================================
WARNING: inconsistent lock state
6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
syz-executor.3/9834 [HC0[0]:SC1[1]:HE0:SE0] takes:
ffff888029fa5148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline]
ffff888029fa5148 (&timer->lock){+.?.}-{2:2}, at: snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818
{SOFTIRQ-ON-W} state was registered 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_delete+0x45/0x60 sound/core/seq/seq_queue.c:188
snd_seq_kernel_client_ctl+0x107/0x1c0 sound/core/seq/seq_clientmgr.c:2526
delete_seq_queue.isra.0+0xc8/0x150 sound/core/seq/oss/seq_oss_init.c:371
odev_release+0x52/0x80 sound/core/seq/oss/seq_oss.c:144
__fput+0x270/0xb80 fs/file_table.c:422
__fput_sync+0x47/0x50 fs/file_table.c:507
__do_sys_close fs/open.c:1556 [inline]
__se_sys_close fs/open.c:1541 [inline]
__x64_sys_close+0x86/0x100 fs/open.c:1541
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
irq event stamp: 345
hardirqs last enabled at (344): [<ffffffff8ad60263>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (344): [<ffffffff8ad60263>] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
hardirqs last disabled at (345): [<ffffffff8ad60002>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (345): [<ffffffff8ad60002>] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162
softirqs last enabled at (0): [<ffffffff814f168c>] copy_process+0x24cc/0x9160 kernel/fork.c:2335
softirqs last disabled at (341): [<ffffffff8151a149>] invoke_softirq kernel/softirq.c:428 [inline]
softirqs last disabled at (341): [<ffffffff8151a149>] __irq_exit_rcu kernel/softirq.c:633 [inline]
softirqs last disabled at (341): [<ffffffff8151a149>] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&timer->lock);
<Interrupt>
lock(&timer->lock);
*** DEADLOCK ***
2 locks held by syz-executor.3/9834:
#0: ffff88806c909070 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:663 [inline]
#0: ffff88806c909070 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1e2/0x950 mm/memory.c:5626
#1: ffffc90000a08cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789
stack backtrace:
CPU: 1 PID: 9834 Comm: syz-executor.3 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_usage_bug kernel/locking/lockdep.c:3971 [inline]
valid_state kernel/locking/lockdep.c:4013 [inline]
mark_lock_irq kernel/locking/lockdep.c:4216 [inline]
mark_lock+0x923/0xc60 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
class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline]
snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818
snd_timer_interrupt sound/core/timer.c:1107 [inline]
snd_timer_s_function+0x14f/0x200 sound/core/timer.c:1107
call_timer_fn+0x1a0/0x5b0 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1843 [inline]
__run_timers+0x74b/0xab0 kernel/time/timer.c:2408
__run_timer_base kernel/time/timer.c:2419 [inline]
__run_timer_base kernel/time/timer.c:2412 [inline]
run_timer_base+0x111/0x190 kernel/time/timer.c:2428
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2438
__do_softirq+0x218/0x8de 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:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:mem_cgroup_enter_user_fault include/linux/memcontrol.h:954 [inline]
RIP: 0010:handle_mm_fault+0x7dd/0xa00 mm/memory.c:5463
Code: ba ff 44 89 eb 31 ff 83 e3 01 89 de e8 4c 97 ba ff 85 db 0f 85 fc fc ff ff e8 5f 9c ba ff 31 ff e8 18 c5 1c 00 e9 eb fc ff ff <e8> 4e 9c ba ff 48 b8 00 00 00 00 00 fc ff df 65 4c 8b 2d 4c 77 31
RSP: 0000:ffffc90003b2fe80 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffff88802315db00 RCX: ffffffff81d25791
RDX: ffff88802c531e00 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000001255 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000000 R12: ffff88802315db20
R13: ffff88802c531e00 R14: ffff88802315db10 R15: 0000000000000040
do_user_addr_fault+0x426/0x1080 arch/x86/mm/fault.c:1362
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1563
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7ff8662298f0
Code: 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 47 0f b6 0c 08 45 84 c9 74 08 <45> 88 0c 00 49 8b 47 10 48 83 c0 01 49 89 47 10 83 e9 01 73 d3 41
RSP: 002b:00007ff866f6d530 EFLAGS: 00010202
RAX: 000000000000e000 RBX: 00007ff866f6d5d0 RCX: 000000000000000f
RDX: 000000000006afff RSI: 0000000000004000 RDI: 00007ff866f6d670
RBP: 0000000000000012 R08: 00007ff85c000000 R09: 0000000000000046
R10: 0000000020024782 R11: 000000000001f22b R12: 0000000000003001
R13: 00007ff8662ece40 R14: 000000000000001b R15: 00007ff866f6d670
</TASK>
vkms_vblank_simulate: vblank timer overrun
----------------
Code disassembly (best guess):
0: ba ff 44 89 eb mov $0xeb8944ff,%edx
5: 31 ff xor %edi,%edi
7: 83 e3 01 and $0x1,%ebx
a: 89 de mov %ebx,%esi
c: e8 4c 97 ba ff call 0xffba975d
11: 85 db test %ebx,%ebx
13: 0f 85 fc fc ff ff jne 0xfffffd15
19: e8 5f 9c ba ff call 0xffba9c7d
1e: 31 ff xor %edi,%edi
20: e8 18 c5 1c 00 call 0x1cc53d
25: e9 eb fc ff ff jmp 0xfffffd15
* 2a: e8 4e 9c ba ff call 0xffba9c7d <-- trapping instruction
2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
36: fc ff df
39: 65 gs
3a: 4c rex.WR
3b: 8b .byte 0x8b
3c: 2d .byte 0x2d
3d: 4c 77 31 rex.WR ja 0x71