================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.0/5681 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029a1c948 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029a1c948 (&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_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+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: 31035 hardirqs last enabled at (31034): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:351 hardirqs last disabled at (31035): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (31035): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (28614): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (28614): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (30989): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (30989): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (30989): [] 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.0/5681: #0: ffffc90000a08cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 1 PID: 5681 Comm: syz-executor.0 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_vma_under_rcu+0x6e/0x950 mm/memory.c:5616 Code: 00 00 00 00 00 fc ff df 48 c7 44 24 28 c0 5d d1 81 48 01 c8 c7 00 f1 f1 f1 f1 c7 40 0c f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 <48> 89 84 24 b0 00 00 00 31 c0 e8 73 9a bb ff 48 c7 44 24 70 00 00 RSP: 0000:ffffc9000348fdf0 EFLAGS: 00000282 RAX: 138194b28a87de00 RBX: ffff88807d44cc40 RCX: 1ffff92000691fc1 RDX: 0000000000040000 RSI: 00007ff1ba440000 RDI: ffff88807d44cc00 RBP: ffffc9000348ff58 R08: 0000000000000007 R09: ffffffffff600000 R10: 00007ff1ba440000 R11: 00007ff1c4625530 R12: 00007ff1ba440000 R13: 0000000000000254 R14: 00007ff1ba440000 R15: ffff88807d44cc00 do_user_addr_fault+0x3d7/0x1080 arch/x86/mm/fault.c:1354 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: 0033:0x7ff1c38298e6 Code: f0 72 6e 48 63 cd 48 01 c1 49 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 RSP: 002b:00007ff1c4625530 EFLAGS: 00010206 RAX: 0000000000e40001 RBX: 00007ff1c46255d0 RCX: 00000000000000a0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007ff1c4625670 RBP: 0000000000000102 R08: 00007ff1b9600000 R09: 0000000000e40000 R10: 0000000000000000 R11: 00007ff1c46255e0 R12: 0000000000000001 R13: 00007ff1c38ece40 R14: 0000000000000000 R15: 00007ff1c4625670 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 c7 fisttps -0x39(%rax) 3: 44 24 28 rex.R and $0x28,%al 6: c0 5d d1 81 rcrb $0x81,-0x2f(%rbp) a: 48 01 c8 add %rcx,%rax d: c7 00 f1 f1 f1 f1 movl $0xf1f1f1f1,(%rax) 13: c7 40 0c f3 f3 f3 f3 movl $0xf3f3f3f3,0xc(%rax) 1a: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax 21: 00 00 * 23: 48 89 84 24 b0 00 00 mov %rax,0xb0(%rsp) <-- trapping instruction 2a: 00 2b: 31 c0 xor %eax,%eax 2d: e8 73 9a bb ff call 0xffbb9aa5 32: 48 rex.W 33: c7 .byte 0xc7 34: 44 24 70 rex.R and $0x70,%al