===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.19.0-rc5-syzkaller-00250-gd9919d43cbf6 #0 Not tainted ----------------------------------------------------- syz-executor.5/13224 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888020c20408 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:995 [inline] ffff888020c20408 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x13b/0x430 fs/fcntl.c:1016 and this task is already holding: ffff888026362948 (&timer->lock){..-.}-{2:2}, at: snd_timer_start1+0x5b/0x640 sound/core/timer.c:541 which would create a new lock dependency: (&timer->lock){..-.}-{2:2} -> (&new->fa_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:5665 __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:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers+0x76a/0x980 kernel/time/timer.c:1790 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803 __do_softirq+0x382/0x793 kernel/softirq.c:571 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1b/0x20 __unwind_start+0x3ed/0x760 arch/x86/kernel/unwind_orc.c:681 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xdc/0x140 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:469 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3243 [inline] slab_alloc mm/slub.c:3251 [inline] __kmem_cache_alloc_lru mm/slub.c:3258 [inline] kmem_cache_alloc+0x199/0x2f0 mm/slub.c:3268 mempool_alloc+0x17d/0x5c0 mm/mempool.c:392 bio_alloc_bioset+0x3cd/0x11a0 block/bio.c:521 bio_alloc include/linux/bio.h:423 [inline] do_mpage_readpage+0x199a/0x1e50 fs/mpage.c:272 mpage_readahead+0x1b6/0x320 fs/mpage.c:356 read_pages+0x13f/0x880 mm/readahead.c:158 page_cache_ra_unbounded+0x185/0x640 mm/readahead.c:236 do_page_cache_ra mm/readahead.c:293 [inline] force_page_cache_ra+0x2d6/0x340 mm/readahead.c:324 page_cache_sync_readahead include/linux/pagemap.h:1234 [inline] filemap_get_pages+0x468/0x1140 mm/filemap.c:2594 filemap_read+0x3ce/0xeb0 mm/filemap.c:2688 blkdev_read_iter+0x3de/0x520 block/fops.c:594 call_read_iter include/linux/fs.h:2052 [inline] new_sync_read fs/read_write.c:401 [inline] vfs_read+0xa01/0xd10 fs/read_write.c:482 ksys_read+0x19b/0x2c0 fs/read_write.c:620 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+0x46/0xb0 to a SOFTIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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 --> &new->fa_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&timer->lock); lock(&new->fa_lock); lock(&timer->lock); *** DEADLOCK *** 3 locks held by syz-executor.5/13224: #0: ffff888048505568 (&tu->ioctl_lock){+.+.}-{3:3}, at: snd_timer_user_ioctl+0x4d/0x80 sound/core/timer.c:2127 #1: ffff888026362948 (&timer->lock){..-.}-{2:2}, at: snd_timer_start1+0x5b/0x640 sound/core/timer.c:541 #2: ffffffff8cb1e820 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:268 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:5665 __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:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers+0x76a/0x980 kernel/time/timer.c:1790 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803 __do_softirq+0x382/0x793 kernel/softirq.c:571 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1b/0x20 __unwind_start+0x3ed/0x760 arch/x86/kernel/unwind_orc.c:681 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xdc/0x140 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:469 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3243 [inline] slab_alloc mm/slub.c:3251 [inline] __kmem_cache_alloc_lru mm/slub.c:3258 [inline] kmem_cache_alloc+0x199/0x2f0 mm/slub.c:3268 mempool_alloc+0x17d/0x5c0 mm/mempool.c:392 bio_alloc_bioset+0x3cd/0x11a0 block/bio.c:521 bio_alloc include/linux/bio.h:423 [inline] do_mpage_readpage+0x199a/0x1e50 fs/mpage.c:272 mpage_readahead+0x1b6/0x320 fs/mpage.c:356 read_pages+0x13f/0x880 mm/readahead.c:158 page_cache_ra_unbounded+0x185/0x640 mm/readahead.c:236 do_page_cache_ra mm/readahead.c:293 [inline] force_page_cache_ra+0x2d6/0x340 mm/readahead.c:324 page_cache_sync_readahead include/linux/pagemap.h:1234 [inline] filemap_get_pages+0x468/0x1140 mm/filemap.c:2594 filemap_read+0x3ce/0xeb0 mm/filemap.c:2688 blkdev_read_iter+0x3de/0x520 block/fops.c:594 call_read_iter include/linux/fs.h:2052 [inline] new_sync_read fs/read_write.c:401 [inline] vfs_read+0xa01/0xd10 fs/read_write.c:482 ksys_read+0x19b/0x2c0 fs/read_write.c:620 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+0x46/0xb0 INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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_action sound/core/pcm_native.c:1364 [inline] snd_pcm_stop+0x3b8/0x4c0 sound/core/pcm_native.c:1535 snd_pcm_drop+0x431/0x580 sound/core/pcm_native.c:2218 snd_pcm_oss_sync+0x254/0xf00 sound/core/oss/pcm_oss.c:1746 snd_pcm_oss_release+0x119/0x270 sound/core/oss/pcm_oss.c:2590 __fput+0x3b9/0x820 fs/file_table.c:317 task_work_run+0x146/0x1c0 kernel/task_work.c:177 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/0x60 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x46/0xb0 } ... key at: [] snd_timer_new.__key+0x0/0x20 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:5665 __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:5665 __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:5665 __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+0x2414/0x3fa0 kernel/fork.c:2374 kernel_clone+0x22f/0x7a0 kernel/fork.c:2655 user_mode_thread+0x12d/0x190 kernel/fork.c:2724 rest_init+0x21/0x270 init/main.c:691 start_kernel+0x0/0x55b init/main.c:882 start_kernel+0x4ac/0x55b init/main.c:1137 secondary_startup_64_no_verify+0xcf/0xdb INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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:5665 __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:791 dnotify_handle_event+0x136/0x450 fs/notify/dnotify/dnotify.c:115 fsnotify+0xc7e/0x12c0 fs/notify/fsnotify.c:567 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:3446 [inline] path_openat+0x14b3/0x2ec0 fs/namei.c:3650 do_filp_open+0x277/0x4f0 fs/namei.c:3680 do_sys_openat2+0x13b/0x500 fs/open.c:1278 do_sys_open fs/open.c:1294 [inline] __do_sys_creat fs/open.c:1370 [inline] __se_sys_creat fs/open.c:1364 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1364 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+0x46/0xb0 -> (&f->f_owner.lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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:816 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3275 tcp_check_urg+0x1f6/0x720 net/ipv4/tcp_input.c:5596 tcp_urg+0x152/0x440 net/ipv4/tcp_input.c:5637 tcp_rcv_established+0x9f0/0x1a10 net/ipv4/tcp_input.c:5984 tcp_v6_do_rcv+0x563/0x1270 net/ipv6/tcp_ipv6.c:1476 tcp_v6_rcv+0x23ef/0x2c10 net/ipv6/tcp_ipv6.c:1735 ip6_protocol_deliver_rcu+0x9c5/0x1360 net/ipv6/ip6_input.c:436 ip6_input_finish+0x140/0x260 net/ipv6/ip6_input.c:481 __netif_receive_skb_one_core net/core/dev.c:5480 [inline] __netif_receive_skb+0x1c5/0x500 net/core/dev.c:5594 process_backlog+0x4f8/0x8b0 net/core/dev.c:5922 __napi_poll+0xbe/0x4b0 net/core/dev.c:6488 napi_poll net/core/dev.c:6555 [inline] net_rx_action+0x76c/0x10b0 net/core/dev.c:6666 __do_softirq+0x382/0x793 kernel/softirq.c:571 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:934 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:5665 __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:90 fcntl_dirnotify+0x68b/0x890 fs/notify/dnotify/dnotify.c:369 do_fcntl+0x5c7/0x1370 fs/fcntl.c:405 __do_sys_fcntl fs/fcntl.c:453 [inline] __se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:438 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+0x46/0xb0 INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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:816 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3275 tcp_check_urg+0x1f6/0x720 net/ipv4/tcp_input.c:5596 tcp_urg+0x152/0x440 net/ipv4/tcp_input.c:5637 tcp_rcv_established+0x9f0/0x1a10 net/ipv4/tcp_input.c:5984 tcp_v6_do_rcv+0x563/0x1270 net/ipv6/tcp_ipv6.c:1476 sk_backlog_rcv include/net/sock.h:1047 [inline] __release_sock+0x1d8/0x4c0 net/core/sock.c:2849 release_sock+0x5d/0x1c0 net/core/sock.c:3404 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1449 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x439/0x5c0 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2127 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+0x46/0xb0 } ... key at: [] __alloc_file.__key+0x0/0x10 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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:777 kill_fasync_rcu fs/fcntl.c:1002 [inline] kill_fasync+0x1e4/0x430 fs/fcntl.c:1016 sock_wake_async+0x130/0x150 rcu_read_unlock include/linux/rcupdate.h:724 [inline] sk_wake_async+0x12e/0x200 include/net/sock.h:2467 sock_def_readable+0x152/0x200 net/core/sock.c:3219 unix_dgram_sendmsg+0x1553/0x1fc0 net/unix/af_unix.c:2028 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2488 ___sys_sendmsg net/socket.c:2542 [inline] __sys_sendmmsg+0xa6f/0xd20 net/socket.c:2628 __do_sys_sendmmsg net/socket.c:2657 [inline] __se_sys_sendmmsg net/socket.c:2654 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2654 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+0x46/0xb0 -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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:872 sock_fasync+0x86/0xf0 net/socket.c:1390 __fput+0x6cd/0x820 fs/file_table.c:314 task_work_run+0x146/0x1c0 kernel/task_work.c:177 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/0x60 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x46/0xb0 INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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:995 [inline] kill_fasync+0x13b/0x430 fs/fcntl.c:1016 sock_wake_async+0x130/0x150 rcu_read_unlock include/linux/rcupdate.h:724 [inline] sk_wake_async+0x12e/0x200 include/net/sock.h:2467 sock_def_readable+0x152/0x200 net/core/sock.c:3219 unix_dgram_sendmsg+0x1553/0x1fc0 net/unix/af_unix.c:2028 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2488 ___sys_sendmsg net/socket.c:2542 [inline] __sys_sendmmsg+0xa6f/0xd20 net/socket.c:2628 __do_sys_sendmmsg net/socket.c:2657 [inline] __se_sys_sendmmsg net/socket.c:2654 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2654 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+0x46/0xb0 } ... key at: [] fasync_insert_entry.__key+0x0/0x20 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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:995 [inline] kill_fasync+0x13b/0x430 fs/fcntl.c:1016 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+0x46/0xb0 stack backtrace: CPU: 1 PID: 13224 Comm: syz-executor.5 Not tainted 5.19.0-rc5-syzkaller-00250-gd9919d43cbf6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 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:2609 [inline] check_irq_usage kernel/locking/lockdep.c:2848 [inline] check_prev_add kernel/locking/lockdep.c:3099 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain+0x571e/0x65c0 kernel/locking/lockdep.c:3829 __lock_acquire+0x129a/0x1f80 kernel/locking/lockdep.c:5053 lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 __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:995 [inline] kill_fasync+0x13b/0x430 fs/fcntl.c:1016 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+0x46/0xb0 RIP: 0033:0x7fb68b489109 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:00007fb68c522168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb68b59bf60 RCX: 00007fb68b489109 RDX: 0000000000000000 RSI: 0000000000005420 RDI: 0000000000000003 RBP: 00007fb68b4e305d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdcc5280df R14: 00007fb68c522300 R15: 0000000000022000