./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1512961534 <...> Warning: Permanently added '10.128.0.156' (ED25519) to the list of known hosts. execve("./syz-executor1512961534", ["./syz-executor1512961534"], 0x7fff31417160 /* 10 vars */) = 0 brk(NULL) = 0x5555892a8000 brk(0x5555892a8d00) = 0x5555892a8d00 arch_prctl(ARCH_SET_FS, 0x5555892a8380) = 0 set_tid_address(0x5555892a8650) = 5830 set_robust_list(0x5555892a8660, 24) = 0 rseq(0x5555892a8ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1512961534", 4096) = 28 getrandom("\x04\x96\x5e\xa7\x3b\xd0\x3b\x39", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555892a8d00 brk(0x5555892c9d00) = 0x5555892c9d00 brk(0x5555892ca000) = 0x5555892ca000 mprotect(0x7f68a7d95000, 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 5831 attached , child_tidptr=0x5555892a8650) = 5831 [pid 5831] set_robust_list(0x5555892a8660, 24) = 0 [pid 5831] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5831] getppid() = 0 [pid 5831] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5831] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5831] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5831] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5831] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5831] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5831] unshare(CLONE_NEWNS) = 0 [pid 5831] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5831] unshare(CLONE_NEWIPC) = 0 [pid 5831] unshare(CLONE_NEWCGROUP) = 0 [pid 5831] unshare(CLONE_NEWUTS) = 0 [pid 5831] unshare(CLONE_SYSVSEM) = 0 [pid 5831] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5831] write(3, "16777216", 8) = 8 [pid 5831] close(3) = 0 [pid 5831] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5831] write(3, "536870912", 9) = 9 [pid 5831] close(3) = 0 [pid 5831] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5831] write(3, "1024", 4) = 4 [pid 5831] close(3) = 0 [pid 5831] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5831] write(3, "8192", 4) = 4 [pid 5831] close(3) = 0 [pid 5831] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5831] write(3, "1024", 4) = 4 [pid 5831] close(3) = 0 [pid 5831] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5831] write(3, "1024", 4) = 4 [pid 5831] close(3) = 0 [pid 5831] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5831] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5831] close(3) = 0 [pid 5831] getpid() = 1 [pid 5831] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<s_umount_key#44){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 75.786749][ T5831] [ 75.786749][ T5831] which lock already depends on the new lock. [ 75.786749][ T5831] [ 75.797139][ T5831] [ 75.797139][ T5831] the existing dependency chain (in reverse order) is: [ 75.806146][ T5831] [ 75.806146][ T5831] -> #2 (&type->s_umount_key#44){++++}-{4:4}: [ 75.814419][ T5831] lock_acquire+0x1ed/0x550 [ 75.819449][ T5831] down_read+0xb1/0xa40 [ 75.824158][ T5831] ocfs2_finish_quota_recovery+0x15c/0x22a0 [ 75.830582][ T5831] ocfs2_complete_recovery+0x17c1/0x25c0 [ 75.836727][ T5831] process_scheduled_works+0xac0/0x18e0 [ 75.842797][ T5831] worker_thread+0x870/0xd30 [ 75.847911][ T5831] kthread+0x7ab/0x920 [ 75.852502][ T5831] ret_from_fork+0x4d/0x80 [ 75.857615][ T5831] ret_from_fork_asm+0x1a/0x30 [ 75.862923][ T5831] [ 75.862923][ T5831] -> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}: [ 75.873099][ T5831] lock_acquire+0x1ed/0x550 [ 75.878215][ T5831] process_scheduled_works+0x9e4/0x18e0 [ 75.884370][ T5831] worker_thread+0x870/0xd30 [ 75.889480][ T5831] kthread+0x7ab/0x920 [ 75.894073][ T5831] ret_from_fork+0x4d/0x80 [ 75.899023][ T5831] ret_from_fork_asm+0x1a/0x30 [ 75.904322][ T5831] [ 75.904322][ T5831] -> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}: [ 75.912673][ T5831] validate_chain+0x18ef/0x5920 [ 75.918039][ T5831] __lock_acquire+0x1397/0x2100 [ 75.923443][ T5831] lock_acquire+0x1ed/0x550 [ 75.928476][ T5831] touch_wq_lockdep_map+0xc7/0x170 [ 75.934123][ T5831] __flush_workqueue+0x14a/0x1280 [ 75.939682][ T5831] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 75.945926][ T5831] ocfs2_dismount_volume+0x202/0x910 [ 75.951729][ T5831] generic_shutdown_super+0x13b/0x2d0 [ 75.957627][ T5831] kill_block_super+0x44/0x90 [ 75.962825][ T5831] deactivate_locked_super+0xc6/0x130 [ 75.968722][ T5831] cleanup_mnt+0x41f/0x4b0 [ 75.973670][ T5831] task_work_run+0x251/0x310 [ 75.978772][ T5831] do_exit+0xa2a/0x28e0 [ 75.983455][ T5831] do_group_exit+0x207/0x2c0 [ 75.988567][ T5831] __x64_sys_exit_group+0x3f/0x40 [ 75.994113][ T5831] x64_sys_call+0x26a8/0x26b0 [ 75.999310][ T5831] do_syscall_64+0xf3/0x230 [ 76.004333][ T5831] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.010749][ T5831] [ 76.010749][ T5831] other info that might help us debug this: [ 76.010749][ T5831] [ 76.020964][ T5831] Chain exists of: [ 76.020964][ T5831] (wq_completion)ocfs2_wq --> (work_completion)(&journal->j_recovery_work) --> &type->s_umount_key#44 [ 76.020964][ T5831] [ 76.037853][ T5831] Possible unsafe locking scenario: [ 76.037853][ T5831] [ 76.045292][ T5831] CPU0 CPU1 [ 76.050645][ T5831] ---- ---- [ 76.055994][ T5831] lock(&type->s_umount_key#44); [ 76.061031][ T5831] lock((work_completion)(&journal->j_recovery_work)); [ 76.070485][ T5831] lock(&type->s_umount_key#44); [ 76.078039][ T5831] lock((wq_completion)ocfs2_wq); [ 76.083150][ T5831] [ 76.083150][ T5831] *** DEADLOCK *** [ 76.083150][ T5831] [ 76.091280][ T5831] 1 lock held by syz-executor151/5831: [ 76.096722][ T5831] #0: ffff88807e1f20e0 (&type->s_umount_key#44){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 [ 76.106952][ T5831] [ 76.106952][ T5831] stack backtrace: [ 76.112829][ T5831] CPU: 0 UID: 0 PID: 5831 Comm: syz-executor151 Not tainted 6.14.0-rc3-syzkaller-00293-g5cf80612d3f7 #0 [ 76.112853][ T5831] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 76.112866][ T5831] Call Trace: [ 76.112876][ T5831] [ 76.112885][ T5831] dump_stack_lvl+0x241/0x360 [ 76.112911][ T5831] ? __pfx_dump_stack_lvl+0x10/0x10 [ 76.112933][ T5831] ? __pfx__printk+0x10/0x10 [ 76.112956][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.112992][ T5831] print_circular_bug+0x13a/0x1b0 [ 76.113018][ T5831] check_noncircular+0x36a/0x4a0 [ 76.113040][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113073][ T5831] ? __lock_acquire+0x1397/0x2100 [ 76.113106][ T5831] ? __pfx_check_noncircular+0x10/0x10 [ 76.113129][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113162][ T5831] ? lockdep_lock+0x123/0x2b0 [ 76.113191][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113223][ T5831] ? mark_lock+0x9a/0x360 [ 76.113246][ T5831] validate_chain+0x18ef/0x5920 [ 76.113274][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113311][ T5831] ? __pfx_validate_chain+0x10/0x10 [ 76.113338][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113373][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113409][ T5831] ? debug_object_assert_init+0x2dd/0x4b0 [ 76.113439][ T5831] ? do_raw_spin_lock+0x14f/0x370 [ 76.113465][ T5831] ? __pfx_lock_release+0x10/0x10 [ 76.113498][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113530][ T5831] ? mark_lock+0x9a/0x360 [ 76.113548][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113582][ T5831] __lock_acquire+0x1397/0x2100 [ 76.113616][ T5831] ? kfree+0x196/0x430 [ 76.113643][ T5831] ? ocfs2_dismount_volume+0x1bd/0x910 [ 76.113670][ T5831] lock_acquire+0x1ed/0x550 [ 76.113700][ T5831] ? touch_wq_lockdep_map+0xb1/0x170 [ 76.113732][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113767][ T5831] ? __pfx_lock_acquire+0x10/0x10 [ 76.113796][ T5831] ? __asan_memset+0x23/0x50 [ 76.113819][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113852][ T5831] ? lockdep_init_map_type+0xa1/0x910 [ 76.113883][ T5831] ? __pfx_lockdep_init_map_type+0x10/0x10 [ 76.113915][ T5831] ? __lock_acquire+0x1397/0x2100 [ 76.113948][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.113983][ T5831] ? touch_wq_lockdep_map+0xb1/0x170 [ 76.114012][ T5831] touch_wq_lockdep_map+0xc7/0x170 [ 76.114042][ T5831] ? touch_wq_lockdep_map+0xb1/0x170 [ 76.114074][ T5831] __flush_workqueue+0x14a/0x1280 [ 76.114104][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.114136][ T5831] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 76.114173][ T5831] ? __pfx___flush_workqueue+0x10/0x10 [ 76.114210][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.114242][ T5831] ? mark_lock+0x9a/0x360 [ 76.114262][ T5831] ocfs2_shutdown_local_alloc+0x109/0xa90 [ 76.114290][ T5831] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 76.114323][ T5831] ? __pfx_ocfs2_shutdown_local_alloc+0x10/0x10 [ 76.114348][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.114380][ T5831] ? lockdep_hardirqs_on+0x99/0x150 [ 76.114407][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.114440][ T5831] ? enable_work+0x2e3/0x360 [ 76.114471][ T5831] ? __pfx_enable_work+0x10/0x10 [ 76.114503][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.114535][ T5831] ? _atomic_dec_and_lock+0x9a/0x130 [ 76.114563][ T5831] ? iput+0x3be/0xa50 [ 76.114595][ T5831] ocfs2_dismount_volume+0x202/0x910 [ 76.114622][ T5831] ? __pfx_ocfs2_dismount_volume+0x10/0x10 [ 76.114646][ T5831] ? __pfx_evict_inodes+0x10/0x10 [ 76.114676][ T5831] ? __pfx_ocfs2_put_super+0x10/0x10 [ 76.114701][ T5831] generic_shutdown_super+0x13b/0x2d0 [ 76.114737][ T5831] kill_block_super+0x44/0x90 [ 76.114760][ T5831] deactivate_locked_super+0xc6/0x130 [ 76.114794][ T5831] cleanup_mnt+0x41f/0x4b0 [ 76.114831][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.114863][ T5831] ? lockdep_hardirqs_on+0x99/0x150 [ 76.114890][ T5831] task_work_run+0x251/0x310 [ 76.114915][ T5831] ? __pfx_task_work_run+0x10/0x10 [ 76.114935][ T5831] ? do_exit+0xa25/0x28e0 [ 76.114965][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.114998][ T5831] ? do_exit+0xa25/0x28e0 [ 76.115029][ T5831] do_exit+0xa2a/0x28e0 [ 76.115062][ T5831] ? __pfx_do_exit+0x10/0x10 [ 76.115091][ T5831] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 76.115123][ T5831] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 76.115158][ T5831] ? _raw_spin_unlock_irq+0x23/0x50 [ 76.115180][ T5831] ? srso_alias_return_thunk+0x5/0xfbef5 [ 76.115215][ T5831] ? lockdep_hardirqs_on+0x99/0x150 [ 76.115241][ T5831] do_group_exit+0x207/0x2c0 [ 76.115275][ T5831] __x64_sys_exit_group+0x3f/0x40 [ 76.115305][ T5831] x64_sys_call+0x26a8/0x26b0 [ 76.115331][ T5831] do_syscall_64+0xf3/0x230 [ 76.115362][ T5831] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.115391][ T5831] RIP: 0033:0x7f68a7d1ac09 [ 76.115408][ T5831] Code: Unable to access opcode bytes at 0x7f68a7d1abdf. [ 76.115418][ T5831] RSP: 002b:00007ffd75472468 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 76.115439][ T5831] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f68a7d1ac09 [ 76.115454][ T5831] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 76.115466][ T5831] RBP: 00007f68a7d9b2b0 R08: ffffffffffffffb8 R09: 0000000000004701 [pid 5831] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5831, si_uid=0, si_status=1, si_utime=1 /* 0.01 s */, si_stime=36 /* 0.36 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 76.115481][ T5831] R10: 0000000000000000 R11: 000000000000