./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2993297451 <...> no interfaces have a carrier forked to background, child pid 5492 [ 70.777598][ T5493] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.794564][ T5493] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.104' (ED25519) to the list of known hosts. execve("./syz-executor2993297451", ["./syz-executor2993297451"], 0x7ffe34c81a40 /* 10 vars */) = 0 brk(NULL) = 0x55555d614000 brk(0x55555d614d00) = 0x55555d614d00 arch_prctl(ARCH_SET_FS, 0x55555d614380) = 0 set_tid_address(0x55555d614650) = 5828 set_robust_list(0x55555d614660, 24) = 0 rseq(0x55555d614ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2993297451", 4096) = 28 getrandom("\xc9\xff\x38\x03\x59\x52\xa4\xec", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555d614d00 brk(0x55555d635d00) = 0x55555d635d00 brk(0x55555d636000) = 0x55555d636000 mprotect(0x7fe7e58df000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555d614650) = 5829 ./strace-static-x86_64: Process 5829 attached [pid 5829] set_robust_list(0x55555d614660, 24) = 0 [pid 5829] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5829] getppid() = 0 [pid 5829] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5829] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5829] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5829] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5829] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5829] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5829] unshare(CLONE_NEWNS) = 0 [pid 5829] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5829] unshare(CLONE_NEWIPC) = 0 [pid 5829] unshare(CLONE_NEWCGROUP) = 0 [pid 5829] unshare(CLONE_NEWUTS) = 0 [pid 5829] unshare(CLONE_SYSVSEM) = 0 [pid 5829] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5829] write(3, "16777216", 8) = 8 [pid 5829] close(3) = 0 [pid 5829] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5829] write(3, "536870912", 9) = 9 [pid 5829] close(3) = 0 [pid 5829] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5829] write(3, "1024", 4) = 4 [pid 5829] close(3) = 0 [pid 5829] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5829] write(3, "8192", 4) = 4 [pid 5829] close(3) = 0 [pid 5829] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5829] write(3, "1024", 4) = 4 [pid 5829] close(3) = 0 [pid 5829] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5829] write(3, "1024", 4) = 4 [pid 5829] close(3) = 0 [pid 5829] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5829] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5829] close(3) = 0 [pid 5829] getpid() = 1 [pid 5829] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 102.465193][ T5829] [ 102.465193][ T5829] which lock already depends on the new lock. [ 102.465193][ T5829] [ 102.478049][ T5829] [ 102.478049][ T5829] the existing dependency chain (in reverse order) is: [ 102.487570][ T5829] [ 102.487570][ T5829] -> #2 (&type->s_umount_key#45){++++}-{4:4}: [ 102.496393][ T5829] lock_acquire+0x116/0x2f0 [ 102.501724][ T5829] down_read+0xb3/0xa50 [ 102.506967][ T5829] ocfs2_finish_quota_recovery+0x15e/0x2310 [ 102.514380][ T5829] ocfs2_complete_recovery+0x1977/0x2580 [ 102.521199][ T5829] process_scheduled_works+0xac3/0x18e0 [ 102.529048][ T5829] worker_thread+0x870/0xd50 [ 102.536526][ T5829] kthread+0x7b7/0x940 [ 102.541657][ T5829] ret_from_fork+0x4b/0x80 [ 102.548314][ T5829] ret_from_fork_asm+0x1a/0x30 [ 102.553825][ T5829] [ 102.553825][ T5829] -> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}: [ 102.565941][ T5829] lock_acquire+0x116/0x2f0 [ 102.571919][ T5829] process_scheduled_works+0x9e9/0x18e0 [ 102.578531][ T5829] worker_thread+0x870/0xd50 [ 102.583686][ T5829] kthread+0x7b7/0x940 [ 102.588602][ T5829] ret_from_fork+0x4b/0x80 [ 102.594499][ T5829] ret_from_fork_asm+0x1a/0x30 [ 102.600121][ T5829] [ 102.600121][ T5829] -> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}: [ 102.609219][ T5829] validate_chain+0xa69/0x24e0 [ 102.614834][ T5829] __lock_acquire+0xad5/0xd80 [ 102.620494][ T5829] lock_acquire+0x116/0x2f0 [ 102.626021][ T5829] touch_wq_lockdep_map+0xc7/0x170 [ 102.631955][ T5829] __flush_workqueue+0x14c/0x1280 [ 102.637705][ T5829] ocfs2_shutdown_local_alloc+0x10b/0xab0 [ 102.645012][ T5829] ocfs2_dismount_volume+0x204/0x910 [ 102.650949][ T5829] generic_shutdown_super+0x139/0x2d0 [ 102.657319][ T5829] kill_block_super+0x44/0x90 [ 102.662823][ T5829] deactivate_locked_super+0xc4/0x130 [ 102.669070][ T5829] cleanup_mnt+0x422/0x4c0 [ 102.674153][ T5829] task_work_run+0x251/0x310 [ 102.679418][ T5829] do_exit+0xa11/0x27f0 [ 102.684153][ T5829] do_group_exit+0x207/0x2c0 [ 102.689377][ T5829] __x64_sys_exit_group+0x3f/0x40 [ 102.695327][ T5829] x64_sys_call+0x26c3/0x26d0 [ 102.701375][ T5829] do_syscall_64+0xf3/0x230 [ 102.706714][ T5829] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 102.713555][ T5829] [ 102.713555][ T5829] other info that might help us debug this: [ 102.713555][ T5829] [ 102.724695][ T5829] Chain exists of: [ 102.724695][ T5829] (wq_completion)ocfs2_wq --> (work_completion)(&journal->j_recovery_work) --> &type->s_umount_key#45 [ 102.724695][ T5829] [ 102.742251][ T5829] Possible unsafe locking scenario: [ 102.742251][ T5829] [ 102.750486][ T5829] CPU0 CPU1 [ 102.756998][ T5829] ---- ---- [ 102.762564][ T5829] lock(&type->s_umount_key#45); [ 102.767658][ T5829] lock((work_completion)(&journal->j_recovery_work)); [ 102.777930][ T5829] lock(&type->s_umount_key#45); [ 102.786560][ T5829] lock((wq_completion)ocfs2_wq); [ 102.792726][ T5829] [ 102.792726][ T5829] *** DEADLOCK *** [ 102.792726][ T5829] [ 102.801971][ T5829] 1 lock held by syz-executor299/5829: [ 102.808245][ T5829] #0: ffff888035c020e0 (&type->s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 102.818899][ T5829] [ 102.818899][ T5829] stack backtrace: [ 102.825220][ T5829] CPU: 1 UID: 0 PID: 5829 Comm: syz-executor299 Not tainted 6.14.0-syzkaller-12886-ga1b5bd45d4ee #0 PREEMPT(full) [ 102.825246][ T5829] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 102.825261][ T5829] Call Trace: [ 102.825269][ T5829] [ 102.825276][ T5829] dump_stack_lvl+0x241/0x360 [ 102.825304][ T5829] ? __pfx_dump_stack_lvl+0x10/0x10 [ 102.825323][ T5829] ? __pfx__printk+0x10/0x10 [ 102.825341][ T5829] ? print_lock+0x171/0x1a0 [ 102.825359][ T5829] print_circular_bug+0x2e1/0x300 [ 102.825378][ T5829] check_noncircular+0x142/0x160 [ 102.825401][ T5829] validate_chain+0xa69/0x24e0 [ 102.825419][ T5829] ? _raw_spin_unlock_irqrestore+0xde/0x140 [ 102.825443][ T5829] ? dquot_disable+0x1158/0x1cf0 [ 102.825460][ T5829] ? ocfs2_disable_quotas+0x1bc/0x210 [ 102.825475][ T5829] ? kill_block_super+0x44/0x90 [ 102.825498][ T5829] ? debug_object_assert_init+0x30e/0x4d0 [ 102.825524][ T5829] __lock_acquire+0xad5/0xd80 [ 102.825541][ T5829] lock_acquire+0x116/0x2f0 [ 102.825554][ T5829] ? touch_wq_lockdep_map+0xb1/0x170 [ 102.825574][ T5829] ? touch_wq_lockdep_map+0xb1/0x170 [ 102.825591][ T5829] touch_wq_lockdep_map+0xc7/0x170 [ 102.825607][ T5829] ? touch_wq_lockdep_map+0xb1/0x170 [ 102.825625][ T5829] __flush_workqueue+0x14c/0x1280 [ 102.825642][ T5829] ? kfree+0x198/0x430 [ 102.825653][ T5829] ? ocfs2_local_free_info+0x8ba/0xa60 [ 102.825675][ T5829] ? __pfx___flush_workqueue+0x10/0x10 [ 102.825697][ T5829] ? work_grab_pending+0x4d6/0xb00 [ 102.825715][ T5829] ocfs2_shutdown_local_alloc+0x10b/0xab0 [ 102.825729][ T5829] ? __pfx_work_grab_pending+0x10/0x10 [ 102.825748][ T5829] ? __pfx_ocfs2_shutdown_local_alloc+0x10/0x10 [ 102.825762][ T5829] ? lockdep_hardirqs_on+0x9d/0x150 [ 102.825777][ T5829] ? enable_work+0x2e4/0x360 [ 102.825795][ T5829] ? __pfx_enable_work+0x10/0x10 [ 102.825813][ T5829] ? _atomic_dec_and_lock+0x9a/0x130 [ 102.825829][ T5829] ? iput+0x3be/0xa50 [ 102.825848][ T5829] ocfs2_dismount_volume+0x204/0x910 [ 102.825873][ T5829] ? __pfx_ocfs2_dismount_volume+0x10/0x10 [ 102.825896][ T5829] ? __pfx_evict_inodes+0x10/0x10 [ 102.825913][ T5829] ? __pfx_ocfs2_put_super+0x10/0x10 [ 102.825927][ T5829] generic_shutdown_super+0x139/0x2d0 [ 102.825947][ T5829] kill_block_super+0x44/0x90 [ 102.825968][ T5829] deactivate_locked_super+0xc4/0x130 [ 102.825988][ T5829] cleanup_mnt+0x422/0x4c0 [ 102.826012][ T5829] ? lockdep_hardirqs_on+0x9d/0x150 [ 102.826027][ T5829] task_work_run+0x251/0x310 [ 102.826050][ T5829] ? __pfx_task_work_run+0x10/0x10 [ 102.826070][ T5829] ? do_exit+0xa0c/0x27f0 [ 102.826087][ T5829] ? do_exit+0xa0c/0x27f0 [ 102.826104][ T5829] do_exit+0xa11/0x27f0 [ 102.826125][ T5829] ? __pfx_do_exit+0x10/0x10 [ 102.826152][ T5829] ? _raw_spin_unlock_irq+0x23/0x50 [ 102.826173][ T5829] ? lockdep_hardirqs_on+0x9d/0x150 [ 102.826188][ T5829] do_group_exit+0x207/0x2c0 [ 102.826208][ T5829] __x64_sys_exit_group+0x3f/0x40 [ 102.826226][ T5829] x64_sys_call+0x26c3/0x26d0 [ 102.826247][ T5829] do_syscall_64+0xf3/0x230 [ 102.826264][ T5829] ? clear_bhb_loop+0x45/0xa0 [ 102.826279][ T5829] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 102.826294][ T5829] RIP: 0033:0x7fe7e5864c09 [ 102.826314][ T5829] Code: Unable to access opcode bytes at 0x7fe7e5864bdf. [ 102.826321][ T5829] RSP: 002b:00007ffd5003f078 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 102.826337][ T5829] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe7e5864c09 [ 102.826347][ T5829] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [pid 5829] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5829, si_uid=0, si_status=1, si_utime=2 /* 0.02 s */, si_stime=39 /* 0.39 s */} --- exit_group(0) = ? [ 102.826356][ T5829] RBP: 00007fe7e58e52b0 R08: ffffffffffffffb8 R09: 0000000000004701 [ 102.826366][ T5829] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe7e58e52b0 [ 102.826375][ T5829] R13: 0000000000000000 R14: 00007fe7e58e6020 R15: 00007fe7e5833130 [ 102.826390][ T5829] [ 103.223729][ T839] cfg80211: failed to load regulatory.db [ 103.234690][ T5829] ocfs2: Unmounting device (7,0) on (node local) +++ exited with 0 +++