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Message-ID: <0000000000000457ff0616069d07@google.com>
Date: Sat, 13 Apr 2024 21:05:20 -0700
From: syzbot <syzbot+faf0acea764965b3e59e@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, linux-sound@...r.kernel.org, perex@...ex.cz,
syzkaller-bugs@...glegroups.com, tiwai@...e.com
Subject: [syzbot] [sound?] possible deadlock in _snd_pcm_stream_lock_irqsave (5)
Hello,
syzbot found the following issue on:
HEAD commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=136825a1180000
kernel config: https://syzkaller.appspot.com/x/.config?x=1a07d5da4eb21586
dashboard link: https://syzkaller.appspot.com/bug?extid=faf0acea764965b3e59e
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=133f3d6b180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10431e13180000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b42ab0fd4947/disk-fe46a7dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b8a6e7231930/vmlinux-fe46a7dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4fbf3e4ce6f8/bzImage-fe46a7dd.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+faf0acea764965b3e59e@...kaller.appspotmail.com
========================================================
WARNING: possible irq lock inversion dependency detected
6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted
--------------------------------------------------------
swapper/1/0 just changed the state of lock:
ffff888029f59110 (&group->lock#2){..-.}-{2:2}, at: _snd_pcm_stream_lock_irqsave+0xa0/0xd0 sound/core/pcm_native.c:170
but this lock took another, SOFTIRQ-unsafe lock in the past:
(&timer->lock){+.+.}-{2:2}
and interrupts could create inverse lock ordering between them.
other info that might help us debug this:
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&timer->lock);
local_irq_disable();
lock(&group->lock#2);
lock(&timer->lock);
<Interrupt>
lock(&group->lock#2);
*** DEADLOCK ***
no locks held by swapper/1/0.
the shortest dependencies between 2nd lock and 1st lock:
-> (&timer->lock){+.+.}-{2:2} {
HARDIRQ-ON-W at:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
class_spinlock_constructor include/linux/spinlock.h:561 [inline]
snd_timer_close_locked+0x65/0xbd0 sound/core/timer.c:412
snd_timer_close+0x8b/0xf0 sound/core/timer.c:464
snd_seq_timer_close+0xa4/0x100 sound/core/seq/seq_timer.c:302
queue_delete+0x49/0xa0 sound/core/seq/seq_queue.c:126
snd_seq_queue_client_leave+0x37/0x1a0 sound/core/seq/seq_queue.c:543
seq_free_client1.part.0+0x10a/0x260 sound/core/seq/seq_clientmgr.c:285
seq_free_client1 sound/core/seq/seq_clientmgr.c:278 [inline]
seq_free_client+0x74/0x170 sound/core/seq/seq_clientmgr.c:306
snd_seq_release+0x50/0xe0 sound/core/seq/seq_clientmgr.c:387
__fput+0x273/0xb80 fs/file_table.c:422
task_work_run+0x151/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa7d/0x2be0 kernel/exit.c:878
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
SOFTIRQ-ON-W at:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
class_spinlock_constructor include/linux/spinlock.h:561 [inline]
snd_timer_close_locked+0x65/0xbd0 sound/core/timer.c:412
snd_timer_close+0x8b/0xf0 sound/core/timer.c:464
snd_seq_timer_close+0xa4/0x100 sound/core/seq/seq_timer.c:302
queue_delete+0x49/0xa0 sound/core/seq/seq_queue.c:126
snd_seq_queue_client_leave+0x37/0x1a0 sound/core/seq/seq_queue.c:543
seq_free_client1.part.0+0x10a/0x260 sound/core/seq/seq_clientmgr.c:285
seq_free_client1 sound/core/seq/seq_clientmgr.c:278 [inline]
seq_free_client+0x74/0x170 sound/core/seq/seq_clientmgr.c:306
snd_seq_release+0x50/0xe0 sound/core/seq/seq_clientmgr.c:387
__fput+0x273/0xb80 fs/file_table.c:422
task_work_run+0x151/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa7d/0x2be0 kernel/exit.c:878
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
class_spinlock_constructor include/linux/spinlock.h:561 [inline]
snd_timer_close_locked+0x65/0xbd0 sound/core/timer.c:412
snd_timer_close+0x8b/0xf0 sound/core/timer.c:464
snd_seq_timer_close+0xa4/0x100 sound/core/seq/seq_timer.c:302
queue_delete+0x49/0xa0 sound/core/seq/seq_queue.c:126
snd_seq_queue_client_leave+0x37/0x1a0 sound/core/seq/seq_queue.c:543
seq_free_client1.part.0+0x10a/0x260 sound/core/seq/seq_clientmgr.c:285
seq_free_client1 sound/core/seq/seq_clientmgr.c:278 [inline]
seq_free_client+0x74/0x170 sound/core/seq/seq_clientmgr.c:306
snd_seq_release+0x50/0xe0 sound/core/seq/seq_clientmgr.c:387
__fput+0x273/0xb80 fs/file_table.c:422
task_work_run+0x151/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa7d/0x2be0 kernel/exit.c:878
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
}
... key at: [<ffffffff949c4860>] __key.6+0x0/0x40
... acquired at:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline]
snd_timer_notify+0x111/0x3e0 sound/core/timer.c:1040
snd_pcm_timer_notify sound/core/pcm_native.c:622 [inline]
snd_pcm_post_start+0x272/0x350 sound/core/pcm_native.c:1459
snd_pcm_action_single+0x10d/0x150 sound/core/pcm_native.c:1289
snd_pcm_action+0x70/0x90 sound/core/pcm_native.c:1370
__snd_pcm_lib_xfer+0x13f5/0x1ea0 sound/core/pcm_lib.c:2371
snd_pcm_oss_write3+0xd5/0x1e0 sound/core/oss/pcm_oss.c:1242
snd_pcm_oss_write2+0x31b/0x3f0 sound/core/oss/pcm_oss.c:1382
snd_pcm_oss_sync1+0x1bf/0x510 sound/core/oss/pcm_oss.c:1616
snd_pcm_oss_sync+0x617/0x7f0 sound/core/oss/pcm_oss.c:1692
snd_pcm_oss_release+0x291/0x320 sound/core/oss/pcm_oss.c:2575
__fput+0x273/0xb80 fs/file_table.c:422
task_work_run+0x151/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa7d/0x2be0 kernel/exit.c:878
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
-> (&group->lock#2){..-.}-{2:2} {
IN-SOFTIRQ-W at:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
_snd_pcm_stream_lock_irqsave+0xa0/0xd0 sound/core/pcm_native.c:170
class_pcm_stream_lock_irqsave_constructor include/sound/pcm.h:669 [inline]
snd_pcm_period_elapsed+0x20/0x50 sound/core/pcm_lib.c:1904
dummy_hrtimer_callback+0x9d/0x1c0 sound/drivers/dummy.c:385
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x20f/0xc20 kernel/time/hrtimer.c:1756
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1773
__do_softirq+0x21b/0x8de kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:633 [inline]
irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x88/0x510 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x313/0x3f0 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:313
common_startup_64+0x13e/0x148
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
spin_lock_irq include/linux/spinlock.h:376 [inline]
snd_pcm_group_lock_irq sound/core/pcm_native.c:97 [inline]
snd_pcm_stream_lock_irq sound/core/pcm_native.c:136 [inline]
class_pcm_stream_lock_irq_constructor include/sound/pcm.h:666 [inline]
snd_pcm_hw_params+0x151/0x1a30 sound/core/pcm_native.c:740
snd_pcm_kernel_ioctl+0x147/0x2d0 sound/core/pcm_native.c:3434
snd_pcm_oss_change_params_locked+0x146c/0x3aa0 sound/core/oss/pcm_oss.c:965
snd_pcm_oss_make_ready_locked+0xb7/0x130 sound/core/oss/pcm_oss.c:1187
snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1405 [inline]
snd_pcm_oss_write+0x4af/0xa10 sound/core/oss/pcm_oss.c:2796
vfs_write+0x29b/0x1100 fs/read_write.c:588
ksys_write+0x12f/0x260 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
}
... key at: [<ffffffff949c4be0>] __key.5+0x0/0x40
... acquired at:
mark_usage kernel/locking/lockdep.c:4567 [inline]
__lock_acquire+0x13d4/0x3b30 kernel/locking/lockdep.c:5091
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
_snd_pcm_stream_lock_irqsave+0xa0/0xd0 sound/core/pcm_native.c:170
class_pcm_stream_lock_irqsave_constructor include/sound/pcm.h:669 [inline]
snd_pcm_period_elapsed+0x20/0x50 sound/core/pcm_lib.c:1904
dummy_hrtimer_callback+0x9d/0x1c0 sound/drivers/dummy.c:385
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x20f/0xc20 kernel/time/hrtimer.c:1756
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1773
__do_softirq+0x21b/0x8de kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:633 [inline]
irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x88/0x510 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x313/0x3f0 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:313
common_startup_64+0x13e/0x148
stack backtrace:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_irq_inversion_bug.part.0+0x3e9/0x5a0 kernel/locking/lockdep.c:4080
print_irq_inversion_bug kernel/locking/lockdep.c:4033 [inline]
check_usage_forwards kernel/locking/lockdep.c:4111 [inline]
mark_lock_irq kernel/locking/lockdep.c:4243 [inline]
mark_lock+0x574/0xc60 kernel/locking/lockdep.c:4678
mark_usage kernel/locking/lockdep.c:4567 [inline]
__lock_acquire+0x13d4/0x3b30 kernel/locking/lockdep.c:5091
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
_snd_pcm_stream_lock_irqsave+0xa0/0xd0 sound/core/pcm_native.c:170
class_pcm_stream_lock_irqsave_constructor include/sound/pcm.h:669 [inline]
snd_pcm_period_elapsed+0x20/0x50 sound/core/pcm_lib.c:1904
dummy_hrtimer_callback+0x9d/0x1c0 sound/drivers/dummy.c:385
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x20f/0xc20 kernel/time/hrtimer.c:1756
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1773
__do_softirq+0x21b/0x8de kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:633 [inline]
irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 38 74 30 75 48 8b 00 a8 08 75 0c eb 07 0f 00 2d e8 b2 a6 00 fb f4 <fa> e9 00 c8 03 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197d58 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8ad342d9
RDX: 0000000000000001 RSI: ffff88801b6ae800 RDI: ffff88801b6ae864
RBP: ffff88801b6ae864 R08: 0000000000000001 R09: ffffed10172a6fdd
R10: ffff8880b9537eeb R11: 0000000000000000 R12: ffff8880183cf000
R13: ffffffff8e32a760 R14: 0000000000000001 R15: 0000000000000000
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x88/0x510 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x313/0x3f0 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:313
common_startup_64+0x13e/0x148
</TASK>
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 65 48 8b 05 38 74 30 mov %gs:0x75307438(%rip),%rax # 0x75307450
17: 75
18: 48 8b 00 mov (%rax),%rax
1b: a8 08 test $0x8,%al
1d: 75 0c jne 0x2b
1f: eb 07 jmp 0x28
21: 0f 00 2d e8 b2 a6 00 verw 0xa6b2e8(%rip) # 0xa6b310
28: fb sti
29: f4 hlt
* 2a: fa cli <-- trapping instruction
2b: e9 00 c8 03 00 jmp 0x3c830
30: 90 nop
31: 90 nop
32: 90 nop
33: 90 nop
34: 90 nop
35: 90 nop
36: 90 nop
37: 90 nop
38: 90 nop
39: 90 nop
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
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If the report is already addressed, let syzbot know by replying with:
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If you want syzbot to run the reproducer, reply with:
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