================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.1/6618 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029e38148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029e38148 (&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: 239 hardirqs last enabled at (238): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:351 hardirqs last disabled at (239): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (239): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (0): [] copy_process+0x24cc/0x9160 kernel/fork.c:2335 softirqs last disabled at (233): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (233): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (233): [] 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); lock(&timer->lock); *** DEADLOCK *** 1 lock held by syz-executor.1/6618: #0: ffffc90000007cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 0 PID: 6618 Comm: syz-executor.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: __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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_is_held_type+0x107/0x150 kernel/locking/lockdep.c:5830 Code: 00 00 b8 ff ff ff ff 65 0f c1 05 2c 43 30 75 83 f8 01 75 2d 9c 58 f6 c4 02 75 43 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 45 31 ed eb RSP: 0018:ffffc90002e1fd18 EFLAGS: 00000286 RAX: 0000000000000046 RBX: 1ffff920005c3fac RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8b0cba40 RDI: ffffffff8b6e88a0 RBP: ffffffff8d7b0880 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805d1cda00 R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000000 lock_is_held include/linux/lockdep.h:231 [inline] __might_resched+0x473/0x5e0 kernel/sched/core.c:10149 __might_fault+0x83/0x190 mm/memory.c:6077 rseq_get_rseq_cs kernel/rseq.c:161 [inline] rseq_ip_fixup kernel/rseq.c:281 [inline] __rseq_handle_notify_resume+0x14a/0x1030 kernel/rseq.c:329 rseq_handle_notify_resume include/linux/rseq.h:38 [inline] resume_user_mode_work include/linux/resume_user_mode.h:62 [inline] exit_to_user_mode_loop kernel/entry/common.c:108 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0x19d/0x2a0 kernel/entry/common.c:212 do_syscall_64+0xe2/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f3c3c47de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3c3bfff178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 00007f3c3c5abf88 RCX: 00007f3c3c47de69 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3c3c5abf88 RBP: 00007f3c3c5abf80 R08: 00007f3c3bfff6c0 R09: 00007f3c3bfff6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3c3c5abf8c R13: 000000000000000b R14: 00007ffe2477fa80 R15: 00007ffe2477fb68 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: b8 ff ff ff ff mov $0xffffffff,%eax 7: 65 0f c1 05 2c 43 30 xadd %eax,%gs:0x7530432c(%rip) # 0x7530433b e: 75 f: 83 f8 01 cmp $0x1,%eax 12: 75 2d jne 0x41 14: 9c pushf 15: 58 pop %rax 16: f6 c4 02 test $0x2,%ah 19: 75 43 jne 0x5e 1b: 48 f7 04 24 00 02 00 testq $0x200,(%rsp) 22: 00 23: 74 01 je 0x26 25: fb sti 26: 48 83 c4 08 add $0x8,%rsp * 2a: 44 89 e8 mov %r13d,%eax <-- trapping instruction 2d: 5b pop %rbx 2e: 5d pop %rbp 2f: 41 5c pop %r12 31: 41 5d pop %r13 33: 41 5e pop %r14 35: 41 5f pop %r15 37: c3 ret 38: cc int3 39: cc int3 3a: cc int3 3b: cc int3 3c: 45 31 ed xor %r13d,%r13d 3f: eb .byte 0xeb