./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor926051625 <...> Warning: Permanently added '10.128.0.251' (ED25519) to the list of known hosts. execve("./syz-executor926051625", ["./syz-executor926051625"], 0x7ffe67584960 /* 10 vars */) = 0 brk(NULL) = 0x555565b79000 brk(0x555565b79d00) = 0x555565b79d00 arch_prctl(ARCH_SET_FS, 0x555565b79380) = 0 set_tid_address(0x555565b79650) = 5826 set_robust_list(0x555565b79660, 24) = 0 rseq(0x555565b79ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor926051625", 4096) = 27 getrandom("\x1d\xf6\xe8\x4f\x64\xc9\x24\xb7", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555565b79d00 brk(0x555565b9ad00) = 0x555565b9ad00 brk(0x555565b9b000) = 0x555565b9b000 mprotect(0x7f7560328000, 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./strace-static-x86_64: Process 5827 attached [pid 5827] set_robust_list(0x555565b79660, 24 [pid 5826] <... clone resumed>, child_tidptr=0x555565b79650) = 5827 [pid 5827] <... set_robust_list resumed>) = 0 [pid 5827] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5827] getppid() = 0 [pid 5827] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5827] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5827] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5827] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5827] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5827] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5827] unshare(CLONE_NEWNS) = 0 [pid 5827] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5827] unshare(CLONE_NEWIPC) = 0 [pid 5827] unshare(CLONE_NEWCGROUP) = 0 [pid 5827] unshare(CLONE_NEWUTS) = 0 [pid 5827] unshare(CLONE_SYSVSEM) = 0 [pid 5827] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5827] write(3, "16777216", 8) = 8 [pid 5827] close(3) = 0 [pid 5827] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5827] write(3, "536870912", 9) = 9 [pid 5827] close(3) = 0 [pid 5827] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5827] write(3, "1024", 4) = 4 [pid 5827] close(3) = 0 [pid 5827] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5827] write(3, "8192", 4) = 4 [pid 5827] close(3) = 0 [pid 5827] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5827] write(3, "1024", 4) = 4 [pid 5827] close(3) = 0 [pid 5827] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5827] write(3, "1024", 4) = 4 [pid 5827] close(3) = 0 [pid 5827] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5827] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5827] close(3) = 0 [pid 5827] getpid() = 1 [pid 5827] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 85.879061][ T5827] [ 85.879061][ T5827] which lock already depends on the new lock. [ 85.879061][ T5827] [ 85.889475][ T5827] [ 85.889475][ T5827] the existing dependency chain (in reverse order) is: [ 85.898771][ T5827] [ 85.898771][ T5827] -> #2 (&type->s_umount_key#45){++++}-{4:4}: [ 85.907063][ T5827] lock_acquire+0x1ed/0x550 [ 85.912111][ T5827] down_read+0xb1/0xa40 [ 85.916823][ T5827] ocfs2_finish_quota_recovery+0x15c/0x22a0 [ 85.923263][ T5827] ocfs2_complete_recovery+0x17c1/0x25c0 [ 85.929490][ T5827] process_scheduled_works+0xa66/0x1840 [ 85.936066][ T5827] worker_thread+0x870/0xd30 [ 85.941753][ T5827] kthread+0x7a9/0x920 [ 85.947518][ T5827] ret_from_fork+0x4b/0x80 [ 85.952492][ T5827] ret_from_fork_asm+0x1a/0x30 [ 85.958512][ T5827] [ 85.958512][ T5827] -> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}: [ 85.969612][ T5827] lock_acquire+0x1ed/0x550 [ 85.974674][ T5827] process_scheduled_works+0x994/0x1840 [ 85.980771][ T5827] worker_thread+0x870/0xd30 [ 85.986001][ T5827] kthread+0x7a9/0x920 [ 85.990626][ T5827] ret_from_fork+0x4b/0x80 [ 85.995591][ T5827] ret_from_fork_asm+0x1a/0x30 [ 86.000906][ T5827] [ 86.000906][ T5827] -> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}: [ 86.009280][ T5827] validate_chain+0x18ef/0x5920 [ 86.014759][ T5827] __lock_acquire+0x1397/0x2100 [ 86.020177][ T5827] lock_acquire+0x1ed/0x550 [ 86.025221][ T5827] touch_wq_lockdep_map+0xc7/0x170 [ 86.030891][ T5827] __flush_workqueue+0x14a/0x1280 [ 86.036505][ T5827] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 86.042767][ T5827] ocfs2_dismount_volume+0x202/0x910 [ 86.048807][ T5827] generic_shutdown_super+0x139/0x2d0 [ 86.054757][ T5827] kill_block_super+0x44/0x90 [ 86.059997][ T5827] deactivate_locked_super+0xc4/0x130 [ 86.065912][ T5827] cleanup_mnt+0x41f/0x4b0 [ 86.070863][ T5827] task_work_run+0x24f/0x310 [ 86.075988][ T5827] do_exit+0xa2a/0x28e0 [ 86.080694][ T5827] do_group_exit+0x207/0x2c0 [ 86.085942][ T5827] __x64_sys_exit_group+0x3f/0x40 [ 86.091527][ T5827] x64_sys_call+0x26a8/0x26b0 [ 86.096736][ T5827] do_syscall_64+0xf3/0x230 [ 86.101771][ T5827] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.108198][ T5827] [ 86.108198][ T5827] other info that might help us debug this: [ 86.108198][ T5827] [ 86.118433][ T5827] Chain exists of: [ 86.118433][ T5827] (wq_completion)ocfs2_wq --> (work_completion)(&journal->j_recovery_work) --> &type->s_umount_key#45 [ 86.118433][ T5827] [ 86.135345][ T5827] Possible unsafe locking scenario: [ 86.135345][ T5827] [ 86.142796][ T5827] CPU0 CPU1 [ 86.148157][ T5827] ---- ---- [ 86.153519][ T5827] lock(&type->s_umount_key#45); [ 86.158559][ T5827] lock((work_completion)(&journal->j_recovery_work)); [ 86.168063][ T5827] lock(&type->s_umount_key#45); [ 86.175655][ T5827] lock((wq_completion)ocfs2_wq); [ 86.180785][ T5827] [ 86.180785][ T5827] *** DEADLOCK *** [ 86.180785][ T5827] [ 86.188960][ T5827] 1 lock held by syz-executor926/5827: [ 86.194442][ T5827] #0: ffff88807ec240e0 (&type->s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 86.204689][ T5827] [ 86.204689][ T5827] stack backtrace: [ 86.210606][ T5827] CPU: 1 UID: 0 PID: 5827 Comm: syz-executor926 Not tainted 6.13.0-syzkaller-09793-g69b8923f5003 #0 [ 86.210625][ T5827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 86.210638][ T5827] Call Trace: [ 86.210647][ T5827] [ 86.210654][ T5827] dump_stack_lvl+0x241/0x360 [ 86.210685][ T5827] ? __pfx_dump_stack_lvl+0x10/0x10 [ 86.210714][ T5827] ? __pfx__printk+0x10/0x10 [ 86.210739][ T5827] print_circular_bug+0x13a/0x1b0 [ 86.210764][ T5827] check_noncircular+0x36a/0x4a0 [ 86.210785][ T5827] ? __lock_acquire+0x1397/0x2100 [ 86.210804][ T5827] ? __pfx_check_noncircular+0x10/0x10 [ 86.210826][ T5827] ? lockdep_lock+0x123/0x2b0 [ 86.210844][ T5827] ? mark_lock+0x9a/0x360 [ 86.210865][ T5827] validate_chain+0x18ef/0x5920 [ 86.210894][ T5827] ? __pfx_validate_chain+0x10/0x10 [ 86.210924][ T5827] ? debug_object_assert_init+0x2dd/0x4b0 [ 86.210939][ T5827] ? do_raw_spin_lock+0x14f/0x370 [ 86.210953][ T5827] ? __pfx_lock_release+0x10/0x10 [ 86.210972][ T5827] ? mark_lock+0x9a/0x360 [ 86.210992][ T5827] __lock_acquire+0x1397/0x2100 [ 86.211012][ T5827] ? kfree+0x196/0x430 [ 86.211028][ T5827] ? ocfs2_dismount_volume+0x1bd/0x910 [ 86.211053][ T5827] lock_acquire+0x1ed/0x550 [ 86.211070][ T5827] ? touch_wq_lockdep_map+0xb1/0x170 [ 86.211091][ T5827] ? __pfx_lock_acquire+0x10/0x10 [ 86.211107][ T5827] ? __asan_memset+0x23/0x50 [ 86.211129][ T5827] ? lockdep_init_map_type+0xa1/0x910 [ 86.211147][ T5827] ? __pfx_lockdep_init_map_type+0x10/0x10 [ 86.211165][ T5827] ? __lock_acquire+0x1397/0x2100 [ 86.211186][ T5827] ? touch_wq_lockdep_map+0xb1/0x170 [ 86.211202][ T5827] touch_wq_lockdep_map+0xc7/0x170 [ 86.211219][ T5827] ? touch_wq_lockdep_map+0xb1/0x170 [ 86.211237][ T5827] __flush_workqueue+0x14a/0x1280 [ 86.211255][ T5827] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 86.211278][ T5827] ? __pfx___flush_workqueue+0x10/0x10 [ 86.211308][ T5827] ? mark_lock+0x9a/0x360 [ 86.211335][ T5827] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 86.211358][ T5827] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 86.211379][ T5827] ? __pfx_ocfs2_shutdown_local_alloc+0x10/0x10 [ 86.211394][ T5827] ? lockdep_hardirqs_on+0x99/0x150 [ 86.211412][ T5827] ? enable_work+0x2e3/0x360 [ 86.211430][ T5827] ? __pfx_enable_work+0x10/0x10 [ 86.211448][ T5827] ? _atomic_dec_and_lock+0x9a/0x130 [ 86.211468][ T5827] ? iput+0x3be/0xa50 [ 86.211488][ T5827] ocfs2_dismount_volume+0x202/0x910 [ 86.211513][ T5827] ? __pfx_ocfs2_dismount_volume+0x10/0x10 [ 86.211536][ T5827] ? __pfx_evict_inodes+0x10/0x10 [ 86.211556][ T5827] ? __pfx_ocfs2_put_super+0x10/0x10 [ 86.211570][ T5827] generic_shutdown_super+0x139/0x2d0 [ 86.211593][ T5827] kill_block_super+0x44/0x90 [ 86.211608][ T5827] deactivate_locked_super+0xc4/0x130 [ 86.211629][ T5827] cleanup_mnt+0x41f/0x4b0 [ 86.211649][ T5827] ? lockdep_hardirqs_on+0x99/0x150 [ 86.211667][ T5827] task_work_run+0x24f/0x310 [ 86.211690][ T5827] ? __pfx_task_work_run+0x10/0x10 [ 86.211724][ T5827] ? do_exit+0xa25/0x28e0 [ 86.211741][ T5827] ? do_exit+0xa25/0x28e0 [ 86.211759][ T5827] do_exit+0xa2a/0x28e0 [ 86.211779][ T5827] ? __pfx_do_exit+0x10/0x10 [ 86.211795][ T5827] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 86.211814][ T5827] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 86.211834][ T5827] ? _raw_spin_unlock_irq+0x23/0x50 [ 86.211849][ T5827] ? lockdep_hardirqs_on+0x99/0x150 [ 86.211867][ T5827] do_group_exit+0x207/0x2c0 [ 86.211887][ T5827] __x64_sys_exit_group+0x3f/0x40 [ 86.211905][ T5827] x64_sys_call+0x26a8/0x26b0 [ 86.211921][ T5827] do_syscall_64+0xf3/0x230 [ 86.211941][ T5827] ? clear_bhb_loop+0x35/0x90 [ 86.211965][ T5827] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.211987][ T5827] RIP: 0033:0x7f75602adb89 [ 86.212004][ T5827] Code: Unable to access opcode bytes at 0x7f75602adb5f. [ 86.212011][ T5827] RSP: 002b:00007ffd306d54e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 86.212027][ T5827] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f75602adb89 [ 86.212039][ T5827] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 86.212047][ T5827] RBP: 00007f756032e2b0 R08: ffffffffffffffb8 R09: 0000000000004701 [pid 5827] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5827, si_uid=0, si_status=1, si_utime=3 /* 0.03 s */, si_stime=35 /* 0.35 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 86.212057][ T5827