pid 4993] close(3) = 0 [pid 4993] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 4993] write(3, "536870912", 9) = 9 [pid 4993] close(3) = 0 [pid 4993] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4993] write(3, "1024", 4) = 4 [pid 4993] close(3) = 0 [pid 4993] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4993] write(3, "8192", 4) = 4 [pid 4993] close(3) = 0 [pid 4993] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4993] write(3, "1024", 4) = 4 [pid 4993] close(3) = 0 [pid 4993] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 4993] write(3, "1024", 4) = 4 [pid 4993] close(3) = 0 [pid 4993] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 4993] write(3, "1024 1048576 500 1024", 21) = 21 [pid 4993] close(3) = 0 [pid 4993] getpid() = 1 [pid 4993] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0f b6 04 28 84 c0 0f 85 3d 05 00 00 4c 89 7c 24 18 4c 89 74 24 [ 57.825552][ T4993] RSP: 0018:ffffc90003a7fa60 EFLAGS: 00010a02 [ 57.831612][ T4993] RAX: 1ffff11018cfe6b3 RBX: ffff888073e61000 RCX: 0000000000000001 [ 57.839590][ T4993] RDX: 0000000000000000 RSI: ffffffff8b384420 RDI: ffff8880c67f3598 [ 57.847589][ T4993] RBP: ffffc90003a7fb48 R08: dffffc0000000000 R09: fffffbfff1cab8ce [ 57.855558][ T4993] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880c67f3580 [ 57.863521][ T4993] R13: dffffc0000000000 R14: 1ffff9200074ff58 R15: ffff8880227ee800 [ 57.871489][ T4993] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 57.880403][ T4993] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.886969][ T4993] CR2: ffffed1018cfe6b3 CR3: 0000000022923000 CR4: 00000000003506f0 [ 57.894975][ T4993] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.902953][ T4993] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.910929][ T4993] Call Trace: [ 57.914199][ T4993] [ 57.917124][ T4993] ? hook_inode_free_security+0xb0/0xb0 [ 57.922694][ T4993] ? udf_open_lvid+0x5b0/0x5b0 [ 57.927459][ T4993] ? iput+0x37e/0x8f0 [ 57.931438][ T4993] ? clear_inode+0x150/0x150 [ 57.936024][ T4993] udf_put_super+0xcd/0x160 [ 57.940521][ T4993] ? udf_free_in_core_inode+0x30/0x30 [ 57.945889][ T4993] generic_shutdown_super+0x134/0x340 [ 57.951271][ T4993] kill_block_super+0x84/0xf0 [ 57.955957][ T4993] deactivate_locked_super+0xa4/0x110 [ 57.961420][ T4993] cleanup_mnt+0x426/0x4c0 [ 57.965848][ T4993] ? _raw_spin_unlock_irq+0x23/0x50 [ 57.971043][ T4993] task_work_run+0x24a/0x300 [ 57.975639][ T4993] ? kasan_quarantine_put+0xd8/0x230 [ 57.981014][ T4993] ? task_work_cancel+0x2b0/0x2b0 [ 57.986029][ T4993] ? kmem_cache_free+0x297/0x520 [ 57.990960][ T4993] ? do_exit+0x68a/0x2290 [ 57.995278][ T4993] do_exit+0x68f/0x2290 [ 57.999429][ T4993] ? put_task_struct+0x80/0x80 [ 58.004177][ T4993] ? lockdep_hardirqs_on_prepare+0x43c/0x7a0 [ 58.010147][ T4993] ? print_irqtrace_events+0x220/0x220 [ 58.015610][ T4993] ? _raw_spin_unlock_irq+0x23/0x50 [ 58.020791][ T4993] ? lockdep_hardirqs_on+0x98/0x140 [ 58.025974][ T4993] do_group_exit+0x206/0x2c0 [ 58.030547][ T4993] __x64_sys_exit_group+0x3f/0x40 [ 58.035558][ T4993] do_syscall_64+0x41/0xc0 [ 58.039983][ T4993] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 58.045948][ T4993] RIP: 0033:0x7fb1717d7bc9 [ 58.050383][ T4993] Code: Unable to access opcode bytes at 0x7fb1717d7b9f. [ 58.057387][ T4993] RSP: 002b:00007fff70529258 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 58.065790][ T4993] RAX: ffffffffffffffda RBX: 00007fb17186c330 RCX: 00007fb1717d7bc9 [ 58.073751][ T4993] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 58.081711][ T4993] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fb171866e40 [ 58.089664][ T4993] R10: 00007fb171866e40 R11: 0000000000000246 R12: 00007fb17186c330 [ 58.097619][ T4993] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 58.105577][ T4993] [ 58.108580][ T4993] Modules linked in: [ 58.112455][ T4993] CR2: ffffed1018cfe6b3 [ 58.116596][ T4993] ---[ end trace 0000000000000000 ]--- [ 58.122029][ T4993] RIP: 0010:udf_close_lvid+0x14c/0x9a0 [ 58.127480][ T4993] Code: dc 49 83 c4 50 0f 84 f3 00 00 00 49 8d bf c0 00 00 00 48 89 7c 24 40 31 f6 e8 20 3f b7 07 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 3d 05 00 00 4c 89 7c 24 18 4c 89 74 24 [ 58.147067][ T4993] RSP: 0018:ffffc90003a7fa60 EFLAGS: 00010a02 [ 58.153118][ T4993] RAX: 1ffff11018cfe6b3 RBX: ffff888073e61000 RCX: 0000000000000001 [ 58.161078][ T4993] RDX: 0000000000000000 RSI: ffffffff8b384420 RDI: ffff8880c67f3598 [ 58.169032][ T4993] RBP: ffffc90003a7fb48 R08: dffffc0000000000 R09: fffffbfff1cab8ce [ 58.176989][ T4993] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880c67f3580 [ 58.184947][ T4993] R13: dffffc0000000000 R14: 1ffff9200074ff58 R15: ffff8880227ee800 [ 58.192901][ T4993] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 58.201812][ T4993] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.208380][ T4993] CR2: ffffed1018cfe6b3 CR3: 0000000022923000 CR4: 00000000003506f0 [ 58.216340][ T4993] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.224293][ T4993] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.232251][ T4993] Kernel panic - not syncing: Fatal exception [ 58.238516][ T4993] Kernel Offset: disabled [ 58.242829][ T4993] Rebooting in 86400 seconds..