================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.0/6733 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029b71148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029b71148 (&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: 205 hardirqs last enabled at (204): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (204): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (205): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (205): [] _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 (197): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (197): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (197): [] 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 *** 6 locks held by syz-executor.0/6733: #0: ffff88802ae7e580 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:663 [inline] #0: ffff88802ae7e580 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1e2/0x950 mm/memory.c:5626 #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: do_fault_around mm/memory.c:4715 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: do_read_fault mm/memory.c:4749 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: do_fault mm/memory.c:4888 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: do_pte_missing mm/memory.c:3745 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: handle_pte_fault mm/memory.c:5164 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: __handle_mm_fault+0x314f/0x4920 mm/memory.c:5305 #2: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #2: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #2: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: filemap_map_pages+0x178/0x1290 mm/filemap.c:3532 #3: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #3: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #3: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x42/0x540 mm/pgtable-generic.c:285 #4: ffff8880222f0018 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #4: ffff8880222f0018 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: __pte_offset_map_lock+0xf1/0x300 mm/pgtable-generic.c:373 #5: ffffc90000007cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 0 PID: 6733 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:filemap_map_order0_folio mm/filemap.c:3510 [inline] RIP: 0010:filemap_map_pages+0x46f/0x1290 mm/filemap.c:3559 Code: 49 89 e8 4c 89 ff b9 01 00 00 00 48 89 f2 e8 c8 66 13 00 4c 8b 6c 24 18 be 04 00 00 00 4c 89 ef e8 b6 5c 29 00 f0 41 ff 45 00 <31> c0 48 39 dd 0f 94 c0 c1 e0 08 09 84 24 80 00 00 00 e8 9a 1d cf RSP: 0000:ffffc90002fcfba0 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 00007f53ac6a9000 RCX: ffffffff81bddafa RDX: fffff940003ac0a7 RSI: 0000000000000004 RDI: ffffea0001d60534 RBP: 00007f53ac6a2000 R08: 0000000000000001 R09: fffff940003ac0a6 R10: ffffea0001d60537 R11: 0000000000000005 R12: 00000000000000a2 R13: ffffea0001d60534 R14: 00000000000000a2 R15: ffffc90002fcfd98 do_fault_around mm/memory.c:4716 [inline] do_read_fault mm/memory.c:4749 [inline] do_fault mm/memory.c:4888 [inline] do_pte_missing mm/memory.c:3745 [inline] handle_pte_fault mm/memory.c:5164 [inline] __handle_mm_fault+0x31e1/0x4920 mm/memory.c:5305 handle_mm_fault+0x476/0xa00 mm/memory.c:5470 do_user_addr_fault+0x426/0x1080 arch/x86/mm/fault.c:1362 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: 0033:0x7f53ac6a9920 Code: Unable to access opcode bytes at 0x7f53ac6a98f6. RSP: 002b:00007ffd786e3ff8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f53ac67f20d RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: 00007f53ad2db320 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: 49 89 e8 mov %rbp,%r8 3: 4c 89 ff mov %r15,%rdi 6: b9 01 00 00 00 mov $0x1,%ecx b: 48 89 f2 mov %rsi,%rdx e: e8 c8 66 13 00 call 0x1366db 13: 4c 8b 6c 24 18 mov 0x18(%rsp),%r13 18: be 04 00 00 00 mov $0x4,%esi 1d: 4c 89 ef mov %r13,%rdi 20: e8 b6 5c 29 00 call 0x295cdb 25: f0 41 ff 45 00 lock incl 0x0(%r13) * 2a: 31 c0 xor %eax,%eax <-- trapping instruction 2c: 48 39 dd cmp %rbx,%rbp 2f: 0f 94 c0 sete %al 32: c1 e0 08 shl $0x8,%eax 35: 09 84 24 80 00 00 00 or %eax,0x80(%rsp) 3c: e8 .byte 0xe8 3d: 9a (bad) 3e: 1d .byte 0x1d 3f: cf iret