===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.10.0-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.1/18497 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff88806ee25938 (&f->f_owner.lock){.+.?}-{2:2}, at: send_sigio+0x24/0x3a0 fs/fcntl.c:787 and this task is already holding: ffff8880786af9f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1004 [inline] ffff8880786af9f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1025 [inline] ffff8880786af9f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x1a1/0x4c0 fs/fcntl.c:1018 which would create a new lock dependency: (&new->fa_lock){....}-{2:2} -> (&f->f_owner.lock){.+.?}-{2:2} but this new dependency connects a SOFTIRQ-irq-safe lock: (fasync_lock){+.+.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] fasync_remove_entry+0x2e/0x1f0 fs/fcntl.c:877 fasync_helper+0x9e/0xb0 fs/fcntl.c:985 __tty_fasync drivers/tty/tty_io.c:2130 [inline] tty_release+0x16d/0x1210 drivers/tty/tty_io.c:1668 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 to a SOFTIRQ-irq-unsafe lock: (&f->f_owner.lock){.+.?}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:231 send_sigurg+0x1e/0xba0 fs/fcntl.c:826 sk_send_sigurg+0x76/0x360 net/core/sock.c:2938 tcp_check_urg.isra.0+0x1f4/0x710 net/ipv4/tcp_input.c:5508 tcp_urg net/ipv4/tcp_input.c:5549 [inline] tcp_rcv_established+0x1089/0x1ef0 net/ipv4/tcp_input.c:5883 tcp_v6_do_rcv+0x41d/0x12b0 net/ipv6/tcp_ipv6.c:1482 tcp_v6_rcv+0x2b90/0x34e0 net/ipv6/tcp_ipv6.c:1715 ip6_protocol_deliver_rcu+0x2e8/0x16a0 net/ipv6/ip6_input.c:433 ip6_input_finish+0x9c/0x1a0 net/ipv6/ip6_input.c:474 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:483 dst_input include/net/dst.h:447 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ipv6_rcv+0x28e/0x3c0 net/ipv6/ip6_input.c:307 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5323 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5437 process_backlog+0x252/0x700 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x461/0xe60 net/core/dev.c:6888 __do_softirq+0x2bc/0xa77 kernel/softirq.c:343 run_ksoftirqd kernel/softirq.c:650 [inline] run_ksoftirqd+0x2d/0x50 kernel/softirq.c:642 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:165 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 other info that might help us debug this: Chain exists of: fasync_lock --> &new->fa_lock --> &f->f_owner.lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&f->f_owner.lock); local_irq_disable(); lock(fasync_lock); lock(&new->fa_lock); lock(fasync_lock); *** DEADLOCK *** 8 locks held by syz-executor.1/18497: #0: ffff88801f38b110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d2/0x780 drivers/input/evdev.c:513 #1: ffff88801f074230 (&dev->event_lock){-...}-{2:2}, at: input_inject_event+0xa6/0x390 drivers/input/input.c:471 #2: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline] #2: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline] #2: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x92/0x390 drivers/input/input.c:470 #3: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x760 drivers/input/input.c:889 #4: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x59/0x490 drivers/input/evdev.c:296 #5: ffff888014d7f028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #5: ffff888014d7f028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261 #6: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x3d/0x4c0 fs/fcntl.c:1023 #7: ffff8880786af9f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1004 [inline] #7: ffff8880786af9f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1025 [inline] #7: ffff8880786af9f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x1a1/0x4c0 fs/fcntl.c:1018 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (fasync_lock){+.+.}-{2:2} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] fasync_remove_entry+0x2e/0x1f0 fs/fcntl.c:877 fasync_helper+0x9e/0xb0 fs/fcntl.c:985 __tty_fasync drivers/tty/tty_io.c:2130 [inline] tty_release+0x16d/0x1210 drivers/tty/tty_io.c:1668 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 SOFTIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] fasync_remove_entry+0x2e/0x1f0 fs/fcntl.c:877 fasync_helper+0x9e/0xb0 fs/fcntl.c:985 __tty_fasync drivers/tty/tty_io.c:2130 [inline] tty_release+0x16d/0x1210 drivers/tty/tty_io.c:1668 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] fasync_remove_entry+0x2e/0x1f0 fs/fcntl.c:877 fasync_helper+0x9e/0xb0 fs/fcntl.c:985 __tty_fasync drivers/tty/tty_io.c:2130 [inline] tty_release+0x16d/0x1210 drivers/tty/tty_io.c:1668 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 } ... key at: [] fasync_lock+0x18/0xb20 ... acquired at: __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:311 fasync_remove_entry+0xb6/0x1f0 fs/fcntl.c:882 fasync_helper+0x9e/0xb0 fs/fcntl.c:985 __tty_fasync drivers/tty/tty_io.c:2130 [inline] __tty_hangup.part.0+0x2d8/0x870 drivers/tty/tty_io.c:614 __tty_hangup drivers/tty/tty_io.c:574 [inline] tty_vhangup+0x1d/0x30 drivers/tty/tty_io.c:697 pty_close+0x3f5/0x550 drivers/tty/pty.c:79 tty_release+0x45e/0x1210 drivers/tty/tty_io.c:1683 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:311 fasync_remove_entry+0xb6/0x1f0 fs/fcntl.c:882 fasync_helper+0x9e/0xb0 fs/fcntl.c:985 __tty_fasync drivers/tty/tty_io.c:2130 [inline] __tty_hangup.part.0+0x2d8/0x870 drivers/tty/tty_io.c:614 __tty_hangup drivers/tty/tty_io.c:574 [inline] tty_vhangup+0x1d/0x30 drivers/tty/tty_io.c:697 pty_close+0x3f5/0x550 drivers/tty/pty.c:79 tty_release+0x45e/0x1210 drivers/tty/tty_io.c:1683 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x1a1/0x4c0 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x328/0x490 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x2e4/0x760 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x39b/0x1470 drivers/input/input.c:404 input_inject_event+0x36a/0x390 drivers/input/input.c:476 evdev_write+0x463/0x780 drivers/input/evdev.c:530 vfs_write+0x28e/0xa80 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 } ... key at: [] __key.0+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231 send_sigio+0x24/0x3a0 fs/fcntl.c:787 kill_fasync_rcu fs/fcntl.c:1011 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x25b/0x4c0 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x328/0x490 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x2e4/0x760 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x39b/0x1470 drivers/input/input.c:404 input_inject_event+0x36a/0x390 drivers/input/input.c:476 evdev_write+0x463/0x780 drivers/input/evdev.c:530 vfs_write+0x28e/0xa80 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (&f->f_owner.lock){.+.?}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 f_getown_ex fs/fcntl.c:206 [inline] do_fcntl+0x8e0/0x10e0 fs/fcntl.c:387 __do_sys_fcntl fs/fcntl.c:463 [inline] __se_sys_fcntl fs/fcntl.c:448 [inline] __x64_sys_fcntl+0x165/0x1e0 fs/fcntl.c:448 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 IN-SOFTIRQ-R at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:231 send_sigurg+0x1e/0xba0 fs/fcntl.c:826 sk_send_sigurg+0x76/0x360 net/core/sock.c:2938 tcp_check_urg.isra.0+0x1f4/0x710 net/ipv4/tcp_input.c:5508 tcp_urg net/ipv4/tcp_input.c:5549 [inline] tcp_rcv_established+0x1089/0x1ef0 net/ipv4/tcp_input.c:5883 tcp_v6_do_rcv+0x41d/0x12b0 net/ipv6/tcp_ipv6.c:1482 tcp_v6_rcv+0x2b90/0x34e0 net/ipv6/tcp_ipv6.c:1715 ip6_protocol_deliver_rcu+0x2e8/0x16a0 net/ipv6/ip6_input.c:433 ip6_input_finish+0x9c/0x1a0 net/ipv6/ip6_input.c:474 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:483 dst_input include/net/dst.h:447 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ipv6_rcv+0x28e/0x3c0 net/ipv6/ip6_input.c:307 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5323 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5437 process_backlog+0x252/0x700 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x461/0xe60 net/core/dev.c:6888 __do_softirq+0x2bc/0xa77 kernel/softirq.c:343 run_ksoftirqd kernel/softirq.c:650 [inline] run_ksoftirqd+0x2d/0x50 kernel/softirq.c:642 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:165 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 f_getown_ex fs/fcntl.c:206 [inline] do_fcntl+0x8e0/0x10e0 fs/fcntl.c:387 __do_sys_fcntl fs/fcntl.c:463 [inline] __se_sys_fcntl fs/fcntl.c:448 [inline] __x64_sys_fcntl+0x165/0x1e0 fs/fcntl.c:448 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:311 f_modown+0x2a/0x3d0 fs/fcntl.c:90 __tty_fasync drivers/tty/tty_io.c:2148 [inline] tty_fasync+0x295/0x390 drivers/tty/tty_io.c:2163 setfl fs/fcntl.c:73 [inline] do_fcntl+0x667/0x10e0 fs/fcntl.c:347 __do_sys_fcntl fs/fcntl.c:463 [inline] __se_sys_fcntl fs/fcntl.c:448 [inline] __x64_sys_fcntl+0x165/0x1e0 fs/fcntl.c:448 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231 send_sigio+0x24/0x3a0 fs/fcntl.c:787 dnotify_handle_event+0x148/0x280 fs/notify/dnotify/dnotify.c:97 fsnotify_handle_inode_event.isra.0+0x1b8/0x270 fs/notify/fsnotify.c:263 fsnotify_handle_event fs/notify/fsnotify.c:310 [inline] send_to_group fs/notify/fsnotify.c:364 [inline] fsnotify+0xc16/0x1090 fs/notify/fsnotify.c:541 fsnotify_parent include/linux/fsnotify.h:71 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_access include/linux/fsnotify.h:247 [inline] iterate_dir+0x564/0x660 fs/readdir.c:69 __do_sys_getdents64 fs/readdir.c:366 [inline] __se_sys_getdents64 fs/readdir.c:351 [inline] __x64_sys_getdents64+0x13a/0x2c0 fs/readdir.c:351 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 } ... key at: [] __key.5+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231 send_sigio+0x24/0x3a0 fs/fcntl.c:787 kill_fasync_rcu fs/fcntl.c:1011 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x25b/0x4c0 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x328/0x490 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x2e4/0x760 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x39b/0x1470 drivers/input/input.c:404 input_inject_event+0x36a/0x390 drivers/input/input.c:476 evdev_write+0x463/0x780 drivers/input/evdev.c:530 vfs_write+0x28e/0xa80 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 stack backtrace: CPU: 0 PID: 18497 Comm: syz-executor.1 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 print_bad_irq_dependency kernel/locking/lockdep.c:2452 [inline] check_irq_usage.cold+0x50d/0x744 kernel/locking/lockdep.c:2681 check_prev_add kernel/locking/lockdep.c:2872 [inline] check_prevs_add kernel/locking/lockdep.c:2993 [inline] validate_chain kernel/locking/lockdep.c:3608 [inline] __lock_acquire+0x2b51/0x54b0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231 send_sigio+0x24/0x3a0 fs/fcntl.c:787 kill_fasync_rcu fs/fcntl.c:1011 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x25b/0x4c0 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x328/0x490 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x2e4/0x760 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x39b/0x1470 drivers/input/input.c:404 input_inject_event+0x36a/0x390 drivers/input/input.c:476 evdev_write+0x463/0x780 drivers/input/evdev.c:530 vfs_write+0x28e/0xa80 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7889eefc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e149 RDX: 0000000000000214 RSI: 00000000200001c0 RDI: 0000000000000004 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffd9a30eeaf R14: 00007f7889ef09c0 R15: 000000000119bf8c