===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0 Not tainted ----------------------------------------------------- syz-executor.0/32670 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8c80a058 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xbe/0x300 fs/fcntl.c:792 and this task is already holding: ffff88805dbf6b30 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x2f/0x300 fs/fcntl.c:778 which would create a new lock dependency: (&f->f_owner.lock){...-}-{2:2} -> (tasklist_lock){.+.+}-{2:2} but this new dependency connects a SOFTIRQ-irq-safe lock: (&timer->lock){..-.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 snd_timer_notify+0x105/0x3e0 sound/core/timer.c:1086 snd_pcm_timer_notify sound/core/pcm_native.c:608 [inline] snd_pcm_post_stop sound/core/pcm_native.c:1512 [inline] snd_pcm_drain_done+0x2fd/0x400 sound/core/pcm_native.c:1550 snd_pcm_update_state+0x33d/0x430 sound/core/pcm_lib.c:191 snd_pcm_update_hw_ptr0+0xfca/0x1860 sound/core/pcm_lib.c:465 snd_pcm_period_elapsed_under_stream_lock sound/core/pcm_lib.c:1817 [inline] snd_pcm_period_elapsed+0xfb/0x210 sound/core/pcm_lib.c:1849 call_timer_fn+0xf5/0x210 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers+0x76a/0x980 kernel/time/timer.c:1737 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750 __do_softirq+0x382/0x793 kernel/softirq.c:558 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline] acpi_idle_do_entry drivers/acpi/processor_idle.c:551 [inline] acpi_idle_enter+0x42d/0x790 drivers/acpi/processor_idle.c:686 cpuidle_enter_state+0x517/0xed0 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3d2/0x640 kernel/sched/idle.c:303 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400 start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:266 secondary_startup_64_no_verify+0xc4/0xcb to a SOFTIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1508 kernel_wait+0xe4/0x230 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 other info that might help us debug this: Chain exists of: &timer->lock --> &f->f_owner.lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&timer->lock); lock(&f->f_owner.lock); lock(&timer->lock); *** DEADLOCK *** 5 locks held by syz-executor.0/32670: #0: ffff88807e174460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393 #1: ffff88806c18f258 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:748 [inline] #1: ffff88806c18f258 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: open_last_lookups fs/namei.c:3397 [inline] #1: ffff88806c18f258 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: path_openat+0x837/0x2ec0 fs/namei.c:3606 #2: ffffffff90c59b78 (&fsnotify_mark_srcu){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:267 #3: ffff8880555d4358 (&mark->lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #3: ffff8880555d4358 (&mark->lock){+.+.}-{2:2}, at: dnotify_handle_event+0x59/0x450 fs/notify/dnotify/dnotify.c:107 #4: ffff88805dbf6b30 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x2f/0x300 fs/fcntl.c:778 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&timer->lock){..-.}-{2:2} { IN-SOFTIRQ-W at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 snd_timer_notify+0x105/0x3e0 sound/core/timer.c:1086 snd_pcm_timer_notify sound/core/pcm_native.c:608 [inline] snd_pcm_post_stop sound/core/pcm_native.c:1512 [inline] snd_pcm_drain_done+0x2fd/0x400 sound/core/pcm_native.c:1550 snd_pcm_update_state+0x33d/0x430 sound/core/pcm_lib.c:191 snd_pcm_update_hw_ptr0+0xfca/0x1860 sound/core/pcm_lib.c:465 snd_pcm_period_elapsed_under_stream_lock sound/core/pcm_lib.c:1817 [inline] snd_pcm_period_elapsed+0xfb/0x210 sound/core/pcm_lib.c:1849 call_timer_fn+0xf5/0x210 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers+0x76a/0x980 kernel/time/timer.c:1737 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750 __do_softirq+0x382/0x793 kernel/softirq.c:558 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline] acpi_idle_do_entry drivers/acpi/processor_idle.c:551 [inline] acpi_idle_enter+0x42d/0x790 drivers/acpi/processor_idle.c:686 cpuidle_enter_state+0x517/0xed0 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3d2/0x640 kernel/sched/idle.c:303 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400 start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:266 secondary_startup_64_no_verify+0xc4/0xcb INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:374 [inline] snd_pcm_detach_substream+0x153/0x290 sound/core/pcm.c:1001 snd_pcm_release+0xbd/0x160 sound/core/pcm_native.c:2893 __fput+0x3b9/0x820 fs/file_table.c:317 task_work_run+0x146/0x1c0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] snd_timer_new.__key+0x0/0x20 -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326 fasync_remove_entry+0xff/0x1d0 fs/fcntl.c:873 sock_fasync+0x86/0xf0 net/socket.c:1343 __fput+0x6cd/0x820 fs/file_table.c:314 task_work_run+0x146/0x1c0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xae INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync+0x13b/0x430 fs/fcntl.c:1017 sock_wake_async+0x130/0x150 rcu_read_unlock include/linux/rcupdate.h:723 [inline] sk_wake_async+0x12e/0x200 include/net/sock.h:2459 sock_def_error_report+0x154/0x200 net/core/sock.c:3151 sk_error_report+0x3b/0xb0 net/core/sock.c:340 tcp_disconnect+0x11d3/0x1a70 net/ipv4/tcp.c:3103 __inet_stream_connect+0x2fb/0xe10 net/ipv4/af_inet.c:629 inet_stream_connect+0x61/0xa0 net/ipv4/af_inet.c:724 __sys_connect_file net/socket.c:1900 [inline] __sys_connect+0x29b/0x2d0 net/socket.c:1917 __do_sys_connect net/socket.c:1927 [inline] __se_sys_connect net/socket.c:1924 [inline] __x64_sys_connect+0x76/0x80 net/socket.c:1924 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] fasync_insert_entry.__key+0x0/0x20 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync+0x13b/0x430 fs/fcntl.c:1017 snd_timer_user_ccallback+0x370/0x540 sound/core/timer.c:1386 snd_timer_notify1+0x1ad/0x350 sound/core/timer.c:516 snd_timer_start1+0x53d/0x640 sound/core/timer.c:578 snd_timer_start sound/core/timer.c:696 [inline] snd_timer_user_start sound/core/timer.c:1984 [inline] __snd_timer_user_ioctl+0xae7/0x54c0 sound/core/timer.c:2107 snd_timer_user_ioctl+0x5d/0x80 sound/core/timer.c:2128 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> (&f->f_owner.lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigurg+0x25/0x370 fs/fcntl.c:817 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3198 tcp_check_urg+0x1f6/0x720 net/ipv4/tcp_input.c:5597 tcp_urg+0x152/0x440 net/ipv4/tcp_input.c:5638 tcp_rcv_established+0x9db/0x1a50 net/ipv4/tcp_input.c:5976 tcp_v4_do_rcv+0x479/0xa60 net/ipv4/tcp_ipv4.c:1660 tcp_v4_rcv+0x27aa/0x2fe0 net/ipv4/tcp_ipv4.c:2074 ip_protocol_deliver_rcu+0x21a/0x3f0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x25d/0x420 net/ipv4/ip_input.c:233 __netif_receive_skb_one_core net/core/dev.c:5405 [inline] __netif_receive_skb+0x1c5/0x500 net/core/dev.c:5519 process_backlog+0x4f8/0x8b0 net/core/dev.c:5847 __napi_poll+0xbe/0x4b0 net/core/dev.c:6413 napi_poll net/core/dev.c:6480 [inline] net_rx_action+0x61c/0xf30 net/core/dev.c:6567 __do_softirq+0x382/0x793 kernel/softirq.c:558 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:921 smpboot_thread_fn+0x533/0x9d0 kernel/smpboot.c:164 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326 f_modown+0x38/0x340 fs/fcntl.c:91 fcntl_dirnotify+0x5b7/0x730 fs/notify/dnotify/dnotify.c:369 do_fcntl+0x5c7/0x13b0 fs/fcntl.c:406 __do_sys_fcntl fs/fcntl.c:454 [inline] __se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:439 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigurg+0x25/0x370 fs/fcntl.c:817 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3198 tcp_check_urg+0x1f6/0x720 net/ipv4/tcp_input.c:5597 tcp_urg+0x152/0x440 net/ipv4/tcp_input.c:5638 tcp_rcv_established+0x9db/0x1a50 net/ipv4/tcp_input.c:5976 tcp_v4_do_rcv+0x479/0xa60 net/ipv4/tcp_ipv4.c:1660 sk_backlog_rcv include/net/sock.h:1051 [inline] __release_sock+0x1d8/0x4c0 net/core/sock.c:2794 release_sock+0x5d/0x1c0 net/core/sock.c:3327 sk_stream_wait_memory+0x700/0xdc0 net/core/stream.c:145 tcp_sendmsg_locked+0x111d/0x3fc0 net/ipv4/tcp.c:1411 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1449 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] __sys_sendto+0x42e/0x5b0 net/socket.c:2040 __do_sys_sendto net/socket.c:2052 [inline] __se_sys_sendto net/socket.c:2048 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] __alloc_file.__key+0x0/0x10 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigio+0x2f/0x300 fs/fcntl.c:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync+0x1e4/0x430 fs/fcntl.c:1017 sock_wake_async+0x130/0x150 rcu_read_unlock include/linux/rcupdate.h:723 [inline] sk_wake_async+0x12e/0x200 include/net/sock.h:2459 sock_def_error_report+0x154/0x200 net/core/sock.c:3151 sk_error_report+0x3b/0xb0 net/core/sock.c:340 tcp_disconnect+0x11d3/0x1a70 net/ipv4/tcp.c:3103 __inet_stream_connect+0x2fb/0xe10 net/ipv4/af_inet.c:629 inet_stream_connect+0x61/0xa0 net/ipv4/af_inet.c:724 __sys_connect_file net/socket.c:1900 [inline] __sys_connect+0x29b/0x2d0 net/socket.c:1917 __do_sys_connect net/socket.c:1927 [inline] __se_sys_connect net/socket.c:1924 [inline] __x64_sys_connect+0x76/0x80 net/socket.c:1924 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1508 kernel_wait+0xe4/0x230 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 SOFTIRQ-ON-R at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1508 kernel_wait+0xe4/0x230 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326 copy_process+0x234d/0x3f70 kernel/fork.c:2368 kernel_clone+0x22f/0x7a0 kernel/fork.c:2639 kernel_thread+0x167/0x1e0 kernel/fork.c:2691 rest_init+0x21/0x270 init/main.c:691 start_kernel+0x0/0x56e init/main.c:882 start_kernel+0x4bf/0x56e init/main.c:1140 secondary_startup_64_no_verify+0xc4/0xcb INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1508 kernel_wait+0xe4/0x230 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigio+0xbe/0x300 fs/fcntl.c:792 dnotify_handle_event+0x136/0x450 fs/notify/dnotify/dnotify.c:115 fsnotify+0xc84/0x1270 fs/notify/fsnotify.c:564 fsnotify_name include/linux/fsnotify.h:36 [inline] fsnotify_dirent include/linux/fsnotify.h:42 [inline] fsnotify_create include/linux/fsnotify.h:207 [inline] open_last_lookups fs/namei.c:3402 [inline] path_openat+0x14b3/0x2ec0 fs/namei.c:3606 do_filp_open+0x277/0x4f0 fs/namei.c:3636 do_sys_openat2+0x13b/0x500 fs/open.c:1213 do_sys_open fs/open.c:1229 [inline] __do_sys_creat fs/open.c:1305 [inline] __se_sys_creat fs/open.c:1299 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1299 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae stack backtrace: CPU: 1 PID: 32670 Comm: syz-executor.0 Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2579 [inline] check_irq_usage kernel/locking/lockdep.c:2818 [inline] check_prev_add kernel/locking/lockdep.c:3069 [inline] check_prevs_add kernel/locking/lockdep.c:3188 [inline] validate_chain+0x571e/0x65c0 kernel/locking/lockdep.c:3803 __lock_acquire+0x129a/0x1f80 kernel/locking/lockdep.c:5029 lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigio+0xbe/0x300 fs/fcntl.c:792 dnotify_handle_event+0x136/0x450 fs/notify/dnotify/dnotify.c:115 fsnotify+0xc84/0x1270 fs/notify/fsnotify.c:564 fsnotify_name include/linux/fsnotify.h:36 [inline] fsnotify_dirent include/linux/fsnotify.h:42 [inline] fsnotify_create include/linux/fsnotify.h:207 [inline] open_last_lookups fs/namei.c:3402 [inline] path_openat+0x14b3/0x2ec0 fs/namei.c:3606 do_filp_open+0x277/0x4f0 fs/namei.c:3636 do_sys_openat2+0x13b/0x500 fs/open.c:1213 do_sys_open fs/open.c:1229 [inline] __do_sys_creat fs/open.c:1305 [inline] __se_sys_creat fs/open.c:1299 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1299 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4ab88890e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4ab99df168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f4ab899bf60 RCX: 00007f4ab88890e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f4ab88e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd27816eaf R14: 00007f4ab99df300 R15: 0000000000022000