================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.1/8541 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff88802994d948 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff88802994d948 (&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: 2625 hardirqs last enabled at (2624): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (2624): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (2625): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (2625): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (2232): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (2232): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (2611): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (2611): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (2611): [] 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 *** 2 locks held by syz-executor.1/8541: #0: ffff88807cbd3120 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline] #0: ffff88807cbd3120 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5497 [inline] #0: ffff88807cbd3120 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x35/0x580 mm/memory.c:5557 #1: ffffc90000a08cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 1 PID: 8541 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:__orc_find+0xc9/0x130 arch/x86/kernel/unwind_orc.c:106 Code: 0c 32 4c 89 fa 83 e2 07 83 c2 03 38 ca 7c 04 84 c9 75 73 49 63 17 4c 89 e7 4d 8d 2c 17 4c 89 ee e8 0c 67 50 00 4d 39 ec 73 95 b2 6c 50 00 49 8d 6f fc e8 a9 6c 50 00 48 39 dd 73 99 e8 9f 6c RSP: 0018:ffffc900030af828 EFLAGS: 00000287 RAX: 0000000000000000 RBX: ffffffff9020fa30 RCX: ffffffff813c8bf4 RDX: ffff8880265f9e00 RSI: ffffffff8ad240bb RDI: 0000000000000006 RBP: ffffffff9020fa40 R08: 0000000000000006 R09: ffffffff8ad240bb R10: ffffffff8ad240cb R11: 0000000000000001 R12: ffffffff8ad240bb R13: ffffffff8ad240cb R14: dffffc0000000000 R15: ffffffff9020fa38 orc_find arch/x86/kernel/unwind_orc.c:227 [inline] unwind_next_frame+0x335/0x23a0 arch/x86/kernel/unwind_orc.c:494 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3852 anon_vma_alloc mm/rmap.c:94 [inline] __anon_vma_prepare+0x2c3/0x550 mm/rmap.c:203 anon_vma_prepare include/linux/rmap.h:164 [inline] do_anonymous_page mm/memory.c:4289 [inline] do_pte_missing mm/memory.c:3743 [inline] handle_pte_fault mm/memory.c:5164 [inline] __handle_mm_fault+0x474d/0x4920 mm/memory.c:5305 handle_mm_fault+0x476/0xa00 mm/memory.c:5470 do_user_addr_fault+0x2e5/0x1080 arch/x86/mm/fault.c:1413 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: 0033:0x7f863ca53146 Code: 8d 3c 30 4c 89 de 4c 89 54 24 38 e8 f4 ad 02 00 4c 8b 54 24 38 85 c0 0f 85 57 01 00 00 48 8b 44 24 28 48 89 df 4c 89 54 24 38 <4c> 89 93 98 06 00 00 48 89 83 90 06 00 00 48 8d 83 10 03 00 00 4c RSP: 002b:00007ffdcf84c920 EFLAGS: 00010246 RAX: 00007f863d78c000 RBX: 00007f863d7ac6c0 RCX: 00007f863ca7df27 RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f863d7ac6c0 RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000021000 R11: 0000000000000206 R12: 00007ffdcf84cbc0 R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 0c 32 or $0x32,%al 2: 4c 89 fa mov %r15,%rdx 5: 83 e2 07 and $0x7,%edx 8: 83 c2 03 add $0x3,%edx b: 38 ca cmp %cl,%dl d: 7c 04 jl 0x13 f: 84 c9 test %cl,%cl 11: 75 73 jne 0x86 13: 49 63 17 movslq (%r15),%rdx 16: 4c 89 e7 mov %r12,%rdi 19: 4d 8d 2c 17 lea (%r15,%rdx,1),%r13 1d: 4c 89 ee mov %r13,%rsi 20: e8 0c 67 50 00 call 0x506731 25: 4d 39 ec cmp %r13,%r12 28: 73 95 jae 0xffffffbf * 2a: e8 b2 6c 50 00 call 0x506ce1 <-- trapping instruction 2f: 49 8d 6f fc lea -0x4(%r15),%rbp 33: e8 a9 6c 50 00 call 0x506ce1 38: 48 39 dd cmp %rbx,%rbp 3b: 73 99 jae 0xffffffd6 3d: e8 .byte 0xe8 3e: 9f lahf 3f: 6c insb (%dx),%es:(%rdi)