[syzbot] possible deadlock in snd_hrtimer_callback (2)

syzbot
2021-11-10T17:01:26Z

Hello,

syzbot found the following issue on:

HEAD commit: cb690f5238d7 Merge tag 'for-5.16/drivers-2021-11-09' of gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15f805c1b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d7259f0deb293aa
dashboard link: https://syzkaller.appspot.com/bug?extid=8285e973a41b5aa68902
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8285e973a41b5aa68902@syzkaller.appspotmail.com

=====================================================
WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
5.15.0-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.0/30191 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88801d373168 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1014 [inline]
ffff88801d373168 (&new->fa_lock){...-}-{2:2}, at: kill_fasync fs/fcntl.c:1035 [inline]
ffff88801d373168 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x136/0x470 fs/fcntl.c:1028

and this task is already holding:
ffff888021a2d148 (&timer->lock){-.-.}-{2:2}, at: snd_timer_start1+0x5a/0x800 sound/core/timer.c:541
which would create a new lock dependency:
(&timer->lock){-.-.}-{2:2} -> (&new->fa_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:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__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:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638

to a HARDIRQ-irq-unsafe lock:
(tasklist_lock){.+.?}-{2:2}

... which became HARDIRQ-irq-unsafe at:
...
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
do_wait+0x284/0xce0 kernel/exit.c:1511
kernel_wait+0x9c/0x150 kernel/exit.c:1701
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

other info that might help us debug this:

Chain exists of:
&timer->lock --> &new->fa_lock --> tasklist_lock

Possible interrupt unsafe locking scenario:

CPU0 CPU1
---- ----
lock(tasklist_lock);
local_irq_disable();
lock(&timer->lock);
lock(&new->fa_lock);
<Interrupt>
lock(&timer->lock);

*** DEADLOCK ***

3 locks held by syz-executor.0/30191:
#0: ffff88801ca04d68 (&tu->ioctl_lock){+.+.}-{3:3}, at: snd_timer_user_ioctl+0x4c/0xb0 sound/core/timer.c:2128
#1: ffff888021a2d148 (&timer->lock){-.-.}-{2:2}, at: snd_timer_start1+0x5a/0x800 sound/core/timer.c:541
#2: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x41/0x470 fs/fcntl.c:1033

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:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__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:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
IN-SOFTIRQ-W at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__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:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
bpf_task_storage_free+0x1ea/0x400 kernel/bpf/bpf_task_storage.c:112
security_task_free+0x3e/0xe0 security/security.c:1656
__put_task_struct+0x128/0x400 kernel/fork.c:751
put_task_struct include/linux/sched/task.h:114 [inline]
delayed_put_task_struct+0x1f6/0x340 kernel/exit.c:174
rcu_do_batch kernel/rcu/tree.c:2506 [inline]
rcu_core+0x7ab/0x1470 kernel/rcu/tree.c:2741
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
resched_offsets_ok kernel/sched/core.c:9488 [inline]
__might_resched+0x65/0x2c0 kernel/sched/core.c:9503
might_alloc include/linux/sched/mm.h:230 [inline]
slab_pre_alloc_hook mm/slab.h:492 [inline]
slab_alloc_node mm/slub.c:3148 [inline]
__kmalloc_node_track_caller+0x271/0x360 mm/slub.c:4956
kmalloc_reserve net/core/skbuff.c:354 [inline]
__alloc_skb+0xde/0x340 net/core/skbuff.c:426
alloc_skb include/linux/skbuff.h:1120 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1191 [inline]
netlink_sendmsg+0x967/0xda0 net/netlink/af_netlink.c:1891
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
____sys_sendmsg+0x331/0x810 net/socket.c:2409
___sys_sendmsg+0xf3/0x170 net/socket.c:2463
__sys_sendmmsg+0x195/0x470 net/socket.c:2549
__do_sys_sendmmsg net/socket.c:2578 [inline]
__se_sys_sendmmsg net/socket.c:2575 [inline]
__x64_sys_sendmmsg+0x99/0x100 net/socket.c:2575
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+0x44/0xae
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:170
spin_lock_irq include/linux/spinlock.h:374 [inline]
snd_pcm_detach_substream+0x16b/0x360 sound/core/pcm.c:995
snd_pcm_release_substream+0x57/0x70 sound/core/pcm_native.c:2635
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2394 [inline]
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2386 [inline]
snd_pcm_oss_release+0x171/0x300 sound/core/oss/pcm_oss.c:2573
__fput+0x286/0x9f0 fs/file_table.c:280
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:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
}
... key at: [<ffffffff90606780>] __key.12+0x0/0x40

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:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
do_wait+0x284/0xce0 kernel/exit.c:1511
kernel_wait+0x9c/0x150 kernel/exit.c:1701
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
IN-SOFTIRQ-R at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:228
send_sigurg+0xad/0xaf0 fs/fcntl.c:851
sk_send_sigurg+0x76/0x310 net/core/sock.c:3172
tcp_check_urg.isra.0+0x1f3/0x710 net/ipv4/tcp_input.c:5567
tcp_urg net/ipv4/tcp_input.c:5608 [inline]
tcp_rcv_established+0x12ab/0x2130 net/ipv4/tcp_input.c:5942
tcp_v4_do_rcv+0x600/0x8d0 net/ipv4/tcp_ipv4.c:1716
tcp_v4_rcv+0x2768/0x3080 net/ipv4/tcp_ipv4.c:2110
ip_protocol_deliver_rcu+0xa7/0xee0 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
dst_input include/net/dst.h:460 [inline]
ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5462
__netif_receive_skb+0x24/0x1b0 net/core/dev.c:5576
process_backlog+0x2a5/0x6c0 net/core/dev.c:6452
__napi_poll+0xaf/0x440 net/core/dev.c:7017
napi_poll net/core/dev.c:7084 [inline]
net_rx_action+0x801/0xb40 net/core/dev.c:7171
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:920 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
SOFTIRQ-ON-R at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
do_wait+0x284/0xce0 kernel/exit.c:1511
kernel_wait+0x9c/0x150 kernel/exit.c:1701
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_write_lock_irq include/linux/rwlock_api_smp.h:194 [inline]
_raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:316
copy_process+0x36c0/0x75a0 kernel/fork.c:2310
kernel_clone+0xe7/0xab0 kernel/fork.c:2581
kernel_thread+0xb5/0xf0 kernel/fork.c:2633
rest_init+0x23/0x3e0 init/main.c:690
start_kernel+0x47a/0x49b init/main.c:1135
secondary_startup_64_no_verify+0xb0/0xbb
INITIAL READ USE at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
do_wait+0x284/0xce0 kernel/exit.c:1511
kernel_wait+0x9c/0x150 kernel/exit.c:1701
call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
}
... key at: [<ffffffff8b60a098>] tasklist_lock+0x18/0x40
... acquired at:
__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
_raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
send_sigio+0xab/0x380 fs/fcntl.c:810
kill_fasync_rcu fs/fcntl.c:1021 [inline]
kill_fasync fs/fcntl.c:1035 [inline]
kill_fasync+0x1f8/0x470 fs/fcntl.c:1028
sock_wake_async+0xd2/0x160 net/socket.c:1368
sk_wake_async include/net/sock.h:2400 [inline]
sk_wake_async+0x108/0x290 include/net/sock.h:2396
tcp_rcv_state_process+0x32a0/0x4bd0 net/ipv4/tcp_input.c:6486
tcp_v4_do_rcv+0x323/0x8d0 net/ipv4/tcp_ipv4.c:1738
sk_backlog_rcv include/net/sock.h:1030 [inline]
__release_sock+0x134/0x3b0 net/core/sock.c:2768
release_sock+0x54/0x1b0 net/core/sock.c:3300
inet_wait_for_connect net/ipv4/af_inet.c:593 [inline]
__inet_stream_connect+0x5db/0xed0 net/ipv4/af_inet.c:685
tcp_sendmsg_fastopen net/ipv4/tcp.c:1161 [inline]
tcp_sendmsg_locked+0x2010/0x2c60 net/ipv4/tcp.c:1203
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1422
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
__sys_sendto+0x21c/0x320 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044
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+0x44/0xae

-> (&f->f_owner.lock){...-}-{2:2} {
IN-SOFTIRQ-R at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
send_sigurg+0x1e/0xaf0 fs/fcntl.c:835
sk_send_sigurg+0x76/0x310 net/core/sock.c:3172
tcp_check_urg.isra.0+0x1f3/0x710 net/ipv4/tcp_input.c:5567
tcp_urg net/ipv4/tcp_input.c:5608 [inline]
tcp_rcv_established+0x12ab/0x2130 net/ipv4/tcp_input.c:5942
tcp_v4_do_rcv+0x600/0x8d0 net/ipv4/tcp_ipv4.c:1716
tcp_v4_rcv+0x2768/0x3080 net/ipv4/tcp_ipv4.c:2110
ip_protocol_deliver_rcu+0xa7/0xee0 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
dst_input include/net/dst.h:460 [inline]
ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5462
__netif_receive_skb+0x24/0x1b0 net/core/dev.c:5576
process_backlog+0x2a5/0x6c0 net/core/dev.c:6452
__napi_poll+0xaf/0x440 net/core/dev.c:7017
napi_poll net/core/dev.c:7084 [inline]
net_rx_action+0x801/0xb40 net/core/dev.c:7171
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:920 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_write_lock_irq include/linux/rwlock_api_smp.h:194 [inline]
_raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:316
f_modown+0x2a/0x390 fs/fcntl.c:91
generic_add_lease fs/locks.c:1735 [inline]
generic_setlease+0x11bc/0x1a60 fs/locks.c:1814
vfs_setlease+0xfd/0x120 fs/locks.c:1904
do_fcntl_add_lease fs/locks.c:1925 [inline]
fcntl_setlease+0x134/0x2c0 fs/locks.c:1947
do_fcntl+0x2b6/0x1210 fs/fcntl.c:419
__do_sys_fcntl fs/fcntl.c:472 [inline]
__se_sys_fcntl fs/fcntl.c:457 [inline]
__x64_sys_fcntl+0x165/0x1e0 fs/fcntl.c:457
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+0x44/0xae
INITIAL READ USE at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
send_sigurg+0x1e/0xaf0 fs/fcntl.c:835
sk_send_sigurg+0x76/0x310 net/core/sock.c:3172
tcp_check_urg.isra.0+0x1f3/0x710 net/ipv4/tcp_input.c:5567
tcp_urg net/ipv4/tcp_input.c:5608 [inline]
tcp_rcv_established+0x12ab/0x2130 net/ipv4/tcp_input.c:5942
tcp_v4_do_rcv+0x600/0x8d0 net/ipv4/tcp_ipv4.c:1716
sk_backlog_rcv include/net/sock.h:1030 [inline]
__release_sock+0x134/0x3b0 net/core/sock.c:2768
release_sock+0x54/0x1b0 net/core/sock.c:3300
sk_stream_wait_memory+0x604/0xed0 net/core/stream.c:145
tcp_sendmsg_locked+0x7c1/0x2c60 net/ipv4/tcp.c:1384
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1422
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
__sys_sendto+0x21c/0x320 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044
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+0x44/0xae
}
... key at: [<ffffffff90307de0>] __key.5+0x0/0x40
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
send_sigio+0x24/0x380 fs/fcntl.c:796
kill_fasync_rcu fs/fcntl.c:1021 [inline]
kill_fasync fs/fcntl.c:1035 [inline]
kill_fasync+0x1f8/0x470 fs/fcntl.c:1028
sock_wake_async+0xd2/0x160 net/socket.c:1368
sk_wake_async include/net/sock.h:2400 [inline]
sk_wake_async+0x108/0x290 include/net/sock.h:2396
tcp_rcv_state_process+0x32a0/0x4bd0 net/ipv4/tcp_input.c:6486
tcp_v4_do_rcv+0x323/0x8d0 net/ipv4/tcp_ipv4.c:1738
sk_backlog_rcv include/net/sock.h:1030 [inline]
__release_sock+0x134/0x3b0 net/core/sock.c:2768
release_sock+0x54/0x1b0 net/core/sock.c:3300
inet_wait_for_connect net/ipv4/af_inet.c:593 [inline]
__inet_stream_connect+0x5db/0xed0 net/ipv4/af_inet.c:685
tcp_sendmsg_fastopen net/ipv4/tcp.c:1161 [inline]
tcp_sendmsg_locked+0x2010/0x2c60 net/ipv4/tcp.c:1203
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1422
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
__sys_sendto+0x21c/0x320 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044
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+0x44/0xae

-> (&new->fa_lock){...-}-{2:2} {
IN-SOFTIRQ-R at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1014 [inline]
kill_fasync fs/fcntl.c:1035 [inline]
kill_fasync+0x136/0x470 fs/fcntl.c:1028
sock_wake_async+0xf1/0x160 net/socket.c:1371
sk_wake_async include/net/sock.h:2400 [inline]
sk_wake_async include/net/sock.h:2396 [inline]
sk_send_sigurg net/core/sock.c:3173 [inline]
sk_send_sigurg+0x17c/0x310 net/core/sock.c:3169
tcp_check_urg.isra.0+0x1f3/0x710 net/ipv4/tcp_input.c:5567
tcp_urg net/ipv4/tcp_input.c:5608 [inline]
tcp_rcv_established+0x12ab/0x2130 net/ipv4/tcp_input.c:5942
tcp_v4_do_rcv+0x600/0x8d0 net/ipv4/tcp_ipv4.c:1716
tcp_v4_rcv+0x2768/0x3080 net/ipv4/tcp_ipv4.c:2110
ip_protocol_deliver_rcu+0xa7/0xee0 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
dst_input include/net/dst.h:460 [inline]
ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5462
__netif_receive_skb+0x24/0x1b0 net/core/dev.c:5576
process_backlog+0x2a5/0x6c0 net/core/dev.c:6452
__napi_poll+0xaf/0x440 net/core/dev.c:7017
napi_poll net/core/dev.c:7084 [inline]
net_rx_action+0x801/0xb40 net/core/dev.c:7171
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:920 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_write_lock_irq include/linux/rwlock_api_smp.h:194 [inline]
_raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:316
fasync_remove_entry+0xb6/0x1f0 fs/fcntl.c:891
fasync_helper+0x9e/0xb0 fs/fcntl.c:994
lease_modify fs/locks.c:1315 [inline]
lease_modify+0x28a/0x370 fs/locks.c:1302
locks_remove_lease fs/locks.c:2558 [inline]
locks_remove_file+0x29c/0x570 fs/locks.c:2583
__fput+0x1b9/0x9f0 fs/file_table.c:272
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:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
INITIAL READ USE at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1014 [inline]
kill_fasync fs/fcntl.c:1035 [inline]
kill_fasync+0x136/0x470 fs/fcntl.c:1028
sock_wake_async+0xd2/0x160 net/socket.c:1368
sk_wake_async include/net/sock.h:2400 [inline]
sk_wake_async+0x108/0x290 include/net/sock.h:2396
tcp_rcv_state_process+0x32a0/0x4bd0 net/ipv4/tcp_input.c:6486
tcp_v4_do_rcv+0x323/0x8d0 net/ipv4/tcp_ipv4.c:1738
sk_backlog_rcv include/net/sock.h:1030 [inline]
__release_sock+0x134/0x3b0 net/core/sock.c:2768
release_sock+0x54/0x1b0 net/core/sock.c:3300
inet_wait_for_connect net/ipv4/af_inet.c:593 [inline]
__inet_stream_connect+0x5db/0xed0 net/ipv4/af_inet.c:685
tcp_sendmsg_fastopen net/ipv4/tcp.c:1161 [inline]
tcp_sendmsg_locked+0x2010/0x2c60 net/ipv4/tcp.c:1203
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1422
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
__sys_sendto+0x21c/0x320 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044
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+0x44/0xae
}
... key at: [<ffffffff90308bc0>] __key.0+0x0/0x40
... acquired at:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1014 [inline]
kill_fasync fs/fcntl.c:1035 [inline]
kill_fasync+0x136/0x470 fs/fcntl.c:1028
snd_timer_user_ccallback+0x298/0x330 sound/core/timer.c:1387
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:697 [inline]
snd_timer_start sound/core/timer.c:690 [inline]
snd_timer_user_start.isra.0+0x1e3/0x260 sound/core/timer.c:1985
__snd_timer_user_ioctl.isra.0+0xda8/0x2490 sound/core/timer.c:2108
snd_timer_user_ioctl+0x77/0xb0 sound/core/timer.c:2129
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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+0x44/0xae

stack backtrace:
CPU: 1 PID: 30191 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #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:2577 [inline]
check_irq_usage.cold+0x4c1/0x6b0 kernel/locking/lockdep.c:2816
check_prev_add kernel/locking/lockdep.c:3067 [inline]
check_prevs_add kernel/locking/lockdep.c:3186 [inline]
validate_chain kernel/locking/lockdep.c:3801 [inline]
__lock_acquire+0x2a1f/0x54a0 kernel/locking/lockdep.c:5027
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
_raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1014 [inline]
kill_fasync fs/fcntl.c:1035 [inline]
kill_fasync+0x136/0x470 fs/fcntl.c:1028
snd_timer_user_ccallback+0x298/0x330 sound/core/timer.c:1387
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:697 [inline]
snd_timer_start sound/core/timer.c:690 [inline]
snd_timer_user_start.isra.0+0x1e3/0x260 sound/core/timer.c:1985
__snd_timer_user_ioctl.isra.0+0xda8/0x2490 sound/core/timer.c:2108
snd_timer_user_ioctl+0x77/0xb0 sound/core/timer.c:2129
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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+0x44/0xae
RIP: 0033:0x7f23cf480ae9
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:00007f23cc9f6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f23cf593f60 RCX: 00007f23cf480ae9
RDX: 0000000000000000 RSI: 00000000000054a0 RDI: 0000000000000003
RBP: 00007f23cf4daf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23cfac7b2f R14: 00007f23cc9f6300 R15: 0000000000022000
</TASK>

---
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