=====================================================
WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
5.19.0-rc2-syzkaller-00117-g47700948a4ab #0 Not tainted
-----------------------------------------------------
syz-executor.5/8518 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffffffff8ba0a098 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xab/0x380 fs/fcntl.c:791
and this task is already holding:
ffff88802556a8b0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x24/0x380 fs/fcntl.c:777
which would create a new lock dependency:
(&f->f_owner.lock){...-}-{2:2} -> (tasklist_lock){.+.+}-{2:2}
but this new dependency connects a HARDIRQ-irq-safe lock:
(&timer->lock){-.-.}-{2:2}
... which became HARDIRQ-irq-safe at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__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:349 [inline]
snd_hrtimer_callback+0x4f/0x3c0 sound/core/hrtimer.c:38
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
do_wait+0x150/0xce0 kernel/exit.c:1494
kernel_wait4+0x14c/0x260 kernel/exit.c:1681
__do_sys_wait4+0x13f/0x150 kernel/exit.c:1709
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
to a HARDIRQ-irq-unsafe lock:
(tasklist_lock){.+.+}-{2:2}
... which became HARDIRQ-irq-unsafe at:
...
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
do_wait+0x284/0xce0 kernel/exit.c:1508
kernel_wait+0x9c/0x150 kernel/exit.c:1698
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
other info that might help us debug this:
Chain exists of:
&timer->lock --> &f->f_owner.lock --> tasklist_lock
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(tasklist_lock);
local_irq_disable();
lock(&timer->lock);
lock(&f->f_owner.lock);
<Interrupt>
lock(&timer->lock);
*** DEADLOCK ***
5 locks held by syz-executor.5/8518:
#0: ffffffff8bd86b20 (rcu_read_lock){....}-{1:2}, at: sock_def_readable+0x0/0x4e0 net/core/sock.c:2234
#1: ffffffff8bd86b20 (rcu_read_lock){....}-{1:2}, at: rcu_read_unlock include/linux/rcupdate.h:724 [inline]
#1: ffffffff8bd86b20 (rcu_read_lock){....}-{1:2}, at: sock_def_readable+0x2aa/0x4e0 net/core/sock.c:3220
#2: ffffffff8bd86b20 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x41/0x470 fs/fcntl.c:1014
#3: ffff88804a9588a0 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:995 [inline]
#3: ffff88804a9588a0 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1016 [inline]
#3: ffff88804a9588a0 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x136/0x470 fs/fcntl.c:1009
#4: ffff88802556a8b0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x24/0x380 fs/fcntl.c:777
the dependencies between HARDIRQ-irq-safe lock and the holding lock:
-> (&timer->lock){-.-.}-{2:2} {
IN-HARDIRQ-W at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__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:349 [inline]
snd_hrtimer_callback+0x4f/0x3c0 sound/core/hrtimer.c:38
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
do_wait+0x150/0xce0 kernel/exit.c:1494
kernel_wait4+0x14c/0x260 kernel/exit.c:1681
__do_sys_wait4+0x13f/0x150 kernel/exit.c:1709
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
IN-SOFTIRQ-W at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
snd_timer_notify sound/core/timer.c:1086 [inline]
snd_timer_notify+0x10c/0x3d0 sound/core/timer.c:1073
snd_pcm_timer_notify sound/core/pcm_native.c:608 [inline]
snd_pcm_post_stop+0x195/0x1f0 sound/core/pcm_native.c:1512
snd_pcm_action_single sound/core/pcm_native.c:1283 [inline]
snd_pcm_drain_done+0xdc/0x120 sound/core/pcm_native.c:1550
snd_pcm_update_state+0x43b/0x540 sound/core/pcm_lib.c:191
snd_pcm_update_hw_ptr0+0xa75/0x1a50 sound/core/pcm_lib.c:465
snd_pcm_period_elapsed_under_stream_lock+0x15a/0x230 sound/core/pcm_lib.c:1817
snd_pcm_period_elapsed+0x28/0x50 sound/core/pcm_lib.c:1849
dummy_hrtimer_callback+0x94/0x1b0 sound/drivers/dummy.c:377
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x29b/0x9c2 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
get_current arch/x86/include/asm/current.h:15 [inline]
finish_task_switch.isra.0+0x323/0xb80 kernel/sched/core.c:4996
context_switch kernel/sched/core.c:5119 [inline]
__schedule+0xa08/0x4b30 kernel/sched/core.c:6428
schedule+0xd2/0x1f0 kernel/sched/core.c:6500
worker_thread+0x15c/0x1080 kernel/workqueue.c:2457
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
snd_timer_notify sound/core/timer.c:1086 [inline]
snd_timer_notify+0x10c/0x3d0 sound/core/timer.c:1073
snd_pcm_timer_notify sound/core/pcm_native.c:608 [inline]
snd_pcm_post_stop+0x195/0x1f0 sound/core/pcm_native.c:1512
snd_pcm_action_single+0xf4/0x130 sound/core/pcm_native.c:1283
snd_pcm_action+0x6e/0x90 sound/core/pcm_native.c:1364
snd_pcm_stop sound/core/pcm_native.c:1535 [inline]
snd_pcm_drop+0x1ab/0x320 sound/core/pcm_native.c:2218
snd_pcm_kernel_ioctl+0x2af/0x310 sound/core/pcm_native.c:3445
snd_pcm_oss_sync+0x230/0x800 sound/core/oss/pcm_oss.c:1746
snd_pcm_oss_release+0x276/0x300 sound/core/oss/pcm_oss.c:2590
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xaff/0x2a00 kernel/exit.c:795
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x2542/0x2600 kernel/signal.c:2857
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
}
... key at: [<ffffffff912c1920>] __key.10+0x0/0x40
-> (&new->fa_lock){....}-{2:2} {
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326
fasync_insert_entry+0x1d2/0x2a0 fs/fcntl.c:919
fasync_add_entry fs/fcntl.c:958 [inline]
fasync_helper+0x5f/0xb0 fs/fcntl.c:976
pipe_fasync+0xd4/0x220 fs/pipe.c:748
ioctl_fioasync fs/ioctl.c:379 [inline]
do_vfs_ioctl+0x2b0/0x15c0 fs/ioctl.c:791
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x108/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
INITIAL READ USE at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:995 [inline]
kill_fasync fs/fcntl.c:1016 [inline]
kill_fasync+0x136/0x470 fs/fcntl.c:1009
pipe_release+0x1b4/0x310 fs/pipe.c:730
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
}
... key at: [<ffffffff90fc35e0>] __key.0+0x0/0x40
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:995 [inline]
kill_fasync fs/fcntl.c:1016 [inline]
kill_fasync+0x136/0x470 fs/fcntl.c:1009
snd_timer_user_ccallback+0x298/0x330 sound/core/timer.c:1386
snd_timer_notify1+0x11c/0x3b0 sound/core/timer.c:516
snd_timer_start1+0x4d4/0x800 sound/core/timer.c:578
snd_timer_start sound/core/timer.c:696 [inline]
snd_timer_start sound/core/timer.c:689 [inline]
snd_timer_user_start.isra.0+0x1e3/0x260 sound/core/timer.c:1984
__snd_timer_user_ioctl.isra.0+0xda4/0x2490 sound/core/timer.c:2107
snd_timer_user_ioctl+0x77/0xb0 sound/core/timer.c:2128
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
-> (&f->f_owner.lock){...-}-{2:2} {
IN-SOFTIRQ-R at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
send_sigurg+0x1e/0xaf0 fs/fcntl.c:816
sk_send_sigurg+0x76/0x310 net/core/sock.c:3275
tcp_check_urg net/ipv4/tcp_input.c:5596 [inline]
tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5637
tcp_rcv_established+0x81d/0x20e0 net/ipv4/tcp_input.c:5984
tcp_v6_do_rcv+0x810/0x13c0 net/ipv6/tcp_ipv6.c:1476
tcp_v6_rcv+0x2d9b/0x37f0 net/ipv6/tcp_ipv6.c:1735
ip6_protocol_deliver_rcu+0x2f9/0x1950 net/ipv6/ip6_input.c:436
ip6_input_finish+0x14c/0x2c0 net/ipv6/ip6_input.c:481
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:490
dst_input include/net/dst.h:461 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x27f/0x3b0 net/ipv6/ip6_input.c:306
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5478
__netif_receive_skb+0x24/0x1b0 net/core/dev.c:5592
process_backlog+0x3a0/0x7c0 net/core/dev.c:5920
__napi_poll+0xb3/0x6e0 net/core/dev.c:6486
napi_poll net/core/dev.c:6553 [inline]
net_rx_action+0x9c1/0xd90 net/core/dev.c:6664
__do_softirq+0x29b/0x9c2 kernel/softirq.c:571
do_softirq.part.0+0xde/0x130 kernel/softirq.c:472
do_softirq kernel/softirq.c:464 [inline]
__local_bh_enable_ip+0x102/0x120 kernel/softirq.c:396
sk_stream_wait_memory+0x608/0xed0 net/core/stream.c:145
tcp_sendmsg_locked+0x7d5/0x2fc0 net/ipv4/tcp.c:1410
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1448
inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:652
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
__sys_sendto+0x21a/0x320 net/socket.c:2119
__do_sys_sendto net/socket.c:2131 [inline]
__se_sys_sendto net/socket.c:2127 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2127
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326
f_modown+0x2a/0x390 fs/fcntl.c:90
__f_setown fs/fcntl.c:109 [inline]
f_setown+0xd7/0x230 fs/fcntl.c:137
do_fcntl+0x6f1/0x1040 fs/fcntl.c:376
__do_sys_fcntl fs/fcntl.c:453 [inline]
__se_sys_fcntl fs/fcntl.c:438 [inline]
__x64_sys_fcntl+0x15f/0x1d0 fs/fcntl.c:438
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
INITIAL READ USE at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline]
_raw_read_lock_irq+0x63/0x80 kernel/locking/spinlock.c:244
f_getown_ex fs/fcntl.c:211 [inline]
do_fcntl+0x9c9/0x1040 fs/fcntl.c:379
__do_sys_fcntl fs/fcntl.c:453 [inline]
__se_sys_fcntl fs/fcntl.c:438 [inline]
__x64_sys_fcntl+0x15f/0x1d0 fs/fcntl.c:438
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
}
... key at: [<ffffffff90fc2800>] __key.5+0x0/0x40
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
send_sigio+0x24/0x380 fs/fcntl.c:777
kill_fasync_rcu fs/fcntl.c:1002 [inline]
kill_fasync fs/fcntl.c:1016 [inline]
kill_fasync+0x1f8/0x470 fs/fcntl.c:1009
pipe_release+0x1b4/0x310 fs/pipe.c:730
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
the dependencies between the lock to be acquired
and HARDIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
HARDIRQ-ON-R at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
do_wait+0x284/0xce0 kernel/exit.c:1508
kernel_wait+0x9c/0x150 kernel/exit.c:1698
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
SOFTIRQ-ON-R at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
do_wait+0x284/0xce0 kernel/exit.c:1508
kernel_wait+0x9c/0x150 kernel/exit.c:1698
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326
copy_process+0x445e/0x7020 kernel/fork.c:2374
kernel_clone+0xe7/0xab0 kernel/fork.c:2655
user_mode_thread+0xad/0xe0 kernel/fork.c:2724
rest_init+0x23/0x270 init/main.c:691
arch_call_rest_init+0xf/0x14 init/main.c:882
start_kernel+0x46e/0x48f init/main.c:1137
secondary_startup_64_no_verify+0xce/0xdb
INITIAL READ USE at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
do_wait+0x284/0xce0 kernel/exit.c:1508
kernel_wait+0x9c/0x150 kernel/exit.c:1698
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
}
... key at: [<ffffffff8ba0a098>] tasklist_lock+0x18/0x40
... acquired at:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
send_sigio+0xab/0x380 fs/fcntl.c:791
kill_fasync_rcu fs/fcntl.c:1002 [inline]
kill_fasync fs/fcntl.c:1016 [inline]
kill_fasync+0x1f8/0x470 fs/fcntl.c:1009
sock_wake_async+0xd2/0x160 net/socket.c:1419
sk_wake_async include/net/sock.h:2466 [inline]
sk_wake_async include/net/sock.h:2462 [inline]
sock_def_readable+0x349/0x4e0 net/core/sock.c:3219
unix_dgram_sendmsg+0xf69/0x1ad0 net/unix/af_unix.c:2028
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
____sys_sendmsg+0x334/0x810 net/socket.c:2492
___sys_sendmsg+0xf3/0x170 net/socket.c:2546
__sys_sendmmsg+0x195/0x470 net/socket.c:2632
__do_sys_sendmmsg net/socket.c:2661 [inline]
__se_sys_sendmmsg net/socket.c:2658 [inline]
__x64_sys_sendmmsg+0x99/0x100 net/socket.c:2658
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
stack backtrace:
CPU: 0 PID: 8518 Comm: syz-executor.5 Not tainted 5.19.0-rc2-syzkaller-00117-g47700948a4ab #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_bad_irq_dependency kernel/locking/lockdep.c:2609 [inline]
check_irq_usage.cold+0x4c1/0x6b0 kernel/locking/lockdep.c:2848
check_prev_add kernel/locking/lockdep.c:3099 [inline]
check_prevs_add kernel/locking/lockdep.c:3214 [inline]
validate_chain kernel/locking/lockdep.c:3829 [inline]
__lock_acquire+0x2ad6/0x5660 kernel/locking/lockdep.c:5053
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
send_sigio+0xab/0x380 fs/fcntl.c:791
kill_fasync_rcu fs/fcntl.c:1002 [inline]
kill_fasync fs/fcntl.c:1016 [inline]
kill_fasync+0x1f8/0x470 fs/fcntl.c:1009
sock_wake_async+0xd2/0x160 net/socket.c:1419
sk_wake_async include/net/sock.h:2466 [inline]
sk_wake_async include/net/sock.h:2462 [inline]
sock_def_readable+0x349/0x4e0 net/core/sock.c:3219
unix_dgram_sendmsg+0xf69/0x1ad0 net/unix/af_unix.c:2028
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
____sys_sendmsg+0x334/0x810 net/socket.c:2492
___sys_sendmsg+0xf3/0x170 net/socket.c:2546
__sys_sendmmsg+0x195/0x470 net/socket.c:2632
__do_sys_sendmmsg net/socket.c:2661 [inline]
__se_sys_sendmmsg net/socket.c:2658 [inline]
__x64_sys_sendmmsg+0x99/0x100 net/socket.c:2658
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7eff5fc89109
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007eff60d3e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007eff5fd9bf60 RCX: 00007eff5fc89109
RDX: 0307017fdb7a66cb RSI: 0000000020002dc0 RDI: 0000000000000003
RBP: 00007eff5fce305d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000003ec0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007eff602cfb1f R14: 00007eff60d3e300 R15: 0000000000022000
</TASK>