=====================================================
WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
6.6.95-syzkaller #0 Not tainted
-----------------------------------------------------
syz.6.878/9226 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff8880318c0558 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:990 [inline]
ffff8880318c0558 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x192/0x4b0 fs/fcntl.c:1011
and this task is already holding:
ffff888059bcf028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff888059bcf028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values+0xcb/0xab0 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:
(&dev->event_lock#2){-...}-{2:2}
... which became HARDIRQ-irq-safe at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162
input_event+0x7a/0xc0 drivers/input/input.c:434
input_report_key include/linux/input.h:425 [inline]
psmouse_report_standard_buttons drivers/input/mouse/psmouse-base.c:128 [inline]
psmouse_report_standard_packet+0x53/0x200 drivers/input/mouse/psmouse-base.c:146
psmouse_process_byte+0x478/0x670 drivers/input/mouse/psmouse-base.c:237
psmouse_handle_byte+0x43/0x490 drivers/input/mouse/psmouse-base.c:279
ps2_interrupt+0x164/0x980 drivers/input/serio/libps2.c:613
serio_interrupt+0x8b/0x130 drivers/input/serio/serio.c:998
i8042_interrupt+0x394/0x730 drivers/input/serio/i8042.c:610
__handle_irq_event_percpu+0x276/0x930 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x247/0xb30 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
handle_irq arch/x86/kernel/irq.c:240 [inline]
__common_interrupt+0x13b/0x230 arch/x86/kernel/irq.c:259
common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:249
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0xa9/0x110 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
i8042_command drivers/input/serio/i8042.c:360 [inline]
i8042_aux_write+0x109/0x170 drivers/input/serio/i8042.c:395
serio_write include/linux/serio.h:126 [inline]
ps2_do_sendbyte+0x1ff/0x6d0 drivers/input/serio/libps2.c:58
ps2_sendbyte+0x5f/0x120 drivers/input/serio/libps2.c:113
cypress_ps2_sendbyte drivers/input/mouse/cypress_ps2.c:42 [inline]
cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline]
cypress_send_ext_cmd+0x23d/0x920 drivers/input/mouse/cypress_ps2.c:189
cypress_detect+0x8d/0x190 drivers/input/mouse/cypress_ps2.c:205
psmouse_do_detect drivers/input/mouse/psmouse-base.c:1006 [inline]
psmouse_try_protocol drivers/input/mouse/psmouse-base.c:1020 [inline]
psmouse_extensions+0x467/0xbe0 drivers/input/mouse/psmouse-base.c:1143
psmouse_switch_protocol+0xdc/0x610 drivers/input/mouse/psmouse-base.c:1537
psmouse_connect+0x89f/0x1470 drivers/input/mouse/psmouse-base.c:1626
serio_connect_driver drivers/input/serio/serio.c:44 [inline]
serio_driver_probe+0x7a/0xa0 drivers/input/serio/serio.c:775
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x25b/0xb40 drivers/base/dd.c:658
__driver_probe_device+0x18c/0x330 drivers/base/dd.c:800
driver_probe_device+0x4f/0x420 drivers/base/dd.c:830
__driver_attach+0x44e/0x6f0 drivers/base/dd.c:1216
bus_for_each_dev+0x22d/0x2a0 drivers/base/bus.c:370
serio_attach_driver drivers/input/serio/serio.c:804 [inline]
serio_handle_event+0x1a2/0x860 drivers/input/serio/serio.c:224
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
to a HARDIRQ-irq-unsafe lock:
(tasklist_lock){.+.+}-{2:2}
... which became HARDIRQ-irq-unsafe at:
...
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
do_wait+0x294/0xaf0 kernel/exit.c:1607
kernel_wait+0xac/0x170 kernel/exit.c:1797
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xb9/0x220 kernel/umh.c:164
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
other info that might help us debug this:
Chain exists of:
&dev->event_lock#2 --> &client->buffer_lock --> tasklist_lock
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(tasklist_lock);
local_irq_disable();
lock(&dev->event_lock#2);
lock(&client->buffer_lock);
<Interrupt>
lock(&dev->event_lock#2);
*** DEADLOCK ***
7 locks held by syz.6.878/9226:
#0: ffff8880263c0110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x17b/0x470 drivers/input/evdev.c:513
#1: ffff888026222230 (&dev->event_lock#2){-...}-{2:2}, at: input_inject_event+0xab/0x320 drivers/input/input.c:460
#2: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#2: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#2: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0xbc/0x320 drivers/input/input.c:462
#3: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#3: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#3: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: input_pass_values+0xa3/0x1300 drivers/input/input.c:153
#4: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#4: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#4: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x79/0x330 drivers/input/evdev.c:298
#5: ffff888059bcf028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#5: ffff888059bcf028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values+0xcb/0xab0 drivers/input/evdev.c:261
#6: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#6: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#6: ffffffff8cd2f760 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x53/0x4b0 fs/fcntl.c:1010
the dependencies between HARDIRQ-irq-safe lock and the holding lock:
-> (&dev->event_lock#2){-...}-{2:2} {
IN-HARDIRQ-W at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162
input_event+0x7a/0xc0 drivers/input/input.c:434
input_report_key include/linux/input.h:425 [inline]
psmouse_report_standard_buttons drivers/input/mouse/psmouse-base.c:128 [inline]
psmouse_report_standard_packet+0x53/0x200 drivers/input/mouse/psmouse-base.c:146
psmouse_process_byte+0x478/0x670 drivers/input/mouse/psmouse-base.c:237
psmouse_handle_byte+0x43/0x490 drivers/input/mouse/psmouse-base.c:279
ps2_interrupt+0x164/0x980 drivers/input/serio/libps2.c:613
serio_interrupt+0x8b/0x130 drivers/input/serio/serio.c:998
i8042_interrupt+0x394/0x730 drivers/input/serio/i8042.c:610
__handle_irq_event_percpu+0x276/0x930 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x247/0xb30 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
handle_irq arch/x86/kernel/irq.c:240 [inline]
__common_interrupt+0x13b/0x230 arch/x86/kernel/irq.c:259
common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:249
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0xa9/0x110 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
i8042_command drivers/input/serio/i8042.c:360 [inline]
i8042_aux_write+0x109/0x170 drivers/input/serio/i8042.c:395
serio_write include/linux/serio.h:126 [inline]
ps2_do_sendbyte+0x1ff/0x6d0 drivers/input/serio/libps2.c:58
ps2_sendbyte+0x5f/0x120 drivers/input/serio/libps2.c:113
cypress_ps2_sendbyte drivers/input/mouse/cypress_ps2.c:42 [inline]
cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline]
cypress_send_ext_cmd+0x23d/0x920 drivers/input/mouse/cypress_ps2.c:189
cypress_detect+0x8d/0x190 drivers/input/mouse/cypress_ps2.c:205
psmouse_do_detect drivers/input/mouse/psmouse-base.c:1006 [inline]
psmouse_try_protocol drivers/input/mouse/psmouse-base.c:1020 [inline]
psmouse_extensions+0x467/0xbe0 drivers/input/mouse/psmouse-base.c:1143
psmouse_switch_protocol+0xdc/0x610 drivers/input/mouse/psmouse-base.c:1537
psmouse_connect+0x89f/0x1470 drivers/input/mouse/psmouse-base.c:1626
serio_connect_driver drivers/input/serio/serio.c:44 [inline]
serio_driver_probe+0x7a/0xa0 drivers/input/serio/serio.c:775
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x25b/0xb40 drivers/base/dd.c:658
__driver_probe_device+0x18c/0x330 drivers/base/dd.c:800
driver_probe_device+0x4f/0x420 drivers/base/dd.c:830
__driver_attach+0x44e/0x6f0 drivers/base/dd.c:1216
bus_for_each_dev+0x22d/0x2a0 drivers/base/bus.c:370
serio_attach_driver drivers/input/serio/serio.c:804 [inline]
serio_handle_event+0x1a2/0x860 drivers/input/serio/serio.c:224
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INITIAL USE at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162
input_inject_event+0xab/0x320 drivers/input/input.c:460
led_trigger_event+0x133/0x210 drivers/leds/led-triggers.c:393
kbd_led_trigger_activate+0xbd/0x100 drivers/tty/vt/keyboard.c:1036
led_trigger_set+0x524/0x940 drivers/leds/led-triggers.c:212
led_trigger_set_default+0x1a0/0x1e0 drivers/leds/led-triggers.c:276
led_classdev_register_ext+0x6e9/0x940 drivers/leds/led-class.c:562
led_classdev_register include/linux/leds.h:279 [inline]
input_leds_connect+0x4eb/0x6b0 drivers/input/input-leds.c:139
input_attach_handler drivers/input/input.c:1064 [inline]
input_register_device+0xcdc/0x1070 drivers/input/input.c:2470
atkbd_connect+0x6fb/0x9a0 drivers/input/keyboard/atkbd.c:1341
serio_connect_driver drivers/input/serio/serio.c:44 [inline]
serio_driver_probe+0x7a/0xa0 drivers/input/serio/serio.c:775
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x25b/0xb40 drivers/base/dd.c:658
__driver_probe_device+0x18c/0x330 drivers/base/dd.c:800
driver_probe_device+0x4f/0x420 drivers/base/dd.c:830
__driver_attach+0x44e/0x6f0 drivers/base/dd.c:1216
bus_for_each_dev+0x22d/0x2a0 drivers/base/bus.c:370
serio_attach_driver drivers/input/serio/serio.c:804 [inline]
serio_handle_event+0x1a2/0x860 drivers/input/serio/serio.c:224
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
}
... key at: [<ffffffff971f0960>] input_allocate_device.__key.5+0x0/0x20
-> (&client->buffer_lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
evdev_pass_values+0xcb/0xab0 drivers/input/evdev.c:261
evdev_events+0x1d8/0x330 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:129 [inline]
input_pass_values+0x907/0x1300 drivers/input/input.c:161
input_event_dispose+0x346/0x6c0 drivers/input/input.c:378
input_inject_event+0x1f9/0x320 drivers/input/input.c:465
evdev_write+0x32a/0x470 drivers/input/evdev.c:530
vfs_write+0x288/0x940 fs/read_write.c:582
ksys_write+0x147/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
}
... key at: [<ffffffff971f0c00>] evdev_open.__key.28+0x0/0x20
... acquired at:
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
evdev_pass_values+0xcb/0xab0 drivers/input/evdev.c:261
evdev_events+0x1d8/0x330 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:129 [inline]
input_pass_values+0x907/0x1300 drivers/input/input.c:161
input_event_dispose+0x346/0x6c0 drivers/input/input.c:378
input_inject_event+0x1f9/0x320 drivers/input/input.c:465
evdev_write+0x32a/0x470 drivers/input/evdev.c:530
vfs_write+0x288/0x940 fs/read_write.c:582
ksys_write+0x147/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
the dependencies between the lock to be acquired
and HARDIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
HARDIRQ-ON-R at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
do_wait+0x294/0xaf0 kernel/exit.c:1607
kernel_wait+0xac/0x170 kernel/exit.c:1797
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xb9/0x220 kernel/umh.c:164
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
SOFTIRQ-ON-R at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
do_wait+0x294/0xaf0 kernel/exit.c:1607
kernel_wait+0xac/0x170 kernel/exit.c:1797
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xb9/0x220 kernel/umh.c:164
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INITIAL USE at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xa3/0xe0 kernel/locking/spinlock.c:326
copy_process+0x225d/0x3d70 kernel/fork.c:2631
kernel_clone+0x21b/0x840 kernel/fork.c:2914
user_mode_thread+0xde/0x130 kernel/fork.c:2992
rest_init+0x27/0x300 init/main.c:697
arch_call_rest_init+0xe/0x10 init/main.c:829
start_kernel+0x459/0x4e0 init/main.c:1074
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
copy_bootdata+0x0/0xe0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x179/0x17b
INITIAL READ USE at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
do_wait+0x294/0xaf0 kernel/exit.c:1607
kernel_wait+0xac/0x170 kernel/exit.c:1797
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xb9/0x220 kernel/umh.c:164
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
}
... key at: [<ffffffff8ca0a058>] tasklist_lock+0x18/0x40
... acquired at:
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
send_sigio+0xf9/0x360 fs/fcntl.c:786
kill_fasync_rcu fs/fcntl.c:997 [inline]
kill_fasync+0x228/0x4b0 fs/fcntl.c:1011
sock_wake_async+0x137/0x160 net/socket.c:-1
sk_wake_async+0x184/0x280 include/net/sock.h:2565
unix_release_sock+0x6b2/0xc80 net/unix/af_unix.c:637
unix_release+0x8c/0xc0 net/unix/af_unix.c:1048
__sock_release net/socket.c:659 [inline]
sock_close+0xbd/0x230 net/socket.c:1421
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
get_signal+0x1235/0x1400 kernel/signal.c:2678
arch_do_signal_or_restart+0x96/0x780 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> (&f->f_owner.lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xa3/0xe0 kernel/locking/spinlock.c:326
__f_setown+0x3b/0x330 fs/fcntl.c:92
__tty_fasync drivers/tty/tty_io.c:2238 [inline]
tty_fasync+0x258/0x340 drivers/tty/tty_io.c:2253
setfl fs/fcntl.c:74 [inline]
do_fcntl+0xd4f/0x1380 fs/fcntl.c:334
__do_sys_fcntl fs/fcntl.c:448 [inline]
__se_sys_fcntl+0xc9/0x1a0 fs/fcntl.c:433
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
INITIAL READ USE at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:236
send_sigurg+0x29/0x3c0 fs/fcntl.c:811
sk_send_sigurg+0x6f/0xc0 net/core/sock.c:3387
queue_oob+0x4b5/0x5d0 net/unix/af_unix.c:2159
unix_stream_sendmsg+0xaa2/0xba0 net/unix/af_unix.c:2278
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x5bf/0x950 net/socket.c:2595
___sys_sendmsg+0x220/0x290 net/socket.c:2649
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2687 [inline]
__se_sys_sendmsg+0x1a5/0x270 net/socket.c:2685
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
}
... key at: [<ffffffff96ef7200>] init_file.__key+0x0/0x20
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:236
send_sigio+0x33/0x360 fs/fcntl.c:772
kill_fasync_rcu fs/fcntl.c:997 [inline]
kill_fasync+0x228/0x4b0 fs/fcntl.c:1011
sock_wake_async+0x137/0x160 net/socket.c:-1
sk_wake_async+0x184/0x280 include/net/sock.h:2565
unix_release_sock+0x6b2/0xc80 net/unix/af_unix.c:637
unix_release+0x8c/0xc0 net/unix/af_unix.c:1048
__sock_release net/socket.c:659 [inline]
sock_close+0xbd/0x230 net/socket.c:1421
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
get_signal+0x1235/0x1400 kernel/signal.c:2678
arch_do_signal_or_restart+0x96/0x780 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> (&new->fa_lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xa3/0xe0 kernel/locking/spinlock.c:326
fasync_remove_entry+0xf4/0x1c0 fs/fcntl.c:867
__tty_fasync drivers/tty/tty_io.c:2220 [inline]
tty_fasync+0xfb/0x340 drivers/tty/tty_io.c:2253
__fput+0x7f3/0x970 fs/file_table.c:381
task_work_run+0x1ce/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
INITIAL READ USE at:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:990 [inline]
kill_fasync+0x192/0x4b0 fs/fcntl.c:1011
sock_wake_async+0x137/0x160 net/socket.c:-1
sk_wake_async+0x184/0x280 include/net/sock.h:2565
unix_release_sock+0x6b2/0xc80 net/unix/af_unix.c:637
unix_release+0x8c/0xc0 net/unix/af_unix.c:1048
__sock_release net/socket.c:659 [inline]
sock_close+0xbd/0x230 net/socket.c:1421
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
get_signal+0x1235/0x1400 kernel/signal.c:2678
arch_do_signal_or_restart+0x96/0x780 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
}
... key at: [<ffffffff96ef7e80>] fasync_insert_entry.__key+0x0/0x20
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:990 [inline]
kill_fasync+0x192/0x4b0 fs/fcntl.c:1011
__pass_event drivers/input/evdev.c:240 [inline]
evdev_pass_values+0x54b/0xab0 drivers/input/evdev.c:278
evdev_events+0x1d8/0x330 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:129 [inline]
input_pass_values+0x907/0x1300 drivers/input/input.c:161
input_event_dispose+0x346/0x6c0 drivers/input/input.c:378
input_inject_event+0x1f9/0x320 drivers/input/input.c:465
evdev_write+0x32a/0x470 drivers/input/evdev.c:530
vfs_write+0x288/0x940 fs/read_write.c:582
ksys_write+0x147/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
stack backtrace:
CPU: 0 PID: 9226 Comm: syz.6.878 Not tainted 6.6.95-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline]
check_irq_usage kernel/locking/lockdep.c:2865 [inline]
check_prev_add kernel/locking/lockdep.c:3138 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x678f/0x7c80 kernel/locking/lockdep.c:5137
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:990 [inline]
kill_fasync+0x192/0x4b0 fs/fcntl.c:1011
__pass_event drivers/input/evdev.c:240 [inline]
evdev_pass_values+0x54b/0xab0 drivers/input/evdev.c:278
evdev_events+0x1d8/0x330 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:129 [inline]
input_pass_values+0x907/0x1300 drivers/input/input.c:161
input_event_dispose+0x346/0x6c0 drivers/input/input.c:378
input_inject_event+0x1f9/0x320 drivers/input/input.c:465
evdev_write+0x32a/0x470 drivers/input/evdev.c:530
vfs_write+0x288/0x940 fs/read_write.c:582
ksys_write+0x147/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe7fcb8e929
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe7fd9e1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe7fcdb5fa0 RCX: 00007fe7fcb8e929
RDX: 0000000000002250 RSI: 0000200000000040 RDI: 0000000000000003
RBP: 00007fe7fcc10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe7fcdb5fa0 R15: 00007ffc3dcc9868
</TASK>