./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3744683218 <...> Warning: Permanently added '10.128.1.64' (ED25519) to the list of known hosts. execve("./syz-executor3744683218", ["./syz-executor3744683218"], 0x7ffec85b9960 /* 10 vars */) = 0 brk(NULL) = 0x5555901f1000 brk(0x5555901f1d00) = 0x5555901f1d00 arch_prctl(ARCH_SET_FS, 0x5555901f1380) = 0 set_tid_address(0x5555901f1650) = 5818 set_robust_list(0x5555901f1660, 24) = 0 rseq(0x5555901f1ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3744683218", 4096) = 28 getrandom("\xb3\x92\x81\x2d\xdc\x1d\x3f\x4d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555901f1d00 brk(0x555590212d00) = 0x555590212d00 brk(0x555590213000) = 0x555590213000 mprotect(0x7fbd92d2e000, 16384, PROT_READ) = 0 mmap(0x3ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3ffffffff000 mmap(0x400000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400000000000 mmap(0x400001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400001000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5819 attached , child_tidptr=0x5555901f1650) = 5819 [pid 5819] set_robust_list(0x5555901f1660, 24) = 0 [pid 5819] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5819] getppid() = 0 [pid 5819] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5819] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5819] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5819] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5819] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5819] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5819] unshare(CLONE_NEWNS) = 0 [pid 5819] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5819] unshare(CLONE_NEWIPC) = 0 [pid 5819] unshare(CLONE_NEWCGROUP) = 0 [pid 5819] unshare(CLONE_NEWUTS) = 0 [pid 5819] unshare(CLONE_SYSVSEM) = 0 [pid 5819] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5819] write(3, "16777216", 8) = 8 [pid 5819] close(3) = 0 [pid 5819] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5819] write(3, "536870912", 9) = 9 [pid 5819] close(3) = 0 [pid 5819] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5819] write(3, "1024", 4) = 4 [pid 5819] close(3) = 0 [pid 5819] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5819] write(3, "8192", 4) = 4 [pid 5819] close(3) = 0 [pid 5819] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5819] write(3, "1024", 4) = 4 [pid 5819] close(3) = 0 [pid 5819] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5819] write(3, "1024", 4) = 4 [pid 5819] close(3) = 0 [pid 5819] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5819] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5819] close(3) = 0 [pid 5819] getpid() = 1 [pid 5819] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 67.551650][ T5819] [ 67.551650][ T5819] which lock already depends on the new lock. [ 67.551650][ T5819] [ 67.562034][ T5819] [ 67.562034][ T5819] the existing dependency chain (in reverse order) is: [ 67.571028][ T5819] [ 67.571028][ T5819] -> #2 (&type->s_umount_key#45){++++}-{4:4}: [ 67.579277][ T5819] lock_acquire+0x1ed/0x550 [ 67.584290][ T5819] down_read+0xb1/0xa40 [ 67.588961][ T5819] ocfs2_finish_quota_recovery+0x15c/0x22a0 [ 67.595369][ T5819] ocfs2_complete_recovery+0x17c1/0x25c0 [ 67.601511][ T5819] process_scheduled_works+0xa66/0x1840 [ 67.607560][ T5819] worker_thread+0x870/0xd30 [ 67.612653][ T5819] kthread+0x7a9/0x920 [ 67.617231][ T5819] ret_from_fork+0x4b/0x80 [ 67.622152][ T5819] ret_from_fork_asm+0x1a/0x30 [ 67.627423][ T5819] [ 67.627423][ T5819] -> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}: [ 67.637574][ T5819] lock_acquire+0x1ed/0x550 [ 67.642586][ T5819] process_scheduled_works+0x994/0x1840 [ 67.648637][ T5819] worker_thread+0x870/0xd30 [ 67.653821][ T5819] kthread+0x7a9/0x920 [ 67.658403][ T5819] ret_from_fork+0x4b/0x80 [ 67.663324][ T5819] ret_from_fork_asm+0x1a/0x30 [ 67.668593][ T5819] [ 67.668593][ T5819] -> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}: [ 67.676921][ T5819] validate_chain+0x18ef/0x5920 [ 67.682282][ T5819] __lock_acquire+0x1397/0x2100 [ 67.687639][ T5819] lock_acquire+0x1ed/0x550 [ 67.692649][ T5819] touch_wq_lockdep_map+0xc7/0x170 [ 67.698270][ T5819] __flush_workqueue+0x14a/0x1280 [ 67.703801][ T5819] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 67.710046][ T5819] ocfs2_dismount_volume+0x202/0x910 [ 67.715854][ T5819] generic_shutdown_super+0x139/0x2d0 [ 67.721741][ T5819] kill_block_super+0x44/0x90 [ 67.726931][ T5819] deactivate_locked_super+0xc4/0x130 [ 67.732814][ T5819] cleanup_mnt+0x41f/0x4b0 [ 67.737746][ T5819] task_work_run+0x24f/0x310 [ 67.742852][ T5819] do_exit+0xa2a/0x28e0 [ 67.747515][ T5819] do_group_exit+0x207/0x2c0 [ 67.752610][ T5819] __x64_sys_exit_group+0x3f/0x40 [ 67.758140][ T5819] x64_sys_call+0x26a8/0x26b0 [ 67.763413][ T5819] do_syscall_64+0xf3/0x230 [ 67.768425][ T5819] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 67.774826][ T5819] [ 67.774826][ T5819] other info that might help us debug this: [ 67.774826][ T5819] [ 67.785045][ T5819] Chain exists of: [ 67.785045][ T5819] (wq_completion)ocfs2_wq --> (work_completion)(&journal->j_recovery_work) --> &type->s_umount_key#45 [ 67.785045][ T5819] [ 67.801899][ T5819] Possible unsafe locking scenario: [ 67.801899][ T5819] [ 67.809430][ T5819] CPU0 CPU1 [ 67.814782][ T5819] ---- ---- [ 67.820130][ T5819] lock(&type->s_umount_key#45); [ 67.825149][ T5819] lock((work_completion)(&journal->j_recovery_work)); [ 67.834592][ T5819] lock(&type->s_umount_key#45); [ 67.842218][ T5819] lock((wq_completion)ocfs2_wq); [ 67.847318][ T5819] [ 67.847318][ T5819] *** DEADLOCK *** [ 67.847318][ T5819] [ 67.855449][ T5819] 1 lock held by syz-executor374/5819: [ 67.860887][ T5819] #0: ffff88802fe2a0e0 (&type->s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 67.871066][ T5819] [ 67.871066][ T5819] stack backtrace: [ 67.876951][ T5819] CPU: 1 UID: 0 PID: 5819 Comm: syz-executor374 Not tainted 6.14.0-rc1-syzkaller-00181-g7ee983c850b4 #0 [ 67.876967][ T5819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 67.876978][ T5819] Call Trace: [ 67.876985][ T5819] [ 67.876992][ T5819] dump_stack_lvl+0x241/0x360 [ 67.877017][ T5819] ? __pfx_dump_stack_lvl+0x10/0x10 [ 67.877035][ T5819] ? __pfx__printk+0x10/0x10 [ 67.877055][ T5819] print_circular_bug+0x13a/0x1b0 [ 67.877075][ T5819] check_noncircular+0x36a/0x4a0 [ 67.877094][ T5819] ? __pfx_check_noncircular+0x10/0x10 [ 67.877111][ T5819] ? lockdep_lock+0x123/0x2b0 [ 67.877126][ T5819] ? __pfx_stack_trace_save+0x10/0x10 [ 67.877140][ T5819] validate_chain+0x18ef/0x5920 [ 67.877157][ T5819] ? __lock_acquire+0x1397/0x2100 [ 67.877177][ T5819] ? __pfx_validate_chain+0x10/0x10 [ 67.877202][ T5819] ? debug_object_assert_init+0x2dd/0x4b0 [ 67.877216][ T5819] ? do_raw_spin_lock+0x14f/0x370 [ 67.877228][ T5819] ? __pfx_lock_release+0x10/0x10 [ 67.877244][ T5819] ? mark_lock+0x9a/0x360 [ 67.877259][ T5819] __lock_acquire+0x1397/0x2100 [ 67.877275][ T5819] ? kfree+0x196/0x430 [ 67.877289][ T5819] ? ocfs2_dismount_volume+0x1bd/0x910 [ 67.877303][ T5819] lock_acquire+0x1ed/0x550 [ 67.877316][ T5819] ? touch_wq_lockdep_map+0xb1/0x170 [ 67.877333][ T5819] ? __pfx_lock_acquire+0x10/0x10 [ 67.877346][ T5819] ? __asan_memset+0x23/0x50 [ 67.877364][ T5819] ? lockdep_init_map_type+0xa1/0x910 [ 67.877378][ T5819] ? __pfx_lockdep_init_map_type+0x10/0x10 [ 67.877392][ T5819] ? __lock_acquire+0x1397/0x2100 [ 67.877409][ T5819] ? touch_wq_lockdep_map+0xb1/0x170 [ 67.877423][ T5819] touch_wq_lockdep_map+0xc7/0x170 [ 67.877436][ T5819] ? touch_wq_lockdep_map+0xb1/0x170 [ 67.877450][ T5819] __flush_workqueue+0x14a/0x1280 [ 67.877464][ T5819] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 67.877482][ T5819] ? __pfx___flush_workqueue+0x10/0x10 [ 67.877500][ T5819] ? mark_lock+0x9a/0x360 [ 67.877516][ T5819] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 67.877530][ T5819] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 67.877546][ T5819] ? __pfx_ocfs2_shutdown_local_alloc+0x10/0x10 [ 67.877559][ T5819] ? lockdep_hardirqs_on+0x99/0x150 [ 67.877574][ T5819] ? enable_work+0x2e3/0x360 [ 67.877589][ T5819] ? __pfx_enable_work+0x10/0x10 [ 67.877603][ T5819] ? _atomic_dec_and_lock+0x9a/0x130 [ 67.877619][ T5819] ? iput+0x3be/0xa50 [ 67.877636][ T5819] ocfs2_dismount_volume+0x202/0x910 [ 67.877650][ T5819] ? __pfx_ocfs2_dismount_volume+0x10/0x10 [ 67.877662][ T5819] ? __pfx_evict_inodes+0x10/0x10 [ 67.877677][ T5819] ? __pfx_ocfs2_put_super+0x10/0x10 [ 67.877690][ T5819] generic_shutdown_super+0x139/0x2d0 [ 67.877709][ T5819] kill_block_super+0x44/0x90 [ 67.877721][ T5819] deactivate_locked_super+0xc4/0x130 [ 67.877738][ T5819] cleanup_mnt+0x41f/0x4b0 [ 67.877755][ T5819] ? lockdep_hardirqs_on+0x99/0x150 [ 67.877770][ T5819] task_work_run+0x24f/0x310 [ 67.877788][ T5819] ? __pfx_task_work_run+0x10/0x10 [ 67.877803][ T5819] ? do_exit+0xa25/0x28e0 [ 67.877823][ T5819] ? do_exit+0xa25/0x28e0 [ 67.877838][ T5819] do_exit+0xa2a/0x28e0 [ 67.877854][ T5819] ? __pfx_do_exit+0x10/0x10 [ 67.877866][ T5819] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 67.877882][ T5819] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 67.877898][ T5819] ? _raw_spin_unlock_irq+0x23/0x50 [ 67.877911][ T5819] ? lockdep_hardirqs_on+0x99/0x150 [ 67.877926][ T5819] do_group_exit+0x207/0x2c0 [ 67.877942][ T5819] __x64_sys_exit_group+0x3f/0x40 [ 67.877957][ T5819] x64_sys_call+0x26a8/0x26b0 [ 67.877969][ T5819] do_syscall_64+0xf3/0x230 [ 67.877986][ T5819] ? clear_bhb_loop+0x35/0x90 [ 67.878003][ T5819] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 67.878019][ T5819] RIP: 0033:0x7fbd92cb3c09 [ 67.878034][ T5819] Code: Unable to access opcode bytes at 0x7fbd92cb3bdf. [ 67.878040][ T5819] RSP: 002b:00007ffd6fb43c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 67.878053][ T5819] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fbd92cb3c09 [ 67.878062][ T5819] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 67.878069][ T5819] RBP: 00007fbd92d342b0 R08: ffffffffffffffb8 R09: 0000000000004701 [ 67.878079][ T5819] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbd92d342b0 [pid 5819] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5819, si_uid=0, si_status=1, si_utime=2 /* 0.02 s */, si_stime=29 /* 0.29 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 67.878086][ T5819] R13: 0000000000000000 R14: 00007fbd92d35020