================================ WARNING: inconsistent lock state 6.8.0-rc2-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. udevd/1928 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff8881023f3148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff8881023f3148 (&timer->lock){+.?.}-{2:2}, at: snd_timer_interrupt.part.0+0x23/0x3f0 sound/core/timer.c:818 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0xcd/0x2d0 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+0x2e/0x2f0 sound/core/timer.c:412 snd_timer_close sound/core/timer.c:464 [inline] snd_timer_user_release+0x76/0x140 sound/core/timer.c:1468 __fput+0x8d/0x2c0 fs/file_table.c:376 __do_sys_close fs/open.c:1554 [inline] __se_sys_close fs/open.c:1539 [inline] __x64_sys_close+0x38/0x80 fs/open.c:1539 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x86/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6f/0x77 irq event stamp: 603783 hardirqs last enabled at (603782): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (603782): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (603783): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (603783): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (596962): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last enabled at (596962): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last enabled at (596962): [] irq_exit_rcu+0x8e/0xf0 kernel/softirq.c:644 softirqs last disabled at (603779): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (603779): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (603779): [] irq_exit_rcu+0x8e/0xf0 kernel/softirq.c:644 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&timer->lock); lock(&timer->lock); *** DEADLOCK *** 1 lock held by udevd/1928: #0: ffffc900001b3dc8 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x6c/0x1d0 kernel/time/timer.c:1697 stack backtrace: CPU: 1 PID: 1928 Comm: udevd Not tainted 6.8.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x5c/0xc0 lib/dump_stack.c:106 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+0x621/0x750 kernel/locking/lockdep.c:4678 mark_usage kernel/locking/lockdep.c:4567 [inline] __lock_acquire+0xade/0x1a90 kernel/locking/lockdep.c:5091 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0xcd/0x2d0 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+0x23/0x3f0 sound/core/timer.c:818 call_timer_fn+0x9a/0x1d0 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x1dd/0x2a0 kernel/time/timer.c:2038 run_timer_softirq+0x2a/0x50 kernel/time/timer.c:2051 __do_softirq+0x161/0x42a kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0x8e/0xf0 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x57/0xc0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0033:0x7fc3303ba41e Code: 29 c5 48 01 c3 48 8b 55 08 48 83 e2 f8 48 39 c2 0f 85 f9 fc ff ff 48 89 ef e8 78 f5 ff ff 4d 39 6e 60 74 6e 43 f6 44 25 08 01 <75> 0d 4c 89 ef 4c 01 e3 e8 5f f5 ff ff eb 05 49 83 65 08 fe 49 8b RSP: 002b:00007ffdd520ba50 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000008040 RCX: 0000000000000802 RDX: 0000000000020c80 RSI: 000056190e2cc010 RDI: 00007fc3304a893d RBP: 000056190e321d30 R08: 0000000000000000 R09: 0000000001000000 R10: 0000000000000812 R11: 0000000000000293 R12: 0000000000002cc0 R13: 000056190e329d70 R14: 00007fc3304e4aa0 R15: 0000000000000000