=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
6.1.37-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.2/20832 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffffffff8cc0a058 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xd2/0x330 fs/fcntl.c:792
and this task is already holding:
ffff888074816db0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x2f/0x330 fs/fcntl.c:778
which would create a new lock dependency:
(&f->f_owner.lock){...-}-{2:2} -> (tasklist_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+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:350 [inline]
evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:127 [inline]
input_pass_values+0x8dc/0x1290 drivers/input/input.c:159
input_event_dispose+0x366/0x650 drivers/input/input.c:374
input_handle_event+0x97d/0xb00 drivers/input/input.c:402
input_event+0xa0/0xd0 drivers/input/input.c:431
input_sync include/linux/input.h:450 [inline]
hidinput_report_event+0x8f/0xf0 drivers/hid/hid-input.c:1681
hid_report_raw_event+0x15d1/0x17e0 drivers/hid/hid-core.c:2019
hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2080
hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
__usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1671
dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1988
call_timer_fn+0x19e/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1790
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572
acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:709
cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3ce/0x680 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
rest_init+0x28f/0x2b0 init/main.c:729
start_kernel+0x0/0x544 init/main.c:890
start_kernel+0x49b/0x544 init/main.c:1145
secondary_startup_64_no_verify+0xcf/0xdb
to a SOFTIRQ-irq-unsafe lock:
(tasklist_lock){.+.+}-{2:2}
... which became SOFTIRQ-irq-unsafe at:
...
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x2c3/0xb70 kernel/exit.c:1602
kernel_wait+0xe5/0x230 kernel/exit.c:1792
call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
other info that might help us debug this:
Chain exists of:
&client->buffer_lock --> &f->f_owner.lock --> tasklist_lock
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(tasklist_lock);
local_irq_disable();
lock(&client->buffer_lock);
lock(&f->f_owner.lock);
<Interrupt>
lock(&client->buffer_lock);
*** DEADLOCK ***
5 locks held by syz-executor.2/20832:
#0: ffff88814c112460 (sb_writers#4){.+.+}-{0:0}, at: __do_splice fs/splice.c:1139 [inline]
#0: ffff88814c112460 (sb_writers#4){.+.+}-{0:0}, at: __do_sys_splice fs/splice.c:1346 [inline]
#0: ffff88814c112460 (sb_writers#4){.+.+}-{0:0}, at: __se_sys_splice+0x340/0x420 fs/splice.c:1328
#1: ffff888077dd7c68 (&pipe->mutex/1){+.+.}-{3:3}, at: iter_file_splice_write+0x2ab/0xfa0 fs/splice.c:632
#2: ffffffff91b52208 (&fsnotify_mark_srcu){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:305
#3: ffff88801e479038 (&mark->lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline]
#3: ffff88801e479038 (&mark->lock){+.+.}-{2:2}, at: dnotify_handle_event+0x5d/0x440 fs/notify/dnotify/dnotify.c:107
#4: ffff888074816db0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x2f/0x330 fs/fcntl.c:778
the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&client->buffer_lock){..-.}-{2:2} {
IN-SOFTIRQ-W at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:350 [inline]
evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:127 [inline]
input_pass_values+0x8dc/0x1290 drivers/input/input.c:159
input_event_dispose+0x366/0x650 drivers/input/input.c:374
input_handle_event+0x97d/0xb00 drivers/input/input.c:402
input_event+0xa0/0xd0 drivers/input/input.c:431
input_sync include/linux/input.h:450 [inline]
hidinput_report_event+0x8f/0xf0 drivers/hid/hid-input.c:1681
hid_report_raw_event+0x15d1/0x17e0 drivers/hid/hid-core.c:2019
hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2080
hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
__usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1671
dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1988
call_timer_fn+0x19e/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1790
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572
acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:709
cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3ce/0x680 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
rest_init+0x28f/0x2b0 init/main.c:729
start_kernel+0x0/0x544 init/main.c:890
start_kernel+0x49b/0x544 init/main.c:1145
secondary_startup_64_no_verify+0xcf/0xdb
INITIAL USE at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:350 [inline]
evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:127 [inline]
input_pass_values+0x8dc/0x1290 drivers/input/input.c:159
input_event_dispose+0x366/0x650 drivers/input/input.c:374
input_handle_event+0x97d/0xb00 drivers/input/input.c:402
input_event+0xa0/0xd0 drivers/input/input.c:431
input_sync include/linux/input.h:450 [inline]
hidinput_report_event+0x8f/0xf0 drivers/hid/hid-input.c:1681
hid_report_raw_event+0x15d1/0x17e0 drivers/hid/hid-core.c:2019
hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2080
hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
__usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1671
dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1988
call_timer_fn+0x19e/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1790
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572
acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:709
cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3ce/0x680 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
rest_init+0x28f/0x2b0 init/main.c:729
start_kernel+0x0/0x544 init/main.c:890
start_kernel+0x49b/0x544 init/main.c:1145
secondary_startup_64_no_verify+0xcf/0xdb
}
... key at: [<ffffffff91e4eb80>] evdev_open.__key.25+0x0/0x20
-> (&new->fa_lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
fasync_remove_entry+0xfb/0x1d0 fs/fcntl.c:873
sock_fasync+0x86/0xf0 net/socket.c:1395
__fput+0x70d/0x890 fs/file_table.c:317
task_work_run+0x246/0x300 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0x6fb/0x2300 kernel/exit.c:869
do_group_exit+0x202/0x2b0 kernel/exit.c:1019
get_signal+0x16f7/0x17d0 kernel/signal.c:2858
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
INITIAL READ USE at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:996 [inline]
kill_fasync+0x16a/0x490 fs/fcntl.c:1017
sock_wake_async+0x145/0x170
sk_wake_async+0x15d/0x250 include/net/sock.h:2554
unix_release_sock+0x6f7/0xcf0 net/unix/af_unix.c:635
unix_release+0x88/0xc0 net/unix/af_unix.c:1041
__sock_release net/socket.c:652 [inline]
sock_close+0xcd/0x230 net/socket.c:1370
__fput+0x3b7/0x890 fs/file_table.c:320
task_work_run+0x246/0x300 kernel/task_work.c:179
get_signal+0x15fc/0x17d0 kernel/signal.c:2635
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
}
... key at: [<ffffffff91b4f020>] fasync_insert_entry.__key+0x0/0x20
... acquired at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:996 [inline]
kill_fasync+0x16a/0x490 fs/fcntl.c:1017
__pass_event drivers/input/evdev.c:240 [inline]
evdev_pass_values+0x586/0xad0 drivers/input/evdev.c:278
evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
input_to_handler drivers/input/input.c:127 [inline]
input_pass_values+0x8dc/0x1290 drivers/input/input.c:159
input_event_dispose+0x366/0x650 drivers/input/input.c:374
input_handle_event+0x97d/0xb00 drivers/input/input.c:402
input_inject_event+0x1fd/0x300 drivers/input/input.c:461
evdev_write+0x668/0x7c0 drivers/input/evdev.c:530
vfs_write+0x2d9/0xba0 fs/read_write.c:582
ksys_write+0x19c/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> (&f->f_owner.lock){...-}-{2:2} {
IN-SOFTIRQ-R at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
send_sigurg+0x25/0x380 fs/fcntl.c:817
sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3330
tcp_check_urg+0x202/0x740 net/ipv4/tcp_input.c:5614
tcp_urg+0x154/0x440 net/ipv4/tcp_input.c:5655
tcp_rcv_established+0xe58/0x1f00 net/ipv4/tcp_input.c:6002
tcp_v4_do_rcv+0x487/0xb00 net/ipv4/tcp_ipv4.c:1671
tcp_v4_rcv+0x29e0/0x3250 net/ipv4/tcp_ipv4.c:2092
ip_protocol_deliver_rcu+0x381/0x740 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x28c/0x4c0 net/ipv4/ip_input.c:233
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5496 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5610
process_backlog+0x347/0x700 net/core/dev.c:5938
__napi_poll+0xc7/0x470 net/core/dev.c:6505
napi_poll net/core/dev.c:6572 [inline]
net_rx_action+0x70f/0xeb0 net/core/dev.c:6683
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
mutex_spin_on_owner+0x264/0x330 kernel/locking/mutex.c:383
mutex_optimistic_spin+0x38/0x2c0 kernel/locking/mutex.c:476
__mutex_lock_common+0x206/0x2520 kernel/locking/mutex.c:607
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
ip_tunnel_init_net+0x20f/0x700 net/ipv4/ip_tunnel.c:1072
ops_init+0x356/0x600 net/core/net_namespace.c:135
setup_net+0x4b5/0xb90 net/core/net_namespace.c:332
copy_net_ns+0x395/0x5d0 net/core/net_namespace.c:478
create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
copy_namespaces+0x365/0x3b0 kernel/nsproxy.c:178
copy_process+0x1a85/0x4020 kernel/fork.c:2262
kernel_clone+0x222/0x920 kernel/fork.c:2679
__do_sys_clone3 kernel/fork.c:2978 [inline]
__se_sys_clone3+0x373/0x410 kernel/fork.c:2962
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
INITIAL USE at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
f_modown+0x38/0x340 fs/fcntl.c:91
__f_setown fs/fcntl.c:110 [inline]
f_setown+0x127/0x1d0 fs/fcntl.c:138
do_fcntl+0x128/0x1480 fs/fcntl.c:377
__do_sys_fcntl fs/fcntl.c:454 [inline]
__se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:439
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
INITIAL READ USE at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline]
_raw_read_lock_irq+0xd6/0x120 kernel/locking/spinlock.c:244
f_getown+0x22/0x240 fs/fcntl.c:154
do_fcntl+0x55b/0x1480 fs/fcntl.c:373
__do_sys_fcntl fs/fcntl.c:454 [inline]
__se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:439
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
}
... key at: [<ffffffff91b4e3a0>] __alloc_file.__key+0x0/0x10
... acquired at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
send_sigio+0x2f/0x330 fs/fcntl.c:778
kill_fasync_rcu fs/fcntl.c:1003 [inline]
kill_fasync+0x20c/0x490 fs/fcntl.c:1017
sock_wake_async+0x145/0x170
sk_wake_async+0x15d/0x250 include/net/sock.h:2554
unix_release_sock+0x6f7/0xcf0 net/unix/af_unix.c:635
unix_release+0x88/0xc0 net/unix/af_unix.c:1041
__sock_release net/socket.c:652 [inline]
sock_close+0xcd/0x230 net/socket.c:1370
__fput+0x3b7/0x890 fs/file_table.c:320
task_work_run+0x246/0x300 kernel/task_work.c:179
get_signal+0x15fc/0x17d0 kernel/signal.c:2635
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
the dependencies between the lock to be acquired
and SOFTIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
HARDIRQ-ON-R at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x2c3/0xb70 kernel/exit.c:1602
kernel_wait+0xe5/0x230 kernel/exit.c:1792
call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
SOFTIRQ-ON-R at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x2c3/0xb70 kernel/exit.c:1602
kernel_wait+0xe5/0x230 kernel/exit.c:1792
call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INITIAL USE at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
copy_process+0x2483/0x4020 kernel/fork.c:2393
kernel_clone+0x222/0x920 kernel/fork.c:2679
user_mode_thread+0x12e/0x190 kernel/fork.c:2755
rest_init+0x21/0x2b0 init/main.c:694
start_kernel+0x0/0x544 init/main.c:890
start_kernel+0x49b/0x544 init/main.c:1145
secondary_startup_64_no_verify+0xcf/0xdb
INITIAL READ USE at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x2c3/0xb70 kernel/exit.c:1602
kernel_wait+0xe5/0x230 kernel/exit.c:1792
call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
}
... key at: [<ffffffff8cc0a058>] tasklist_lock+0x18/0x40
... acquired at:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
send_sigio+0xd2/0x330 fs/fcntl.c:792
dnotify_handle_event+0x138/0x440 fs/notify/dnotify/dnotify.c:115
fsnotify_handle_inode_event fs/notify/fsnotify.c:264 [inline]
fsnotify_handle_event fs/notify/fsnotify.c:293 [inline]
send_to_group fs/notify/fsnotify.c:364 [inline]
fsnotify+0x1a24/0x2450 fs/notify/fsnotify.c:570
__fsnotify_parent+0x5dd/0x730 fs/notify/fsnotify.c:230
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:99 [inline]
fsnotify_modify include/linux/fsnotify.h:317 [inline]
do_iter_write+0x9ca/0xc50 fs/read_write.c:865
iter_file_splice_write+0x806/0xfa0 fs/splice.c:686
do_splice_from fs/splice.c:764 [inline]
do_splice+0xfdb/0x1790 fs/splice.c:1074
__do_splice fs/splice.c:1139 [inline]
__do_sys_splice fs/splice.c:1346 [inline]
__se_sys_splice+0x340/0x420 fs/splice.c:1328
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
stack backtrace:
CPU: 0 PID: 20832 Comm: syz-executor.2 Not tainted 6.1.37-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_bad_irq_dependency kernel/locking/lockdep.c:2612 [inline]
check_irq_usage kernel/locking/lockdep.c:2851 [inline]
check_prev_add kernel/locking/lockdep.c:3102 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain+0x4d2e/0x58e0 kernel/locking/lockdep.c:3832
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
send_sigio+0xd2/0x330 fs/fcntl.c:792
dnotify_handle_event+0x138/0x440 fs/notify/dnotify/dnotify.c:115
fsnotify_handle_inode_event fs/notify/fsnotify.c:264 [inline]
fsnotify_handle_event fs/notify/fsnotify.c:293 [inline]
send_to_group fs/notify/fsnotify.c:364 [inline]
fsnotify+0x1a24/0x2450 fs/notify/fsnotify.c:570
__fsnotify_parent+0x5dd/0x730 fs/notify/fsnotify.c:230
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:99 [inline]
fsnotify_modify include/linux/fsnotify.h:317 [inline]
do_iter_write+0x9ca/0xc50 fs/read_write.c:865
iter_file_splice_write+0x806/0xfa0 fs/splice.c:686
do_splice_from fs/splice.c:764 [inline]
do_splice+0xfdb/0x1790 fs/splice.c:1074
__do_splice fs/splice.c:1139 [inline]
__do_sys_splice fs/splice.c:1346 [inline]
__se_sys_splice+0x340/0x420 fs/splice.c:1328
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6317e8c389
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6318c07168 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007f6317fabf80 RCX: 00007f6317e8c389
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f6317ed7493 R08: 000000007ffffffb R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc2df274f R14: 00007f6318c07300 R15: 0000000000022000
</TASK>