================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.0/5076 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff888029d5b948 (&timer->lock){?.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff888029d5b948 (&timer->lock){?.+.}-{2:2}, at: class_spinlock_constructor include/linux/spinlock.h:561 [inline] ffff888029d5b948 (&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_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: 1610698 hardirqs last enabled at (1610697): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (1610697): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (1610698): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1043 softirqs last enabled at (1609912): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (1609912): [] fpregs_unlock arch/x86/include/asm/fpu/api.h:80 [inline] softirqs last enabled at (1609912): [] fpu_clone+0x393/0xb60 arch/x86/kernel/fpu/core.c:634 softirqs last disabled at (1609910): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (1609910): [] fpregs_lock arch/x86/include/asm/fpu/api.h:72 [inline] softirqs last disabled at (1609910): [] fpu_clone+0x328/0xb60 arch/x86/kernel/fpu/core.c:630 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.0/5076: #0: ffffffff8d40a098 (tasklist_lock){.+.+}-{2:2}, at: __do_wait+0x105/0x890 kernel/exit.c:1587 stack backtrace: CPU: 0 PID: 5076 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: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:wait_consider_task+0x2/0x4150 kernel/exit.c:1364 Code: e8 93 72 96 00 e9 62 fb ff ff 4c 89 f7 e8 46 73 96 00 e9 b7 fa ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 <41> 56 41 55 49 89 d5 41 54 4d 8d bd 58 05 00 00 55 48 bd 00 00 00 RSP: 0018:ffffc9000359fc20 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888025af9e00 RCX: ffffffff81514002 RDX: ffff888025af9e00 RSI: 0000000000000000 RDI: ffffc9000359fce8 RBP: ffffc9000359fce8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888063853c00 R14: 1ffff920006b3f9d R15: ffff8880638541e0 do_wait_thread kernel/exit.c:1479 [inline] __do_wait+0x1e2/0x890 kernel/exit.c:1597 do_wait+0x219/0x540 kernel/exit.c:1631 kernel_wait4+0x16c/0x280 kernel/exit.c:1790 __do_sys_wait4+0x15f/0x170 kernel/exit.c:1818 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: 0033:0x7ffa4667a897 Code: 89 7c 24 10 48 89 4c 24 18 e8 d5 a3 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 25 a4 02 00 8b 44 RSP: 002b:00007ffc45082e30 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000000112 RCX: 00007ffa4667a897 RDX: 0000000040000001 RSI: 00007ffc45082ebc RDI: 00000000ffffffff RBP: 00007ffc45082ebc R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 000000000003c775 R14: 000000000003c70e R15: 0000000000000008 ---------------- Code disassembly (best guess): 0: e8 93 72 96 00 call 0x967298 5: e9 62 fb ff ff jmp 0xfffffb6c a: 4c 89 f7 mov %r14,%rdi d: e8 46 73 96 00 call 0x967358 12: e9 b7 fa ff ff jmp 0xffffface 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 41 57 push %r15 * 2a: 41 56 push %r14 <-- trapping instruction 2c: 41 55 push %r13 2e: 49 89 d5 mov %rdx,%r13 31: 41 54 push %r12 33: 4d 8d bd 58 05 00 00 lea 0x558(%r13),%r15 3a: 55 push %rbp 3b: 48 rex.W 3c: bd .byte 0xbd 3d: 00 00 add %al,(%rax)