===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 5.13.0-rc2-next-20210518-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.3/25427 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888027bac948 (&new->fa_lock){.?.?}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1012 [inline] ffff888027bac948 (&new->fa_lock){.?.?}-{2:2}, at: kill_fasync fs/fcntl.c:1033 [inline] ffff888027bac948 (&new->fa_lock){.?.?}-{2:2}, at: kill_fasync+0x132/0x460 fs/fcntl.c:1026 and this task is already holding: ffff88807d999028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:359 [inline] ffff88807d999028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261 which would create a new lock dependency: (&client->buffer_lock){....}-{2:2} -> (&new->fa_lock){.?.?}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&evdev->mutex){+.+.}-{3:3} ... which became HARDIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __mutex_lock_common kernel/locking/mutex.c:949 [inline] __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1096 evdev_open_device drivers/input/evdev.c:393 [inline] evdev_open+0x2f3/0x6a0 drivers/input/evdev.c:487 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x4b9/0x11c0 fs/open.c:826 do_open fs/namei.c:3361 [inline] path_openat+0x1c09/0x27d0 fs/namei.c:3494 do_filp_open+0x190/0x3d0 fs/namei.c:3521 do_sys_openat2+0x16d/0x420 fs/open.c:1196 do_sys_open fs/open.c:1212 [inline] __do_sys_openat fs/open.c:1228 [inline] __se_sys_openat fs/open.c:1223 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1223 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae to a HARDIRQ-irq-unsafe lock: (&new->fa_lock){.?.?}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 perf_event_wakeup kernel/events/core.c:6385 [inline] perf_pending_event+0x432/0x560 kernel/events/core.c:6468 irq_work_single+0x120/0x1f0 kernel/irq_work.c:158 irq_work_run_list+0x91/0xc0 kernel/irq_work.c:180 irq_work_run+0x54/0xd0 kernel/irq_work.c:189 __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x40/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:673 other info that might help us debug this: Chain exists of: &evdev->mutex --> &client->buffer_lock --> &new->fa_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&new->fa_lock); local_irq_disable(); lock(&evdev->mutex); lock(&client->buffer_lock); lock(&evdev->mutex); *** DEADLOCK *** 7 locks held by syz-executor.3/25427: #0: ffff888022028110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d3/0x760 drivers/input/evdev.c:513 #1: ffff88814430c230 (&dev->event_lock){-...}-{2:2}, at: input_inject_event+0xa6/0x320 drivers/input/input.c:471 #2: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline] #2: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline] #2: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x92/0x320 drivers/input/input.c:470 #3: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: input_dev_toggle drivers/input/input.c:1712 [inline] #3: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x710 drivers/input/input.c:1832 #4: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x59/0x3e0 drivers/input/evdev.c:296 #5: ffff88807d999028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:359 [inline] #5: ffff88807d999028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261 #6: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x3d/0x460 fs/fcntl.c:1031 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&evdev->mutex){+.+.}-{3:3} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __mutex_lock_common kernel/locking/mutex.c:949 [inline] __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1096 evdev_open_device drivers/input/evdev.c:393 [inline] evdev_open+0x2f3/0x6a0 drivers/input/evdev.c:487 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x4b9/0x11c0 fs/open.c:826 do_open fs/namei.c:3361 [inline] path_openat+0x1c09/0x27d0 fs/namei.c:3494 do_filp_open+0x190/0x3d0 fs/namei.c:3521 do_sys_openat2+0x16d/0x420 fs/open.c:1196 do_sys_open fs/open.c:1212 [inline] __do_sys_openat fs/open.c:1228 [inline] __se_sys_openat fs/open.c:1223 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1223 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae SOFTIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __mutex_lock_common kernel/locking/mutex.c:949 [inline] __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1096 evdev_open_device drivers/input/evdev.c:393 [inline] evdev_open+0x2f3/0x6a0 drivers/input/evdev.c:487 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x4b9/0x11c0 fs/open.c:826 do_open fs/namei.c:3361 [inline] path_openat+0x1c09/0x27d0 fs/namei.c:3494 do_filp_open+0x190/0x3d0 fs/namei.c:3521 do_sys_openat2+0x16d/0x420 fs/open.c:1196 do_sys_open fs/open.c:1212 [inline] __do_sys_openat fs/open.c:1228 [inline] __se_sys_openat fs/open.c:1223 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1223 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __mutex_lock_common kernel/locking/mutex.c:949 [inline] __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1096 evdev_open_device drivers/input/evdev.c:393 [inline] evdev_open+0x2f3/0x6a0 drivers/input/evdev.c:487 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x4b9/0x11c0 fs/open.c:826 do_open fs/namei.c:3361 [inline] path_openat+0x1c09/0x27d0 fs/namei.c:3494 do_filp_open+0x190/0x3d0 fs/namei.c:3521 do_sys_openat2+0x16d/0x420 fs/open.c:1196 do_sys_open fs/open.c:1212 [inline] __do_sys_openat fs/open.c:1228 [inline] __se_sys_openat fs/open.c:1223 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1223 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] __key.6+0x0/0x40 ... acquired at: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159 evdev_set_mask drivers/input/evdev.c:980 [inline] evdev_do_ioctl+0x2d7/0x1820 drivers/input/evdev.c:1117 evdev_ioctl_handler drivers/input/evdev.c:1272 [inline] evdev_ioctl+0x145/0x1a0 drivers/input/evdev.c:1281 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159 evdev_set_mask drivers/input/evdev.c:980 [inline] evdev_do_ioctl+0x2d7/0x1820 drivers/input/evdev.c:1117 evdev_ioctl_handler drivers/input/evdev.c:1272 [inline] evdev_ioctl+0x145/0x1a0 drivers/input/evdev.c:1281 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] __key.4+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __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:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 __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+0x359/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x373/0x1440 drivers/input/input.c:404 input_inject_event+0x1bd/0x320 drivers/input/input.c:476 evdev_write+0x430/0x760 drivers/input/evdev.c:530 vfs_write+0x28e/0xa40 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (&new->fa_lock){.?.?}-{2:2} { IN-HARDIRQ-R at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 perf_event_wakeup kernel/events/core.c:6385 [inline] perf_pending_event+0x432/0x560 kernel/events/core.c:6468 irq_work_single+0x120/0x1f0 kernel/irq_work.c:158 irq_work_run_list+0x91/0xc0 kernel/irq_work.c:180 irq_work_run+0x54/0xd0 kernel/irq_work.c:189 __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x40/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:673 HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __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:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 fsnotify_add_event+0x3ba/0x500 fs/notify/notification.c:128 inotify_handle_inode_event+0x31b/0x5c0 fs/notify/inotify/inotify_fsnotify.c:119 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+0xc37/0x1060 fs/notify/fsnotify.c:541 fsnotify_parent include/linux/fsnotify.h:71 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_open include/linux/fsnotify.h:268 [inline] do_sys_openat2+0x3a3/0x420 fs/open.c:1201 do_sys_open fs/open.c:1212 [inline] __do_sys_open fs/open.c:1220 [inline] __se_sys_open fs/open.c:1216 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1216 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae IN-SOFTIRQ-R at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 perf_event_wakeup kernel/events/core.c:6385 [inline] perf_pending_event+0x432/0x560 kernel/events/core.c:6468 irq_work_single+0x120/0x1f0 kernel/irq_work.c:158 irq_work_run_list+0x91/0xc0 kernel/irq_work.c:180 irq_work_run+0x54/0xd0 kernel/irq_work.c:189 __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:673 ffs arch/x86/include/asm/bitops.h:297 [inline] __do_softirq+0x196/0x9fb kernel/softirq.c:547 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x45/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __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:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 fsnotify_add_event+0x3ba/0x500 fs/notify/notification.c:128 inotify_handle_inode_event+0x31b/0x5c0 fs/notify/inotify/inotify_fsnotify.c:119 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+0xc37/0x1060 fs/notify/fsnotify.c:541 fsnotify_parent include/linux/fsnotify.h:71 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_open include/linux/fsnotify.h:268 [inline] do_sys_openat2+0x3a3/0x420 fs/open.c:1201 do_sys_open fs/open.c:1212 [inline] __do_sys_open fs/open.c:1220 [inline] __se_sys_open fs/open.c:1216 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1216 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __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:890 fasync_helper+0x9e/0xb0 fs/fcntl.c:993 fsnotify_fasync+0x4d/0x80 fs/notify/group.c:162 __fput+0x712/0x920 fs/file_table.c:277 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 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+0x26f/0x280 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301 do_syscall_64+0x3e/0xb0 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __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:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 fsnotify_add_event+0x3ba/0x500 fs/notify/notification.c:128 inotify_handle_inode_event+0x31b/0x5c0 fs/notify/inotify/inotify_fsnotify.c:119 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+0xc37/0x1060 fs/notify/fsnotify.c:541 fsnotify_parent include/linux/fsnotify.h:71 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_open include/linux/fsnotify.h:268 [inline] do_sys_openat2+0x3a3/0x420 fs/open.c:1201 do_sys_open fs/open.c:1212 [inline] __do_sys_open fs/open.c:1220 [inline] __se_sys_open fs/open.c:1216 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1216 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] __key.0+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __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:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 __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+0x359/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x373/0x1440 drivers/input/input.c:404 input_inject_event+0x1bd/0x320 drivers/input/input.c:476 evdev_write+0x430/0x760 drivers/input/evdev.c:530 vfs_write+0x28e/0xa40 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae stack backtrace: CPU: 0 PID: 25427 Comm: syz-executor.3 Not tainted 5.13.0-rc2-next-20210518-syzkaller #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+0x13e/0x1d6 lib/dump_stack.c:129 print_bad_irq_dependency kernel/locking/lockdep.c:2462 [inline] check_irq_usage.cold+0x4d6/0x6c5 kernel/locking/lockdep.c:2691 check_prev_add kernel/locking/lockdep.c:2942 [inline] check_prevs_add kernel/locking/lockdep.c:3061 [inline] validate_chain kernel/locking/lockdep.c:3676 [inline] __lock_acquire+0x2a2f/0x5230 kernel/locking/lockdep.c:4902 lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __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:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x132/0x460 fs/fcntl.c:1026 __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+0x359/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x373/0x1440 drivers/input/input.c:404 input_inject_event+0x1bd/0x320 drivers/input/input.c:476 evdev_write+0x430/0x760 drivers/input/evdev.c:530 vfs_write+0x28e/0xa40 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6fbbda7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000035000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcd8d14a1f R14: 00007f6fbbda7300 R15: 0000000000022000