./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor475762386 <...> Warning: Permanently added '10.128.1.22' (ED25519) to the list of known hosts. execve("./syz-executor475762386", ["./syz-executor475762386"], 0x7ffd83f3cef0 /* 10 vars */) = 0 brk(NULL) = 0x555567315000 brk(0x555567315d00) = 0x555567315d00 arch_prctl(ARCH_SET_FS, 0x555567315380) = 0 set_tid_address(0x555567315650) = 5827 set_robust_list(0x555567315660, 24) = 0 rseq(0x555567315ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor475762386", 4096) = 27 getrandom("\x9c\xd8\x48\xdd\x11\xbe\x5d\x91", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555567315d00 brk(0x555567336d00) = 0x555567336d00 brk(0x555567337000) = 0x555567337000 mprotect(0x7f9f7f037000, 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 5828 attached [pid 5828] set_robust_list(0x555567315660, 24 [pid 5827] <... clone resumed>, child_tidptr=0x555567315650) = 5828 [pid 5828] <... set_robust_list resumed>) = 0 [pid 5828] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5828] getppid() = 0 [pid 5828] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5828] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5828] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5828] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5828] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5828] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5828] unshare(CLONE_NEWNS) = 0 [pid 5828] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5828] unshare(CLONE_NEWIPC) = 0 [pid 5828] unshare(CLONE_NEWCGROUP) = 0 [pid 5828] unshare(CLONE_NEWUTS) = 0 [pid 5828] unshare(CLONE_SYSVSEM) = 0 [pid 5828] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5828] write(3, "16777216", 8) = 8 [pid 5828] close(3) = 0 [pid 5828] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5828] write(3, "536870912", 9) = 9 [pid 5828] close(3) = 0 [pid 5828] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5828] write(3, "1024", 4) = 4 [pid 5828] close(3) = 0 [pid 5828] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5828] write(3, "8192", 4) = 4 [pid 5828] close(3) = 0 [pid 5828] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5828] write(3, "1024", 4) = 4 [pid 5828] close(3) = 0 [pid 5828] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5828] write(3, "1024", 4) = 4 [pid 5828] close(3) = 0 [pid 5828] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5828] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5828] close(3) = 0 [pid 5828] getpid() = 1 [pid 5828] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 76.907144][ T5828] [ 76.907144][ T5828] which lock already depends on the new lock. [ 76.907144][ T5828] [ 76.917553][ T5828] [ 76.917553][ T5828] the existing dependency chain (in reverse order) is: [ 76.926577][ T5828] [ 76.926577][ T5828] -> #2 (&type->s_umount_key#45){++++}-{4:4}: [ 76.934935][ T5828] lock_acquire+0x1ed/0x550 [ 76.939973][ T5828] down_read+0xb1/0xa40 [ 76.944660][ T5828] ocfs2_finish_quota_recovery+0x15c/0x22a0 [ 76.951095][ T5828] ocfs2_complete_recovery+0x17c1/0x25c0 [ 76.957255][ T5828] process_scheduled_works+0xabe/0x18e0 [ 76.963325][ T5828] worker_thread+0x870/0xd30 [ 76.968439][ T5828] kthread+0x7a9/0x920 [ 76.973037][ T5828] ret_from_fork+0x4b/0x80 [ 76.977979][ T5828] ret_from_fork_asm+0x1a/0x30 [ 76.983270][ T5828] [ 76.983270][ T5828] -> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}: [ 76.993448][ T5828] lock_acquire+0x1ed/0x550 [ 76.998479][ T5828] process_scheduled_works+0x9e4/0x18e0 [ 77.004635][ T5828] worker_thread+0x870/0xd30 [ 77.009755][ T5828] kthread+0x7a9/0x920 [ 77.014355][ T5828] ret_from_fork+0x4b/0x80 [ 77.019296][ T5828] ret_from_fork_asm+0x1a/0x30 [ 77.024585][ T5828] [ 77.024585][ T5828] -> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}: [ 77.033050][ T5828] validate_chain+0x18ef/0x5920 [ 77.038456][ T5828] __lock_acquire+0x1397/0x2100 [ 77.043873][ T5828] lock_acquire+0x1ed/0x550 [ 77.048918][ T5828] touch_wq_lockdep_map+0xc7/0x170 [ 77.054565][ T5828] __flush_workqueue+0x14a/0x1280 [ 77.060119][ T5828] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 77.066372][ T5828] ocfs2_dismount_volume+0x202/0x910 [ 77.072191][ T5828] generic_shutdown_super+0x139/0x2d0 [ 77.078098][ T5828] kill_block_super+0x44/0x90 [ 77.083316][ T5828] deactivate_locked_super+0xc4/0x130 [ 77.089216][ T5828] cleanup_mnt+0x41f/0x4b0 [ 77.094159][ T5828] task_work_run+0x24f/0x310 [ 77.099281][ T5828] do_exit+0xa2a/0x28e0 [ 77.103985][ T5828] do_group_exit+0x207/0x2c0 [ 77.109124][ T5828] __x64_sys_exit_group+0x3f/0x40 [ 77.114692][ T5828] x64_sys_call+0x26a8/0x26b0 [ 77.119911][ T5828] do_syscall_64+0xf3/0x230 [ 77.124997][ T5828] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.131451][ T5828] [ 77.131451][ T5828] other info that might help us debug this: [ 77.131451][ T5828] [ 77.141685][ T5828] Chain exists of: [ 77.141685][ T5828] (wq_completion)ocfs2_wq --> (work_completion)(&journal->j_recovery_work) --> &type->s_umount_key#45 [ 77.141685][ T5828] [ 77.158631][ T5828] Possible unsafe locking scenario: [ 77.158631][ T5828] [ 77.166081][ T5828] CPU0 CPU1 [ 77.171459][ T5828] ---- ---- [ 77.176834][ T5828] lock(&type->s_umount_key#45); [ 77.181889][ T5828] lock((work_completion)(&journal->j_recovery_work)); [ 77.191444][ T5828] lock(&type->s_umount_key#45); [ 77.199016][ T5828] lock((wq_completion)ocfs2_wq); [ 77.204136][ T5828] [ 77.204136][ T5828] *** DEADLOCK *** [ 77.204136][ T5828] [ 77.212301][ T5828] 1 lock held by syz-executor475/5828: [ 77.217756][ T5828] #0: ffff888035e440e0 (&type->s_umount_key#45){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 77.228055][ T5828] [ 77.228055][ T5828] stack backtrace: [ 77.233957][ T5828] CPU: 0 UID: 0 PID: 5828 Comm: syz-executor475 Not tainted 6.14.0-rc2-syzkaller-00162-g68763b29e0a6 #0 [ 77.233976][ T5828] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 77.233992][ T5828] Call Trace: [ 77.234001][ T5828] [ 77.234009][ T5828] dump_stack_lvl+0x241/0x360 [ 77.234032][ T5828] ? __pfx_dump_stack_lvl+0x10/0x10 [ 77.234047][ T5828] ? __pfx__printk+0x10/0x10 [ 77.234074][ T5828] print_circular_bug+0x13a/0x1b0 [ 77.234091][ T5828] check_noncircular+0x36a/0x4a0 [ 77.234106][ T5828] ? __lock_acquire+0x1397/0x2100 [ 77.234129][ T5828] ? __pfx_check_noncircular+0x10/0x10 [ 77.234144][ T5828] ? queued_spin_lock_slowpath+0x42/0x50 [ 77.234167][ T5828] ? lockdep_lock+0x1b0/0x2b0 [ 77.234187][ T5828] ? mark_lock+0x9a/0x360 [ 77.234212][ T5828] validate_chain+0x18ef/0x5920 [ 77.234235][ T5828] ? __pfx_validate_chain+0x10/0x10 [ 77.234259][ T5828] ? debug_object_assert_init+0x2dd/0x4b0 [ 77.234279][ T5828] ? do_raw_spin_lock+0x14f/0x370 [ 77.234296][ T5828] ? __pfx_lock_release+0x10/0x10 [ 77.234319][ T5828] ? mark_lock+0x9a/0x360 [ 77.234342][ T5828] __lock_acquire+0x1397/0x2100 [ 77.234365][ T5828] ? kfree+0x196/0x430 [ 77.234388][ T5828] ? ocfs2_dismount_volume+0x1bd/0x910 [ 77.234413][ T5828] lock_acquire+0x1ed/0x550 [ 77.234433][ T5828] ? touch_wq_lockdep_map+0xb1/0x170 [ 77.234457][ T5828] ? __pfx_lock_acquire+0x10/0x10 [ 77.234476][ T5828] ? __asan_memset+0x23/0x50 [ 77.234513][ T5828] ? lockdep_init_map_type+0xa1/0x910 [ 77.234535][ T5828] ? __pfx_lockdep_init_map_type+0x10/0x10 [ 77.234557][ T5828] ? __lock_acquire+0x1397/0x2100 [ 77.234581][ T5828] ? touch_wq_lockdep_map+0xb1/0x170 [ 77.234602][ T5828] touch_wq_lockdep_map+0xc7/0x170 [ 77.234623][ T5828] ? touch_wq_lockdep_map+0xb1/0x170 [ 77.234650][ T5828] __flush_workqueue+0x14a/0x1280 [ 77.234671][ T5828] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 77.234697][ T5828] ? __pfx___flush_workqueue+0x10/0x10 [ 77.234723][ T5828] ? mark_lock+0x9a/0x360 [ 77.234747][ T5828] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 77.234772][ T5828] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 77.234796][ T5828] ? __pfx_ocfs2_shutdown_local_alloc+0x10/0x10 [ 77.234819][ T5828] ? lockdep_hardirqs_on+0x99/0x150 [ 77.234837][ T5828] ? enable_work+0x2e3/0x360 [ 77.234859][ T5828] ? __pfx_enable_work+0x10/0x10 [ 77.234881][ T5828] ? _atomic_dec_and_lock+0x9a/0x130 [ 77.234901][ T5828] ? iput+0x3be/0xa50 [ 77.234918][ T5828] ocfs2_dismount_volume+0x202/0x910 [ 77.234942][ T5828] ? __pfx_ocfs2_dismount_volume+0x10/0x10 [ 77.234964][ T5828] ? __pfx_evict_inodes+0x10/0x10 [ 77.234981][ T5828] ? __pfx_ocfs2_put_super+0x10/0x10 [ 77.235003][ T5828] generic_shutdown_super+0x139/0x2d0 [ 77.235023][ T5828] kill_block_super+0x44/0x90 [ 77.235045][ T5828] deactivate_locked_super+0xc4/0x130 [ 77.235063][ T5828] cleanup_mnt+0x41f/0x4b0 [ 77.235082][ T5828] ? lockdep_hardirqs_on+0x99/0x150 [ 77.235100][ T5828] task_work_run+0x24f/0x310 [ 77.235127][ T5828] ? __pfx_task_work_run+0x10/0x10 [ 77.235150][ T5828] ? do_exit+0xa25/0x28e0 [ 77.235172][ T5828] ? do_exit+0xa25/0x28e0 [ 77.235193][ T5828] do_exit+0xa2a/0x28e0 [ 77.235217][ T5828] ? __pfx_do_exit+0x10/0x10 [ 77.235236][ T5828] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 77.235259][ T5828] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 77.235284][ T5828] ? _raw_spin_unlock_irq+0x23/0x50 [ 77.235299][ T5828] ? lockdep_hardirqs_on+0x99/0x150 [ 77.235317][ T5828] do_group_exit+0x207/0x2c0 [ 77.235340][ T5828] __x64_sys_exit_group+0x3f/0x40 [ 77.235362][ T5828] x64_sys_call+0x26a8/0x26b0 [ 77.235380][ T5828] do_syscall_64+0xf3/0x230 [ 77.235401][ T5828] ? clear_bhb_loop+0x35/0x90 [ 77.235426][ T5828] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.235448][ T5828] RIP: 0033:0x7f9f7efbcc09 [ 77.235469][ T5828] Code: Unable to access opcode bytes at 0x7f9f7efbcbdf. [ 77.235478][ T5828] RSP: 002b:00007fff032e9008 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 77.235494][ T5828] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f9f7efbcc09 [ 77.235505][ T5828] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 77.235515][ T5828] RBP: 00007f9f7f03d2b0 R08: ffffffffffffffb8 R09: 0000000000004701 [pid 5828] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5828, si_uid=0, si_status=1, si_utime=5 /* 0.05 s */, si_stime=31 /* 0.31 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 77.235526][ T5828] R10: 0000000000000000 R11: 0000000000000246 R1