===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.10.0-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.5/14105 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff8880206323b8 (&f->f_owner.lock){.+.?}-{2:2}, at: send_sigio+0x24/0x3a0 fs/fcntl.c:787 and this task is already holding: ffff8880288fe360 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1004 [inline] ffff8880288fe360 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1025 [inline] ffff8880288fe360 (&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_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1676 tcp_v4_rcv+0x2d8d/0x37b0 net/ipv4/tcp_ipv4.c:2058 ip_protocol_deliver_rcu+0x5c/0x8c0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x240/0x3a0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:539 __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.5/14105: #0: ffff88801dbca110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d2/0x780 drivers/input/evdev.c:513 #1: ffff888144ce2230 (&dev->event_lock){-...}-{2:2}, at: input_inject_event+0xa6/0x390 drivers/input/input.c:471 #2: ffffffff8b793de0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline] #2: ffffffff8b793de0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline] #2: ffffffff8b793de0 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x92/0x390 drivers/input/input.c:470 #3: ffffffff8b793de0 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x760 drivers/input/input.c:889 #4: ffffffff8b793de0 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x59/0x490 drivers/input/evdev.c:296 #5: ffff888063df3028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #5: ffff888063df3028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261 #6: ffffffff8b793de0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x3d/0x4c0 fs/fcntl.c:1023 #7: ffff8880288fe360 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1004 [inline] #7: ffff8880288fe360 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1025 [inline] #7: ffff8880288fe360 (&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 sock_fasync+0x94/0x140 net/socket.c:1281 __fput+0x70d/0x920 fs/file_table.c:277 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 __do_fast_syscall_32+0x62/0x80 arch/x86/entry/common.c:138 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c -> (&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 sock_fasync+0x94/0x140 net/socket.c:1281 __fput+0x70d/0x920 fs/file_table.c:277 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 __do_fast_syscall_32+0x62/0x80 arch/x86/entry/common.c:138 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c 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_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c } ... 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_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c 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_compat_fcntl64+0x2ce/0x610 fs/fcntl.c:667 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c 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_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1676 tcp_v4_rcv+0x2d8d/0x37b0 net/ipv4/tcp_ipv4.c:2058 ip_protocol_deliver_rcu+0x5c/0x8c0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x240/0x3a0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:539 __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_compat_fcntl64+0x2ce/0x610 fs/fcntl.c:667 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c 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 __f_setown fs/fcntl.c:109 [inline] f_setown+0x111/0x260 fs/fcntl.c:137 do_fcntl+0x749/0x10e0 fs/fcntl.c:384 do_compat_fcntl64+0x2ce/0x610 fs/fcntl.c:667 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c 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 f_getown_ex fs/fcntl.c:206 [inline] do_fcntl+0x8e0/0x10e0 fs/fcntl.c:387 do_compat_fcntl64+0x2ce/0x610 fs/fcntl.c:667 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c } ... 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_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c stack backtrace: CPU: 1 PID: 14105 Comm: syz-executor.5 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_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f48549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f55420cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000040 RDX: 00000000000002b8 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000