================================
WARNING: inconsistent lock state
6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
udevd/4513 [HC0[0]:SC1[1]:HE0:SE0] takes:
ffff888029976948 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline]
ffff888029976948 (&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_timer_user_release+0x91/0x260 sound/core/timer.c:1468
__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: 1250859
hardirqs last enabled at (1250858): [<ffffffff8ad60263>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (1250858): [<ffffffff8ad60263>] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
hardirqs last disabled at (1250859): [<ffffffff8ad60002>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (1250859): [<ffffffff8ad60002>] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162
softirqs last enabled at (1249258): [<ffffffff8ad63156>] softirq_handle_end kernel/softirq.c:400 [inline]
softirqs last enabled at (1249258): [<ffffffff8ad63156>] __do_softirq+0x596/0x8de kernel/softirq.c:583
softirqs last disabled at (1250803): [<ffffffff8151a149>] invoke_softirq kernel/softirq.c:428 [inline]
softirqs last disabled at (1250803): [<ffffffff8151a149>] __irq_exit_rcu kernel/softirq.c:633 [inline]
softirqs last disabled at (1250803): [<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 udevd/4513:
#0: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline]
#0: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline]
#0: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1108 [inline]
#0: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_path_perm+0x25f/0x450 security/tomoyo/file.c:821
#1: ffffc90000a08cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789
stack backtrace:
CPU: 1 PID: 4513 Comm: udevd 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:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x60 kernel/kcov.c:207
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 04 db 76 7e 65 8b 05 05 db 76 7e a9 00 01 ff 00 48 8b 34 24 <74> 0f f6 c4 01 74 35 8b 82 14 16 00 00 85 c0 74 2b 8b 82 f0 15 00
RSP: 0018:ffffc90003497a30 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffff88801f39489c RCX: ffffffff843ae29a
RDX: ffff88807ae35a00 RSI: ffffffff843ae1fa RDI: 0000000000000001
RBP: 000000000000006f R08: 0000000000000001 R09: 000000000000005c
R10: 000000000000006f R11: 0000000000000001 R12: 0000000000000027
R13: ffff88807b1daff3 R14: 000000000000001c R15: dffffc0000000000
tomoyo_encode2+0x13a/0x3e0 security/tomoyo/realpath.c:56
tomoyo_encode+0x29/0x50 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x19d/0x720 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x273/0x450 security/tomoyo/file.c:822
security_inode_getattr+0xf4/0x160 security/security.c:2263
vfs_getattr fs/stat.c:173 [inline]
vfs_fstat+0x53/0xd0 fs/stat.c:198
vfs_fstatat+0x134/0x150 fs/stat.c:300
__do_sys_newfstatat+0x98/0x120 fs/stat.c:468
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
RIP: 0033:0x7fdaf4b165f4
Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffd8e321808 EFLAGS: 00000202 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00005638f94e7cc0 RCX: 00007fdaf4b165f4
RDX: 00007ffd8e321820 RSI: 00007fdaf4bb3130 RDI: 000000000000000d
RBP: 00005638f95000d0 R08: 0000000000090800 R09: 00005638f94c95a0
R10: 0000000000001000 R11: 0000000000000202 R12: 00007ffd8e321820
R13: 00000000000000ff R14: 00005638d28ab1c4 R15: 0000000000000000
</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: f3 0f 1e fa endbr64
12: 65 48 8b 15 04 db 76 mov %gs:0x7e76db04(%rip),%rdx # 0x7e76db1e
19: 7e
1a: 65 8b 05 05 db 76 7e mov %gs:0x7e76db05(%rip),%eax # 0x7e76db26
21: a9 00 01 ff 00 test $0xff0100,%eax
26: 48 8b 34 24 mov (%rsp),%rsi
* 2a: 74 0f je 0x3b <-- trapping instruction
2c: f6 c4 01 test $0x1,%ah
2f: 74 35 je 0x66
31: 8b 82 14 16 00 00 mov 0x1614(%rdx),%eax
37: 85 c0 test %eax,%eax
39: 74 2b je 0x66
3b: 8b .byte 0x8b
3c: 82 (bad)
3d: f0 lock
3e: 15 .byte 0x15