================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.2/6351 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff888029b76948 (&timer->lock){?.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff888029b76948 (&timer->lock){?.+.}-{2:2}, at: class_spinlock_constructor include/linux/spinlock.h:561 [inline] ffff888029b76948 (&timer->lock){?.+.}-{2:2}, at: snd_hrtimer_callback+0x4d/0x420 sound/core/hrtimer.c:38 {HARDIRQ-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: 9692 hardirqs last enabled at (9691): [] ___slab_alloc+0x81d/0x1790 mm/slub.c:3431 hardirqs last disabled at (9692): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1043 softirqs last enabled at (8424): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (8424): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (8415): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (8415): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (8415): [] 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 *** no locks held by syz-executor.2/6351. stack backtrace: CPU: 1 PID: 6351 Comm: syz-executor.2 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:4564 [inline] __lock_acquire+0x1359/0x3b30 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 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_hrtimer_callback+0x4d/0x420 sound/core/hrtimer.c:38 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xc20 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:___slab_alloc+0x1cf/0x1790 mm/slub.c:3470 Code: 00 00 48 89 df 48 8d 35 00 00 00 00 e8 ca 41 8e ff 48 83 bd 58 ff ff ff 00 0f 85 54 06 00 00 9c 58 f6 c4 02 0f 85 61 09 00 00 <49> 83 7d 18 00 0f 84 f2 03 00 00 65 4c 8b 35 fe d2 26 7e 9c 5b fa RSP: 0018:ffffc900039dfbc0 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff8880b9545490 RCX: 1ffffffff1f3c599 RDX: 0000000000000000 RSI: ffffffff8b0cb740 RDI: ffffffff8b6e88a0 RBP: ffffc900039dfca0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8f9e6f97 R11: 0000000000000000 R12: ffff888015ef0280 R13: ffff8880b9545470 R14: 0000000000000001 R15: ffff8880b9545490 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3852 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags include/linux/audit.h:322 [inline] getname+0x8f/0xe0 fs/namei.c:218 do_sys_openat2+0x104/0x1e0 fs/open.c:1400 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1432 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: 0033:0x7f812507ca60 Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 09 82 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 5c 82 02 00 8b 44 RSP: 002b:00007f8125e15e30 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f812507ca60 RDX: 0000000000000002 RSI: 00007f8125e15f40 RDI: 00000000ffffff9c RBP: 00007f8125e15f40 R08: 0000000000000000 R09: 000000000000064e R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000009 R13: 00007f8125e15f80 R14: 00007f8125e15f40 R15: 00007f811ae00000 vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 89 df mov %rbx,%rdi 5: 48 8d 35 00 00 00 00 lea 0x0(%rip),%rsi # 0xc c: e8 ca 41 8e ff call 0xff8e41db 11: 48 83 bd 58 ff ff ff cmpq $0x0,-0xa8(%rbp) 18: 00 19: 0f 85 54 06 00 00 jne 0x673 1f: 9c pushf 20: 58 pop %rax 21: f6 c4 02 test $0x2,%ah 24: 0f 85 61 09 00 00 jne 0x98b * 2a: 49 83 7d 18 00 cmpq $0x0,0x18(%r13) <-- trapping instruction 2f: 0f 84 f2 03 00 00 je 0x427 35: 65 4c 8b 35 fe d2 26 mov %gs:0x7e26d2fe(%rip),%r14 # 0x7e26d33b 3c: 7e 3d: 9c pushf 3e: 5b pop %rbx 3f: fa cli