===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.18.0-syzkaller-02752-gfdaf9a5840ac #0 Not tainted ----------------------------------------------------- syz-executor.2/4366 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8ba0a098 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xab/0x380 fs/fcntl.c:792 and this task is already holding: ffff88807ac7a630 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x24/0x380 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 kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 snd_timer_notify sound/core/timer.c:1086 [inline] snd_timer_notify+0x10c/0x3d0 sound/core/timer.c:1073 snd_pcm_timer_notify sound/core/pcm_native.c:608 [inline] snd_pcm_post_stop+0x195/0x1f0 sound/core/pcm_native.c:1512 snd_pcm_action_single+0xf4/0x130 sound/core/pcm_native.c:1283 snd_pcm_action+0x6e/0x90 sound/core/pcm_native.c:1364 __snd_pcm_xrun+0x150/0x650 sound/core/pcm_lib.c:155 snd_pcm_update_state+0x4ad/0x540 sound/core/pcm_lib.c:196 snd_pcm_update_hw_ptr0+0xa75/0x1a50 sound/core/pcm_lib.c:465 snd_pcm_period_elapsed_under_stream_lock+0x15a/0x230 sound/core/pcm_lib.c:1817 snd_pcm_period_elapsed+0x28/0x50 sound/core/pcm_lib.c:1849 loopback_jiffies_timer_function+0x1c4/0x240 sound/drivers/aloop.c:668 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x679/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649 get_current arch/x86/include/asm/current.h:15 [inline] __syscall_enter_from_user_work kernel/entry/common.c:89 [inline] syscall_enter_from_user_mode+0x2b/0x70 kernel/entry/common.c:110 do_syscall_64+0x16/0xb0 arch/x86/entry/common.c:76 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 kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 do_wait+0x284/0xce0 kernel/exit.c:1508 kernel_wait+0x9c/0x150 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 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.2/4366: #0: ffffffff8bf4cc10 (file_rwsem){.+.+}-{0:0}, at: break_lease include/linux/fs.h:2497 [inline] #0: ffffffff8bf4cc10 (file_rwsem){.+.+}-{0:0}, at: break_lease include/linux/fs.h:2487 [inline] #0: ffffffff8bf4cc10 (file_rwsem){.+.+}-{0:0}, at: do_dentry_open+0x432/0x11e0 fs/open.c:815 #1: ffff888076fe74e8 (&ctx->flc_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #1: ffff888076fe74e8 (&ctx->flc_lock){+.+.}-{2:2}, at: __break_lease+0x208/0x1420 fs/locks.c:1452 #2: ffffffff8bd85460 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x41/0x470 fs/fcntl.c:1015 #3: ffff88801a74e408 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:996 [inline] #3: ffff88801a74e408 (&new->fa_lock){...-}-{2:2}, at: kill_fasync fs/fcntl.c:1017 [inline] #3: ffff88801a74e408 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x136/0x470 fs/fcntl.c:1010 #4: ffff88807ac7a630 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x24/0x380 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 kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 snd_timer_notify sound/core/timer.c:1086 [inline] snd_timer_notify+0x10c/0x3d0 sound/core/timer.c:1073 snd_pcm_timer_notify sound/core/pcm_native.c:608 [inline] snd_pcm_post_stop+0x195/0x1f0 sound/core/pcm_native.c:1512 snd_pcm_action_single+0xf4/0x130 sound/core/pcm_native.c:1283 snd_pcm_action+0x6e/0x90 sound/core/pcm_native.c:1364 __snd_pcm_xrun+0x150/0x650 sound/core/pcm_lib.c:155 snd_pcm_update_state+0x4ad/0x540 sound/core/pcm_lib.c:196 snd_pcm_update_hw_ptr0+0xa75/0x1a50 sound/core/pcm_lib.c:465 snd_pcm_period_elapsed_under_stream_lock+0x15a/0x230 sound/core/pcm_lib.c:1817 snd_pcm_period_elapsed+0x28/0x50 sound/core/pcm_lib.c:1849 loopback_jiffies_timer_function+0x1c4/0x240 sound/drivers/aloop.c:668 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x679/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649 get_current arch/x86/include/asm/current.h:15 [inline] __syscall_enter_from_user_work kernel/entry/common.c:89 [inline] syscall_enter_from_user_mode+0x2b/0x70 kernel/entry/common.c:110 do_syscall_64+0x16/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x46/0xb0 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:374 [inline] snd_timer_close_locked+0x63/0xbb0 sound/core/timer.c:396 snd_timer_close+0x87/0xf0 sound/core/timer.c:463 snd_seq_timer_close+0x8c/0xd0 sound/core/seq/seq_timer.c:326 queue_delete+0x4a/0xa0 sound/core/seq/seq_queue.c:134 snd_seq_queue_client_leave+0x37/0x1a0 sound/core/seq/seq_queue.c:565 seq_free_client1.part.0+0x10a/0x260 sound/core/seq/seq_clientmgr.c:280 seq_free_client1 sound/core/seq/seq_clientmgr.c:273 [inline] seq_free_client+0x7b/0xf0 sound/core/seq/seq_clientmgr.c:301 snd_seq_release+0x4d/0xe0 sound/core/seq/seq_clientmgr.c:382 __fput+0x277/0x9d0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 } ... key at: [] __key.10+0x0/0x40 -> (&new->fa_lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x136/0x470 fs/fcntl.c:1010 sock_wake_async+0xd2/0x160 net/socket.c:1372 sk_wake_async include/net/sock.h:2458 [inline] sk_wake_async include/net/sock.h:2454 [inline] sock_def_readable+0x349/0x4e0 net/core/sock.c:3164 tcp_data_ready+0x106/0x520 net/ipv4/tcp_input.c:4988 tcp_data_queue+0x25f2/0x4c90 net/ipv4/tcp_input.c:5062 tcp_rcv_state_process+0xc3c/0x4e10 net/ipv4/tcp_input.c:6642 tcp_v6_do_rcv+0x3f3/0x13b0 net/ipv6/tcp_ipv6.c:1501 tcp_v6_rcv+0x32c6/0x3810 net/ipv6/tcp_ipv6.c:1736 ip6_protocol_deliver_rcu+0x2e9/0x1910 net/ipv6/ip6_input.c:422 ip6_input_finish+0x14c/0x2c0 net/ipv6/ip6_input.c:464 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:473 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ipv6_rcv+0x27f/0x3b0 net/ipv6/ip6_input.c:297 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5402 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5516 process_backlog+0x3a0/0x7c0 net/core/dev.c:5844 __napi_poll+0xb3/0x6e0 net/core/dev.c:6410 napi_poll net/core/dev.c:6477 [inline] net_rx_action+0x8ec/0xc60 net/core/dev.c:6564 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326 fasync_remove_entry+0xb6/0x1e0 fs/fcntl.c:873 fasync_helper+0x9e/0xb0 fs/fcntl.c:976 sock_fasync+0x94/0x140 net/socket.c:1343 __fput+0x834/0x9d0 fs/file_table.c:314 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x136/0x470 fs/fcntl.c:1010 sock_wake_async+0xd2/0x160 net/socket.c:1372 sk_wake_async include/net/sock.h:2458 [inline] sk_wake_async include/net/sock.h:2454 [inline] tcp_rcv_state_process+0x3dba/0x4e10 net/ipv4/tcp_input.c:6521 tcp_v6_do_rcv+0x3f3/0x13b0 net/ipv6/tcp_ipv6.c:1501 sk_backlog_rcv include/net/sock.h:1051 [inline] __release_sock+0x134/0x3b0 net/core/sock.c:2794 release_sock+0x54/0x1b0 net/core/sock.c:3327 inet_wait_for_connect net/ipv4/af_inet.c:593 [inline] __inet_stream_connect+0x5db/0xed0 net/ipv4/af_inet.c:685 tcp_sendmsg_fastopen net/ipv4/tcp.c:1179 [inline] tcp_sendmsg_locked+0x1e9c/0x2fc0 net/ipv4/tcp.c:1221 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1449 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:652 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 __sys_sendto+0x21a/0x320 net/socket.c:2072 __do_sys_sendto net/socket.c:2084 [inline] __se_sys_sendto net/socket.c:2080 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2080 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 } ... key at: [] __key.0+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x136/0x470 fs/fcntl.c:1010 snd_timer_user_ccallback+0x298/0x330 sound/core/timer.c:1386 snd_timer_notify1+0x11c/0x3b0 sound/core/timer.c:516 snd_timer_start1+0x4d4/0x800 sound/core/timer.c:578 snd_timer_start sound/core/timer.c:696 [inline] snd_timer_start sound/core/timer.c:689 [inline] snd_timer_user_start.isra.0+0x1e3/0x260 sound/core/timer.c:1984 __snd_timer_user_ioctl.isra.0+0xda4/0x2490 sound/core/timer.c:2107 snd_timer_user_ioctl+0x77/0xb0 sound/core/timer.c:2128 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 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 kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236 send_sigurg+0x1e/0xaf0 fs/fcntl.c:817 sk_send_sigurg+0x76/0x310 net/core/sock.c:3198 tcp_check_urg net/ipv4/tcp_input.c:5597 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5638 tcp_rcv_established+0x81b/0x2020 net/ipv4/tcp_input.c:5976 tcp_v4_do_rcv+0x66c/0x980 net/ipv4/tcp_ipv4.c:1660 tcp_v4_rcv+0x319e/0x3780 net/ipv4/tcp_ipv4.c:2074 ip_protocol_deliver_rcu+0xa3/0x7c0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2ee/0x4c0 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:461 [inline] ip_rcv_finish+0x1cb/0x2f0 net/ipv4/ip_input.c:437 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:556 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5402 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5516 process_backlog+0x3a0/0x7c0 net/core/dev.c:5844 __napi_poll+0xb3/0x6e0 net/core/dev.c:6410 napi_poll net/core/dev.c:6477 [inline] net_rx_action+0x8ec/0xc60 net/core/dev.c:6564 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326 f_modown+0x2a/0x390 fs/fcntl.c:91 __f_setown fs/fcntl.c:110 [inline] f_setown+0xd7/0x230 fs/fcntl.c:138 do_fcntl+0x748/0x10b0 fs/fcntl.c:377 __do_sys_fcntl fs/fcntl.c:454 [inline] __se_sys_fcntl fs/fcntl.c:439 [inline] __x64_sys_fcntl+0x15f/0x1d0 fs/fcntl.c:439 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigurg+0x1e/0xaf0 fs/fcntl.c:817 sk_send_sigurg+0x76/0x310 net/core/sock.c:3198 queue_oob net/unix/af_unix.c:2089 [inline] unix_stream_sendmsg+0xdad/0x10b0 net/unix/af_unix.c:2189 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x6eb/0x810 net/socket.c:2445 ___sys_sendmsg+0xf3/0x170 net/socket.c:2499 __sys_sendmsg net/socket.c:2528 [inline] __do_sys_sendmsg net/socket.c:2537 [inline] __se_sys_sendmsg net/socket.c:2535 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2535 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 } ... key at: [] __key.5+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigio+0x24/0x380 fs/fcntl.c:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x1f8/0x470 fs/fcntl.c:1010 sock_wake_async+0xd2/0x160 net/socket.c:1372 sk_wake_async include/net/sock.h:2458 [inline] sk_wake_async include/net/sock.h:2454 [inline] tcp_rcv_state_process+0x3dba/0x4e10 net/ipv4/tcp_input.c:6521 tcp_v6_do_rcv+0x3f3/0x13b0 net/ipv6/tcp_ipv6.c:1501 sk_backlog_rcv include/net/sock.h:1051 [inline] __release_sock+0x134/0x3b0 net/core/sock.c:2794 release_sock+0x54/0x1b0 net/core/sock.c:3327 inet_wait_for_connect net/ipv4/af_inet.c:593 [inline] __inet_stream_connect+0x5db/0xed0 net/ipv4/af_inet.c:685 tcp_sendmsg_fastopen net/ipv4/tcp.c:1179 [inline] tcp_sendmsg_locked+0x1e9c/0x2fc0 net/ipv4/tcp.c:1221 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1449 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:652 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 __sys_sendto+0x21a/0x320 net/socket.c:2072 __do_sys_sendto net/socket.c:2084 [inline] __se_sys_sendto net/socket.c:2080 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2080 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 do_wait+0x284/0xce0 kernel/exit.c:1508 kernel_wait+0x9c/0x150 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 do_wait+0x284/0xce0 kernel/exit.c:1508 kernel_wait+0x9c/0x150 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326 copy_process+0x436c/0x6ff0 kernel/fork.c:2373 kernel_clone+0xe7/0xab0 kernel/fork.c:2644 kernel_thread+0xb5/0xf0 kernel/fork.c:2696 rest_init+0x23/0x270 init/main.c:691 arch_call_rest_init+0xf/0x14 init/main.c:882 start_kernel+0x46e/0x48f init/main.c:1137 secondary_startup_64_no_verify+0xce/0xdb INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 do_wait+0x284/0xce0 kernel/exit.c:1508 kernel_wait+0x9c/0x150 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 send_sigio+0xab/0x380 fs/fcntl.c:792 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x1f8/0x470 fs/fcntl.c:1010 lease_break_callback+0x1f/0x30 fs/locks.c:507 __break_lease+0x3d7/0x1420 fs/locks.c:1480 break_lease include/linux/fs.h:2497 [inline] break_lease include/linux/fs.h:2487 [inline] do_dentry_open+0x432/0x11e0 fs/open.c:815 do_open fs/namei.c:3477 [inline] path_openat+0x1c71/0x2910 fs/namei.c:3610 do_filp_open+0x1aa/0x400 fs/namei.c:3637 do_sys_openat2+0x16d/0x4c0 fs/open.c:1213 do_sys_open fs/open.c:1229 [inline] __do_sys_open fs/open.c:1237 [inline] __se_sys_open fs/open.c:1233 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1233 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 stack backtrace: CPU: 1 PID: 4366 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-02752-gfdaf9a5840ac #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+0xcd/0x134 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2578 [inline] check_irq_usage.cold+0x4c1/0x6b0 kernel/locking/lockdep.c:2817 check_prev_add kernel/locking/lockdep.c:3068 [inline] check_prevs_add kernel/locking/lockdep.c:3183 [inline] validate_chain kernel/locking/lockdep.c:3798 [inline] __lock_acquire+0x2ade/0x56c0 kernel/locking/lockdep.c:5022 lock_acquire kernel/locking/lockdep.c:5634 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 send_sigio+0xab/0x380 fs/fcntl.c:792 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x1f8/0x470 fs/fcntl.c:1010 lease_break_callback+0x1f/0x30 fs/locks.c:507 __break_lease+0x3d7/0x1420 fs/locks.c:1480 break_lease include/linux/fs.h:2497 [inline] break_lease include/linux/fs.h:2487 [inline] do_dentry_open+0x432/0x11e0 fs/open.c:815 do_open fs/namei.c:3477 [inline] path_openat+0x1c71/0x2910 fs/namei.c:3610 do_filp_open+0x1aa/0x400 fs/namei.c:3637 do_sys_openat2+0x16d/0x4c0 fs/open.c:1213 do_sys_open fs/open.c:1229 [inline] __do_sys_open fs/open.c:1237 [inline] __se_sys_open fs/open.c:1233 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1233 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f9976e89109 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:00007f9975dfe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f9976f9bf60 RCX: 00007f9976e89109 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007f9976ee308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f99774cfb1f R14: 00007f9975dfe300 R15: 0000000000022000