./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3815399293 <...> Warning: Permanently added '10.128.0.183' (ED25519) to the list of known hosts. execve("./syz-executor3815399293", ["./syz-executor3815399293"], 0x7fff6a731910 /* 10 vars */) = 0 brk(NULL) = 0x55556e099000 brk(0x55556e099d00) = 0x55556e099d00 arch_prctl(ARCH_SET_FS, 0x55556e099380) = 0 set_tid_address(0x55556e099650) = 5821 set_robust_list(0x55556e099660, 24) = 0 rseq(0x55556e099ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3815399293", 4096) = 28 getrandom("\x35\x82\xba\x5b\xd6\x58\x23\xb6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556e099d00 brk(0x55556e0bad00) = 0x55556e0bad00 brk(0x55556e0bb000) = 0x55556e0bb000 mprotect(0x7fa7663e2000, 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 5822 attached , child_tidptr=0x55556e099650) = 5822 [pid 5822] set_robust_list(0x55556e099660, 24) = 0 [pid 5822] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5822] getppid() = 0 [pid 5822] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5822] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5822] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5822] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5822] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5822] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5822] unshare(CLONE_NEWNS) = 0 [pid 5822] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5822] unshare(CLONE_NEWIPC) = 0 [pid 5822] unshare(CLONE_NEWCGROUP) = 0 [pid 5822] unshare(CLONE_NEWUTS) = 0 [pid 5822] unshare(CLONE_SYSVSEM) = 0 [pid 5822] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] write(3, "16777216", 8) = 8 [pid 5822] close(3) = 0 [pid 5822] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] write(3, "536870912", 9) = 9 [pid 5822] close(3) = 0 [pid 5822] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] write(3, "1024", 4) = 4 [pid 5822] close(3) = 0 [pid 5822] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] write(3, "8192", 4) = 4 [pid 5822] close(3) = 0 [pid 5822] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] write(3, "1024", 4) = 4 [pid 5822] close(3) = 0 [pid 5822] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] write(3, "1024", 4) = 4 [pid 5822] close(3) = 0 [pid 5822] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5822] close(3) = 0 [pid 5822] getpid() = 1 [pid 5822] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 68.343326][ T5822] [ 68.343326][ T5822] which lock already depends on the new lock. [ 68.343326][ T5822] [ 68.353728][ T5822] [ 68.353728][ T5822] the existing dependency chain (in reverse order) is: [ 68.362759][ T5822] [ 68.362759][ T5822] -> #2 (&type->s_umount_key#45){++++}-{4:4}: [ 68.371024][ T5822] lock_acquire+0x1ed/0x550 [ 68.376048][ T5822] down_read+0xb1/0xa40 [ 68.380732][ T5822] ocfs2_finish_quota_recovery+0x15c/0x22a0 [ 68.387150][ T5822] ocfs2_complete_recovery+0x17c1/0x25c0 [ 68.393312][ T5822] process_scheduled_works+0xa66/0x1840 [ 68.399375][ T5822] worker_thread+0x870/0xd30 [ 68.404588][ T5822] kthread+0x7a9/0x920 [ 68.409182][ T5822] ret_from_fork+0x4b/0x80 [ 68.414129][ T5822] ret_from_fork_asm+0x1a/0x30 [ 68.419415][ T5822] [ 68.419415][ T5822] -> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}: [ 68.429593][ T5822] lock_acquire+0x1ed/0x550 [ 68.434617][ T5822] process_scheduled_works+0x994/0x1840 [ 68.440677][ T5822] worker_thread+0x870/0xd30 [ 68.445780][ T5822] kthread+0x7a9/0x920 [ 68.450367][ T5822] ret_from_fork+0x4b/0x80 [ 68.455304][ T5822] ret_from_fork_asm+0x1a/0x30 [ 68.460587][ T5822] [ 68.460587][ T5822] -> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}: [ 68.468926][ T5822] validate_chain+0x18ef/0x5920 [ 68.474300][ T5822] __lock_acquire+0x1397/0x2100 [ 68.479667][ T5822] lock_acquire+0x1ed/0x550 [ 68.484687][ T5822] touch_wq_lockdep_map+0xc7/0x170 [ 68.490318][ T5822] __flush_workqueue+0x14a/0x1280 [ 68.495877][ T5822] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 68.502121][ T5822] ocfs2_dismount_volume+0x202/0x910 [ 68.507926][ T5822] generic_shutdown_super+0x139/0x2d0 [ 68.513822][ T5822] kill_block_super+0x44/0x90 [ 68.519016][ T5822] deactivate_locked_super+0xc4/0x130 [ 68.524904][ T5822] cleanup_mnt+0x41f/0x4b0 [ 68.529843][ T5822] task_work_run+0x24f/0x310 [ 68.534953][ T5822] do_exit+0xa2a/0x28e0 [ 68.539626][ T5822] do_group_exit+0x207/0x2c0 [ 68.544731][ T5822] __x64_sys_exit_group+0x3f/0x40 [ 68.550275][ T5822] x64_sys_call+0x26a8/0x26b0 [ 68.555470][ T5822] do_syscall_64+0xf3/0x230 [ 68.560492][ T5822] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 68.566912][ T5822] [ 68.566912][ T5822] other info that might help us debug this: [ 68.566912][ T5822] [ 68.577136][ T5822] Chain exists of: [ 68.577136][ T5822] (wq_completion)ocfs2_wq --> (work_completion)(&journal->j_recovery_work) --> &type->s_umount_key#45 [ 68.577136][ T5822] [ 68.594003][ T5822] Possible unsafe locking scenario: [ 68.594003][ T5822] [ 68.601461][ T5822] CPU0 CPU1 [ 68.606827][ T5822] ---- ---- [ 68.612187][ T5822] lock(&type->s_umount_key#45); [ 68.617219][ T5822] lock((work_completion)(&journal->j_recovery_work)); [ 68.626669][ T5822] lock(&type->s_umount_key#45); [ 68.634218][ T5822] lock((wq_completion)ocfs2_wq); [ 68.639325][ T5822] [ 68.639325][ T5822] *** DEADLOCK *** [ 68.639325][ T5822] [ 68.647469][ T5822] 1 lock held by syz-executor381/5822: [ 68.652917][ T5822] #0: ffff888058ae60e0 (&type->s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 68.663114][ T5822] [ 68.663114][ T5822] stack backtrace: [ 68.669014][ T5822] CPU: 0 UID: 0 PID: 5822 Comm: syz-executor381 Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0 [ 68.669030][ T5822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 68.669041][ T5822] Call Trace: [ 68.669050][ T5822] [ 68.669057][ T5822] dump_stack_lvl+0x241/0x360 [ 68.669080][ T5822] ? __pfx_dump_stack_lvl+0x10/0x10 [ 68.669098][ T5822] ? __pfx__printk+0x10/0x10 [ 68.669118][ T5822] print_circular_bug+0x13a/0x1b0 [ 68.669137][ T5822] check_noncircular+0x36a/0x4a0 [ 68.669154][ T5822] ? __lock_acquire+0x1397/0x2100 [ 68.669169][ T5822] ? __pfx_check_noncircular+0x10/0x10 [ 68.669186][ T5822] ? queued_spin_lock_slowpath+0x42/0x50 [ 68.669201][ T5822] ? lockdep_lock+0x1b0/0x2b0 [ 68.669215][ T5822] ? mark_lock+0x9a/0x360 [ 68.669231][ T5822] validate_chain+0x18ef/0x5920 [ 68.669254][ T5822] ? __pfx_validate_chain+0x10/0x10 [ 68.669278][ T5822] ? debug_object_assert_init+0x2dd/0x4b0 [ 68.669292][ T5822] ? do_raw_spin_lock+0x14f/0x370 [ 68.669303][ T5822] ? __pfx_lock_release+0x10/0x10 [ 68.669319][ T5822] ? mark_lock+0x9a/0x360 [ 68.669339][ T5822] __lock_acquire+0x1397/0x2100 [ 68.669354][ T5822] ? kfree+0x196/0x430 [ 68.669369][ T5822] ? ocfs2_dismount_volume+0x1bd/0x910 [ 68.669383][ T5822] lock_acquire+0x1ed/0x550 [ 68.669397][ T5822] ? touch_wq_lockdep_map+0xb1/0x170 [ 68.669414][ T5822] ? __pfx_lock_acquire+0x10/0x10 [ 68.669427][ T5822] ? __asan_memset+0x23/0x50 [ 68.669444][ T5822] ? lockdep_init_map_type+0xa1/0x910 [ 68.669458][ T5822] ? __pfx_lockdep_init_map_type+0x10/0x10 [ 68.669472][ T5822] ? __lock_acquire+0x1397/0x2100 [ 68.669489][ T5822] ? touch_wq_lockdep_map+0xb1/0x170 [ 68.669502][ T5822] touch_wq_lockdep_map+0xc7/0x170 [ 68.669515][ T5822] ? touch_wq_lockdep_map+0xb1/0x170 [ 68.669530][ T5822] __flush_workqueue+0x14a/0x1280 [ 68.669544][ T5822] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 68.669561][ T5822] ? __pfx___flush_workqueue+0x10/0x10 [ 68.669579][ T5822] ? mark_lock+0x9a/0x360 [ 68.669595][ T5822] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 68.669609][ T5822] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 68.669625][ T5822] ? __pfx_ocfs2_shutdown_local_alloc+0x10/0x10 [ 68.669637][ T5822] ? lockdep_hardirqs_on+0x99/0x150 [ 68.669653][ T5822] ? enable_work+0x2e3/0x360 [ 68.669668][ T5822] ? __pfx_enable_work+0x10/0x10 [ 68.669682][ T5822] ? _atomic_dec_and_lock+0x9a/0x130 [ 68.669698][ T5822] ? iput+0x3be/0xa50 [ 68.669715][ T5822] ocfs2_dismount_volume+0x202/0x910 [ 68.669729][ T5822] ? __pfx_ocfs2_dismount_volume+0x10/0x10 [ 68.669741][ T5822] ? __pfx_evict_inodes+0x10/0x10 [ 68.669757][ T5822] ? __pfx_ocfs2_put_super+0x10/0x10 [ 68.669769][ T5822] generic_shutdown_super+0x139/0x2d0 [ 68.669788][ T5822] kill_block_super+0x44/0x90 [ 68.669800][ T5822] deactivate_locked_super+0xc4/0x130 [ 68.669817][ T5822] cleanup_mnt+0x41f/0x4b0 [ 68.669834][ T5822] ? lockdep_hardirqs_on+0x99/0x150 [ 68.669849][ T5822] task_work_run+0x24f/0x310 [ 68.669867][ T5822] ? __pfx_task_work_run+0x10/0x10 [ 68.669882][ T5822] ? do_exit+0xa25/0x28e0 [ 68.669896][ T5822] ? do_exit+0xa25/0x28e0 [ 68.669911][ T5822] do_exit+0xa2a/0x28e0 [ 68.669927][ T5822] ? __pfx_do_exit+0x10/0x10 [ 68.669939][ T5822] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 68.669954][ T5822] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 68.669971][ T5822] ? _raw_spin_unlock_irq+0x23/0x50 [ 68.669985][ T5822] ? lockdep_hardirqs_on+0x99/0x150 [ 68.670000][ T5822] do_group_exit+0x207/0x2c0 [ 68.670016][ T5822] __x64_sys_exit_group+0x3f/0x40 [ 68.670030][ T5822] x64_sys_call+0x26a8/0x26b0 [ 68.670043][ T5822] do_syscall_64+0xf3/0x230 [ 68.670060][ T5822] ? clear_bhb_loop+0x35/0x90 [ 68.670077][ T5822] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 68.670098][ T5822] RIP: 0033:0x7fa766367c09 [ 68.670111][ T5822] Code: Unable to access opcode bytes at 0x7fa766367bdf. [ 68.670117][ T5822] RSP: 002b:00007fffcab9df68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 68.670131][ T5822] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fa766367c09 [ 68.670140][ T5822] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 68.670147][ T5822] RBP: 00007fa7663e82b0 R08: ffffffffffffffb8 R09: 0000000000004701 [ 68.670156][ T5822] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa7663e82b0 [pid 5822] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5822, si_uid=0, si_status=1, si_utime=1 /* 0.01 s */, si_stime=28 /* 0.28 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 68.670