=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
syzkaller #0 Not tainted
-----------------------------------------------------
syz.6.13460/12545 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88807a6f7de0 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1008 [inline]
ffff88807a6f7de0 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x16d/0x490 fs/fcntl.c:1029
and this task is already holding:
ffff888063770028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:364 [inline]
ffff888063770028 (&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 SOFTIRQ-irq-safe lock:
(&client->buffer_lock){..-.}-{2:2}
... which became SOFTIRQ-irq-safe at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__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:364 [inline]
evdev_pass_values+0xcb/0xab0 drivers/input/evdev.c:261
evdev_events+0x1c0/0x2f0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:126 [inline]
input_pass_values+0x87e/0x1210 drivers/input/input.c:156
input_handle_event+0xbe0/0x1490 drivers/input/input.c:426
input_event+0x88/0xb0 drivers/input/input.c:457
hidinput_hid_event+0x1184/0x19a0 drivers/hid/hid-input.c:1483
hid_process_event+0x4b7/0x620 drivers/hid/hid-core.c:1545
hid_input_field drivers/hid/hid-core.c:1589 [inline]
hid_report_raw_event+0xdde/0x1640 drivers/hid/hid-core.c:1822
hid_input_report+0x424/0x4e0 drivers/hid/hid-core.c:1889
hid_irq_in+0x435/0x690 drivers/hid/usbhid/hid-core.c:284
__usb_hcd_giveback_urb+0x35f/0x520 drivers/usb/core/hcd.c:1674
dummy_timer+0x880/0x30b0 drivers/usb/gadget/udc/dummy_hcd.c:1998
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
lock_release+0x5a4/0x8a0 kernel/locking/lockdep.c:5647
rcu_read_unlock include/linux/rcupdate.h:773 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
batadv_nc_worker+0x25b/0x5c0 net/batman-adv/network-coding.c:723
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
to a SOFTIRQ-irq-unsafe lock:
(tasklist_lock){.+.+}-{2:2}
... which became SOFTIRQ-irq-unsafe at:
...
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x293/0xac0 kernel/exit.c:1579
kernel_wait+0xd3/0x1c0 kernel/exit.c:1769
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
other info that might help us debug this:
Chain exists of:
&client->buffer_lock --> &new->fa_lock --> tasklist_lock
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(tasklist_lock);
local_irq_disable();
lock(&client->buffer_lock);
lock(&new->fa_lock);
<Interrupt>
lock(&client->buffer_lock);
*** DEADLOCK ***
7 locks held by syz.6.13460/12545:
#0: ffff888025c1e110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x17c/0x490 drivers/input/evdev.c:513
#1: ffff888146afe230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_inject_event+0x9e/0x2c0 drivers/input/input.c:482
#2: ffffffff8c31eb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#3: ffffffff8c31eb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#4: ffffffff8c31eb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#5: ffff888063770028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:364 [inline]
#5: ffff888063770028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values+0xcb/0xab0 drivers/input/evdev.c:261
#6: ffffffff8c31eb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&client->buffer_lock){..-.}-{2:2} {
IN-SOFTIRQ-W at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__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:364 [inline]
evdev_pass_values+0xcb/0xab0 drivers/input/evdev.c:261
evdev_events+0x1c0/0x2f0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:126 [inline]
input_pass_values+0x87e/0x1210 drivers/input/input.c:156
input_handle_event+0xbe0/0x1490 drivers/input/input.c:426
input_event+0x88/0xb0 drivers/input/input.c:457
hidinput_hid_event+0x1184/0x19a0 drivers/hid/hid-input.c:1483
hid_process_event+0x4b7/0x620 drivers/hid/hid-core.c:1545
hid_input_field drivers/hid/hid-core.c:1589 [inline]
hid_report_raw_event+0xdde/0x1640 drivers/hid/hid-core.c:1822
hid_input_report+0x424/0x4e0 drivers/hid/hid-core.c:1889
hid_irq_in+0x435/0x690 drivers/hid/usbhid/hid-core.c:284
__usb_hcd_giveback_urb+0x35f/0x520 drivers/usb/core/hcd.c:1674
dummy_timer+0x880/0x30b0 drivers/usb/gadget/udc/dummy_hcd.c:1998
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
lock_release+0x5a4/0x8a0 kernel/locking/lockdep.c:5647
rcu_read_unlock include/linux/rcupdate.h:773 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
batadv_nc_worker+0x25b/0x5c0 net/batman-adv/network-coding.c:723
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
INITIAL USE at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__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:364 [inline]
evdev_pass_values+0xcb/0xab0 drivers/input/evdev.c:261
evdev_events+0x1c0/0x2f0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:126 [inline]
input_pass_values+0x87e/0x1210 drivers/input/input.c:156
input_handle_event+0xb3f/0x1490 drivers/input/input.c:415
input_inject_event+0x1b9/0x2c0 drivers/input/input.c:487
evdev_write+0x35b/0x490 drivers/input/evdev.c:530
vfs_write+0x30b/0xd60 fs/read_write.c:592
ksys_write+0x152/0x260 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
}
... key at: [<ffffffff9663f380>] evdev_open.__key.22+0x0/0x20
the dependencies between the lock to be acquired
and SOFTIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
HARDIRQ-ON-R at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x293/0xac0 kernel/exit.c:1579
kernel_wait+0xd3/0x1c0 kernel/exit.c:1769
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
SOFTIRQ-ON-R at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x293/0xac0 kernel/exit.c:1579
kernel_wait+0xd3/0x1c0 kernel/exit.c:1769
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
INITIAL USE at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
_raw_write_lock_irq+0xab/0xf0 kernel/locking/spinlock.c:316
copy_process+0x236f/0x3e20 kernel/fork.c:2412
kernel_clone+0x23f/0x990 kernel/fork.c:2679
kernel_thread+0xfa/0x160 kernel/fork.c:2731
rest_init+0x21/0x330 init/main.c:720
start_kernel+0x489/0x540 init/main.c:1154
secondary_startup_64_no_verify+0xb1/0xbb
INITIAL READ USE at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x293/0xac0 kernel/exit.c:1579
kernel_wait+0xd3/0x1c0 kernel/exit.c:1769
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
}
... key at: [<ffffffff8c00a058>] tasklist_lock+0x18/0x40
... acquired at:
__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:804
kill_fasync_rcu fs/fcntl.c:1015 [inline]
kill_fasync+0x20a/0x490 fs/fcntl.c:1029
lease_break_callback+0x22/0x30 fs/locks.c:613
__break_lease+0x4a1/0x12b0 fs/locks.c:1615
vfs_truncate+0x1fb/0x2f0 fs/open.c:105
do_sys_truncate+0xf2/0x1c0 fs/open.c:134
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> (&f->f_owner.lock){...-}-{2:2} {
IN-SOFTIRQ-R at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0xb8/0x100 kernel/locking/spinlock.c:236
send_sigurg+0x25/0x390 fs/fcntl.c:829
sk_send_sigurg+0x6b/0xc0 net/core/sock.c:3137
tcp_check_urg net/ipv4/tcp_input.c:5688 [inline]
tcp_urg+0x2bc/0xb20 net/ipv4/tcp_input.c:5729
tcp_rcv_established+0xac2/0x1ce0 net/ipv4/tcp_input.c:6063
tcp_v4_do_rcv+0x44b/0x9b0 net/ipv4/tcp_ipv4.c:1731
tcp_v4_rcv+0x26d8/0x2d10 net/ipv4/tcp_ipv4.c:2143
ip_protocol_deliver_rcu+0x3ad/0x770 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x1d5/0x320 net/ipv4/ip_input.c:231
NF_HOOK+0x303/0x390 include/linux/netfilter.h:302
NF_HOOK+0x303/0x390 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5551 [inline]
__netif_receive_skb+0xcc/0x290 net/core/dev.c:5665
process_backlog+0x370/0x790 net/core/dev.c:6542
__napi_poll+0xc0/0x430 net/core/dev.c:7101
napi_poll net/core/dev.c:7168 [inline]
net_rx_action+0x4d4/0xa10 net/core/dev.c:7258
handle_softirqs+0x339/0x830 kernel/softirq.c:576
do_softirq+0x142/0x210 kernel/softirq.c:477
__local_bh_enable_ip+0x180/0x1c0 kernel/softirq.c:401
sk_stream_wait_memory+0x6e5/0xe60 net/core/stream.c:145
tcp_sendmsg_locked+0x1d02/0x3320 net/ipv4/tcp.c:1422
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1460
sock_sendmsg_nosec net/socket.c:706 [inline]
__sock_sendmsg net/socket.c:718 [inline]
__sys_sendto+0x46d/0x620 net/socket.c:2072
__do_sys_sendto net/socket.c:2084 [inline]
__se_sys_sendto net/socket.c:2080 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2080
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
INITIAL USE at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
_raw_write_lock_irq+0xab/0xf0 kernel/locking/spinlock.c:316
__f_setown+0x37/0x330 fs/fcntl.c:91
generic_add_lease fs/locks.c:1900 [inline]
generic_setlease+0xec1/0x12f0 fs/locks.c:1980
vfs_setlease fs/locks.c:2070 [inline]
do_fcntl_add_lease fs/locks.c:2091 [inline]
fcntl_setlease+0x262/0x330 fs/locks.c:2113
do_fcntl+0x11a/0x1360 fs/fcntl.c:413
__do_sys_fcntl fs/fcntl.c:466 [inline]
__se_sys_fcntl+0xcc/0x190 fs/fcntl.c:451
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
INITIAL READ USE at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0xb8/0x100 kernel/locking/spinlock.c:236
send_sigurg+0x25/0x390 fs/fcntl.c:829
sk_send_sigurg+0x6b/0xc0 net/core/sock.c:3137
tcp_check_urg net/ipv4/tcp_input.c:5688 [inline]
tcp_urg+0x2bc/0xb20 net/ipv4/tcp_input.c:5729
tcp_rcv_established+0xac2/0x1ce0 net/ipv4/tcp_input.c:6063
tcp_v4_do_rcv+0x44b/0x9b0 net/ipv4/tcp_ipv4.c:1731
sk_backlog_rcv include/net/sock.h:1080 [inline]
__release_sock+0x1e1/0x450 net/core/sock.c:2731
release_sock+0x5b/0x1b0 net/core/sock.c:3274
sk_stream_wait_memory+0x6e5/0xe60 net/core/stream.c:145
tcp_sendmsg_locked+0x1d02/0x3320 net/ipv4/tcp.c:1422
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1460
sock_sendmsg_nosec net/socket.c:706 [inline]
__sock_sendmsg net/socket.c:718 [inline]
__sys_sendto+0x46d/0x620 net/socket.c:2072
__do_sys_sendto net/socket.c:2084 [inline]
__se_sys_sendto net/socket.c:2080 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2080
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
}
... key at: [<ffffffff96342b00>] __alloc_file.__key+0x0/0x10
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0xb8/0x100 kernel/locking/spinlock.c:236
send_sigio+0x2f/0x330 fs/fcntl.c:790
kill_fasync_rcu fs/fcntl.c:1015 [inline]
kill_fasync+0x20a/0x490 fs/fcntl.c:1029
wakeup_pipe_readers fs/splice.c:168 [inline]
splice_file_to_pipe+0x24e/0x330 fs/splice.c:1050
do_sendfile+0x592/0xeb0 fs/read_write.c:1256
__do_sys_sendfile64 fs/read_write.c:1317 [inline]
__se_sys_sendfile64+0x141/0x1a0 fs/read_write.c:1303
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> (&new->fa_lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
_raw_write_lock_irq+0xab/0xf0 kernel/locking/spinlock.c:316
fasync_remove_entry+0xf0/0x1c0 fs/fcntl.c:885
lease_modify+0x1a2/0x390 fs/locks.c:1480
locks_remove_lease fs/locks.c:2720 [inline]
locks_remove_file+0x52f/0xec0 fs/locks.c:2745
__fput+0x18d/0x930 fs/file_table.c:303
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
INITIAL READ USE at:
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0xb8/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1008 [inline]
kill_fasync+0x16d/0x490 fs/fcntl.c:1029
wakeup_pipe_readers fs/splice.c:168 [inline]
splice_file_to_pipe+0x24e/0x330 fs/splice.c:1050
do_sendfile+0x592/0xeb0 fs/read_write.c:1256
__do_sys_sendfile64 fs/read_write.c:1317 [inline]
__se_sys_sendfile64+0x141/0x1a0 fs/read_write.c:1303
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
}
... key at: [<ffffffff96343780>] fasync_insert_entry.__key+0x0/0x20
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0xb8/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1008 [inline]
kill_fasync+0x16d/0x490 fs/fcntl.c:1029
__pass_event drivers/input/evdev.c:240 [inline]
evdev_pass_values+0x54b/0xab0 drivers/input/evdev.c:278
evdev_events+0x1c0/0x2f0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:126 [inline]
input_pass_values+0x87e/0x1210 drivers/input/input.c:156
input_handle_event+0xb3f/0x1490 drivers/input/input.c:415
input_inject_event+0x1b9/0x2c0 drivers/input/input.c:487
evdev_write+0x35b/0x490 drivers/input/evdev.c:530
vfs_write+0x30b/0xd60 fs/read_write.c:592
ksys_write+0x152/0x260 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
stack backtrace:
CPU: 1 PID: 12545 Comm: syz.6.13460 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
<TASK>
dump_stack_lvl+0x188/0x250 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 kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x6688/0x7d10 kernel/locking/lockdep.c:5012
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0xb8/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1008 [inline]
kill_fasync+0x16d/0x490 fs/fcntl.c:1029
__pass_event drivers/input/evdev.c:240 [inline]
evdev_pass_values+0x54b/0xab0 drivers/input/evdev.c:278
evdev_events+0x1c0/0x2f0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:126 [inline]
input_pass_values+0x87e/0x1210 drivers/input/input.c:156
input_handle_event+0xb3f/0x1490 drivers/input/input.c:415
input_inject_event+0x1b9/0x2c0 drivers/input/input.c:487
evdev_write+0x35b/0x490 drivers/input/evdev.c:530
vfs_write+0x30b/0xd60 fs/read_write.c:592
ksys_write+0x152/0x260 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb492731dd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb49098b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb4929aafa0 RCX: 00007fb492731dd9
RDX: 0000000000001068 RSI: 0000200000000040 RDI: 0000000000000005
RBP: 00007fb4927c7d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb4929ab038 R14: 00007fb4929aafa0 R15: 00007ffc124e3408
</TASK>