===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.15.129-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.1/17071 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8c60a058 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xd2/0x330 fs/fcntl.c:810 and this task is already holding: ffff88805ae4b538 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x2f/0x330 fs/fcntl.c:796 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: (&client->buffer_lock){..-.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261 evdev_events+0x198/0x2c0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x873/0x1200 drivers/input/input.c:156 input_handle_event+0xd3d/0x1600 drivers/input/input.c:426 input_inject_event+0x1fc/0x300 drivers/input/input.c:487 led_trigger_event+0x64/0xc0 drivers/leds/led-triggers.c:388 kbd_propagate_led_state drivers/tty/vt/keyboard.c:1075 [inline] kbd_bh+0x18a/0x260 drivers/tty/vt/keyboard.c:1259 tasklet_action_common+0x3cb/0x4a0 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x155/0x240 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:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 check_kcov_mode kernel/kcov.c:165 [inline] write_comp_data kernel/kcov.c:218 [inline] __sanitizer_cov_trace_const_cmp4+0x30/0x80 kernel/kcov.c:284 fast_imageblit drivers/video/fbdev/core/sysimgblt.c:262 [inline] sys_imageblit+0x1c49/0x2a10 drivers/video/fbdev/core/sysimgblt.c:323 drm_fb_helper_sys_imageblit+0x2e/0x510 drivers/gpu/drm/drm_fb_helper.c:794 bit_putcs+0x18b2/0x1da0 fbcon_putcs+0x2ca/0x450 drivers/video/fbdev/core/fbcon.c:1293 do_update_region+0x537/0x780 drivers/tty/vt/vt.c:676 csi_J+0x97c/0xe60 drivers/tty/vt/vt.c:1585 do_con_trol drivers/tty/vt/vt.c:2280 [inline] do_con_write+0x401f/0x7270 drivers/tty/vt/vt.c:2951 con_write+0x20/0x40 drivers/tty/vt/vt.c:3295 process_output_block drivers/tty/n_tty.c:592 [inline] n_tty_write+0xd7e/0x1280 drivers/tty/n_tty.c:2339 do_tty_write drivers/tty/tty_io.c:1038 [inline] file_tty_write+0x561/0x920 drivers/tty/tty_io.c:1110 call_write_iter include/linux/fs.h:2103 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacf/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb to a SOFTIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2a7/0xaf0 kernel/exit.c:1576 kernel_wait+0xe5/0x230 kernel/exit.c:1766 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 other info that might help us debug this: Chain exists of: &client->buffer_lock --> &f->f_owner.lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&client->buffer_lock); lock(&f->f_owner.lock); lock(&client->buffer_lock); *** DEADLOCK *** 5 locks held by syz-executor.1/17071: #0: ffff88802eeeac10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff88802eeeac10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:648 [inline] #0: ffff88802eeeac10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x98/0x230 net/socket.c:1317 #1: ffffffff8c91f0e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:268 #2: ffffffff8c91f0e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:268 #3: ffff8880408d3b40 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1014 [inline] #3: ffff8880408d3b40 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x16a/0x490 fs/fcntl.c:1035 #4: ffff88805ae4b538 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x2f/0x330 fs/fcntl.c:796 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&client->buffer_lock){..-.}-{2:2} { IN-SOFTIRQ-W at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261 evdev_events+0x198/0x2c0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x873/0x1200 drivers/input/input.c:156 input_handle_event+0xd3d/0x1600 drivers/input/input.c:426 input_inject_event+0x1fc/0x300 drivers/input/input.c:487 led_trigger_event+0x64/0xc0 drivers/leds/led-triggers.c:388 kbd_propagate_led_state drivers/tty/vt/keyboard.c:1075 [inline] kbd_bh+0x18a/0x260 drivers/tty/vt/keyboard.c:1259 tasklet_action_common+0x3cb/0x4a0 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x155/0x240 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:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 check_kcov_mode kernel/kcov.c:165 [inline] write_comp_data kernel/kcov.c:218 [inline] __sanitizer_cov_trace_const_cmp4+0x30/0x80 kernel/kcov.c:284 fast_imageblit drivers/video/fbdev/core/sysimgblt.c:262 [inline] sys_imageblit+0x1c49/0x2a10 drivers/video/fbdev/core/sysimgblt.c:323 drm_fb_helper_sys_imageblit+0x2e/0x510 drivers/gpu/drm/drm_fb_helper.c:794 bit_putcs+0x18b2/0x1da0 fbcon_putcs+0x2ca/0x450 drivers/video/fbdev/core/fbcon.c:1293 do_update_region+0x537/0x780 drivers/tty/vt/vt.c:676 csi_J+0x97c/0xe60 drivers/tty/vt/vt.c:1585 do_con_trol drivers/tty/vt/vt.c:2280 [inline] do_con_write+0x401f/0x7270 drivers/tty/vt/vt.c:2951 con_write+0x20/0x40 drivers/tty/vt/vt.c:3295 process_output_block drivers/tty/n_tty.c:592 [inline] n_tty_write+0xd7e/0x1280 drivers/tty/n_tty.c:2339 do_tty_write drivers/tty/tty_io.c:1038 [inline] file_tty_write+0x561/0x920 drivers/tty/tty_io.c:1110 call_write_iter include/linux/fs.h:2103 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacf/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261 evdev_events+0x198/0x2c0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x873/0x1200 drivers/input/input.c:156 input_handle_event+0xd3d/0x1600 drivers/input/input.c:426 input_inject_event+0x1fc/0x300 drivers/input/input.c:487 kbd_rate_helper+0xc4/0x250 drivers/tty/vt/keyboard.c:298 input_handler_for_each_handle+0xd5/0x190 drivers/input/input.c:2481 kbd_rate+0x120/0x260 drivers/tty/vt/keyboard.c:315 vt_k_ioctl drivers/tty/vt/vt_ioctl.c:368 [inline] vt_ioctl+0x1761/0x1d10 drivers/tty/vt/vt_ioctl.c:752 tty_ioctl+0x871/0xc50 drivers/tty/tty_io.c:2807 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb } ... key at: [] evdev_open.__key.23+0x0/0x20 -> (&new->fa_lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1014 [inline] kill_fasync+0x16a/0x490 fs/fcntl.c:1035 sock_wake_async+0x145/0x170 sk_wake_async+0x15d/0x250 include/net/sock.h:2440 sock_def_readable+0x181/0x240 net/core/sock.c:3074 tcp_data_queue+0x2146/0x6f20 net/ipv4/tcp_input.c:5071 tcp_rcv_state_process+0x2c18/0x44b0 net/ipv4/tcp_input.c:6632 tcp_v6_do_rcv+0x867/0x10f0 net/ipv6/tcp_ipv6.c:1551 tcp_v6_rcv+0x2220/0x27b0 net/ipv6/tcp_ipv6.c:1767 ip6_protocol_deliver_rcu+0x93d/0x12d0 net/ipv6/ip6_input.c:425 ip6_input_finish+0xa2/0x130 net/ipv6/ip6_input.c:466 NF_HOOK+0x364/0x410 include/linux/netfilter.h:302 NF_HOOK+0x364/0x410 include/linux/netfilter.h:302 __netif_receive_skb_one_core net/core/dev.c:5462 [inline] __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5576 process_backlog+0x363/0x7f0 net/core/dev.c:6453 __napi_poll+0xc7/0x440 net/core/dev.c:7012 napi_poll net/core/dev.c:7079 [inline] net_rx_action+0x617/0xda0 net/core/dev.c:7166 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:921 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316 fasync_remove_entry+0xfb/0x1d0 fs/fcntl.c:891 sock_fasync+0x86/0xf0 net/socket.c:1342 __fput+0x715/0x890 fs/file_table.c:277 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb INITIAL READ USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1014 [inline] kill_fasync+0x16a/0x490 fs/fcntl.c:1035 sock_wake_async+0x145/0x170 sk_wake_async+0x15d/0x250 include/net/sock.h:2440 tcp_rcv_state_process+0x2069/0x44b0 net/ipv4/tcp_input.c:6511 tcp_v6_do_rcv+0x867/0x10f0 net/ipv6/tcp_ipv6.c:1551 sk_backlog_rcv include/net/sock.h:1059 [inline] __release_sock+0x198/0x4b0 net/core/sock.c:2704 release_sock+0x5d/0x1c0 net/core/sock.c:3245 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1463 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] __sys_sendto+0x564/0x720 net/socket.c:2039 __do_sys_sendto net/socket.c:2051 [inline] __se_sys_sendto net/socket.c:2047 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2047 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb } ... key at: [] fasync_insert_entry.__key+0x0/0x20 ... acquired at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1014 [inline] kill_fasync+0x16a/0x490 fs/fcntl.c:1035 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x5ad/0xb60 drivers/input/evdev.c:278 evdev_events+0x198/0x2c0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x873/0x1200 drivers/input/input.c:156 input_handle_event+0xc9b/0x1600 drivers/input/input.c:415 input_inject_event+0x1fc/0x300 drivers/input/input.c:487 evdev_write+0x668/0x7c0 drivers/input/evdev.c:530 vfs_write+0x30c/0xe50 fs/read_write.c:592 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> (&f->f_owner.lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigurg+0x25/0x380 fs/fcntl.c:835 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3108 tcp_check_urg net/ipv4/tcp_input.c:5592 [inline] tcp_urg+0x2b8/0xb40 net/ipv4/tcp_input.c:5633 tcp_rcv_established+0xe33/0x1e20 net/ipv4/tcp_input.c:5967 tcp_v4_do_rcv+0x423/0x960 net/ipv4/tcp_ipv4.c:1727 tcp_v4_rcv+0x2740/0x2d80 net/ipv4/tcp_ipv4.c:2129 ip_protocol_deliver_rcu+0x381/0x730 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1db/0x320 net/ipv4/ip_input.c:231 NF_HOOK+0x364/0x410 include/linux/netfilter.h:302 NF_HOOK+0x364/0x410 include/linux/netfilter.h:302 __netif_receive_skb_one_core net/core/dev.c:5462 [inline] __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5576 process_backlog+0x363/0x7f0 net/core/dev.c:6453 __napi_poll+0xc7/0x440 net/core/dev.c:7012 napi_poll net/core/dev.c:7079 [inline] net_rx_action+0x617/0xda0 net/core/dev.c:7166 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:921 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316 f_modown+0x38/0x340 fs/fcntl.c:91 __f_setown fs/fcntl.c:110 [inline] f_setown+0x127/0x1d0 fs/fcntl.c:138 do_fcntl+0x1b7/0x1600 fs/fcntl.c:393 __do_sys_fcntl fs/fcntl.c:472 [inline] __se_sys_fcntl+0xd8/0x1b0 fs/fcntl.c:457 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb INITIAL READ USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline] _raw_read_lock_irq+0xd6/0x120 kernel/locking/spinlock.c:244 f_getown+0x22/0x240 fs/fcntl.c:154 sock_ioctl+0x3ee/0x770 net/socket.c:1185 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb } ... key at: [] __alloc_file.__key+0x0/0x10 ... acquired at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigio+0x2f/0x330 fs/fcntl.c:796 kill_fasync_rcu fs/fcntl.c:1021 [inline] kill_fasync+0x20c/0x490 fs/fcntl.c:1035 sock_wake_async+0x145/0x170 sk_wake_async+0x15d/0x250 include/net/sock.h:2440 tcp_rcv_state_process+0x2069/0x44b0 net/ipv4/tcp_input.c:6511 tcp_v6_do_rcv+0x867/0x10f0 net/ipv6/tcp_ipv6.c:1551 sk_backlog_rcv include/net/sock.h:1059 [inline] __release_sock+0x198/0x4b0 net/core/sock.c:2704 release_sock+0x5d/0x1c0 net/core/sock.c:3245 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1463 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] __sys_sendto+0x564/0x720 net/socket.c:2039 __do_sys_sendto net/socket.c:2051 [inline] __se_sys_sendto net/socket.c:2047 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2047 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2a7/0xaf0 kernel/exit.c:1576 kernel_wait+0xe5/0x230 kernel/exit.c:1766 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 SOFTIRQ-ON-R at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2a7/0xaf0 kernel/exit.c:1576 kernel_wait+0xe5/0x230 kernel/exit.c:1766 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316 copy_process+0x22be/0x3ef0 kernel/fork.c:2329 kernel_clone+0x210/0x960 kernel/fork.c:2596 kernel_thread+0x168/0x1e0 kernel/fork.c:2648 rest_init+0x21/0x330 init/main.c:699 start_kernel+0x48c/0x535 init/main.c:1133 secondary_startup_64_no_verify+0xb1/0xbb INITIAL READ USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2a7/0xaf0 kernel/exit.c:1576 kernel_wait+0xe5/0x230 kernel/exit.c:1766 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigio+0xd2/0x330 fs/fcntl.c:810 kill_fasync_rcu fs/fcntl.c:1021 [inline] kill_fasync+0x20c/0x490 fs/fcntl.c:1035 sock_wake_async+0x145/0x170 sk_wake_async+0x15d/0x250 include/net/sock.h:2440 unix_release_sock+0x535/0xaa0 net/unix/af_unix.c:571 unix_release+0x88/0xc0 net/unix/af_unix.c:950 __sock_release net/socket.c:649 [inline] sock_close+0xcd/0x230 net/socket.c:1317 __fput+0x3bf/0x890 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:164 get_signal+0x143a/0x14e0 kernel/signal.c:2661 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb stack backtrace: CPU: 0 PID: 17071 Comm: syz-executor.1 Not tainted 5.15.129-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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:2567 [inline] check_irq_usage kernel/locking/lockdep.c:2806 [inline] check_prev_add kernel/locking/lockdep.c:3057 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x4cfe/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigio+0xd2/0x330 fs/fcntl.c:810 kill_fasync_rcu fs/fcntl.c:1021 [inline] kill_fasync+0x20c/0x490 fs/fcntl.c:1035 sock_wake_async+0x145/0x170 sk_wake_async+0x15d/0x250 include/net/sock.h:2440 unix_release_sock+0x535/0xaa0 net/unix/af_unix.c:571 unix_release+0x88/0xc0 net/unix/af_unix.c:950 __sock_release net/socket.c:649 [inline] sock_close+0xcd/0x230 net/socket.c:1317 __fput+0x3bf/0x890 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:164 get_signal+0x143a/0x14e0 kernel/signal.c:2661 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3d524e5ae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3d50a670c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 RAX: fffffffffffffdfc RBX: 00007f3d52604f80 RCX: 00007f3d524e5ae9 RDX: fffffffffffffff8 RSI: 0000000000000001 RDI: 0000000020b2c000 RBP: 00007f3d5253147a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f3d52604f80 R15: 00007ffc1829b048