================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/7241 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029643948 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029643948 (&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: 177 hardirqs last enabled at (176): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:351 hardirqs last disabled at (177): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (177): [] _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 (167): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (167): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (167): [] 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 *** 4 locks held by syz-executor.3/7241: #0: ffff888017bb0070 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:663 [inline] #0: ffff888017bb0070 (&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: ffffc90000a08cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 1 PID: 7241 Comm: syz-executor.3 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:xas_descend+0x179/0x4f0 lib/xarray.c:218 Code: 48 89 fa 48 c1 ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 d4 02 00 00 40 88 6b 12 48 83 c4 20 4c 89 e8 5b 5d <41> 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e8 a5 ac c7 f6 49 81 fd fd RSP: 0000:ffffc900040efa20 EFLAGS: 00000282 RAX: ffffea0001e0ef00 RBX: ffff88801d470dc2 RCX: ffffffff8ac54bb6 RDX: 0000000000000002 RSI: ffffffff8ac54bc1 RDI: ffffc900040efc7a RBP: ffff88801d470dc0 R08: 0000000000000007 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000002 R12: ffff88801d470dc0 R13: ffffea0001e0ef00 R14: 0000000000000000 R15: 0000000000000001 xas_load+0xe4/0x140 lib/xarray.c:244 xas_find+0x60f/0x870 lib/xarray.c:1250 xas_next_entry+0x267/0x3c0 include/linux/xarray.h:1704 next_uptodate_folio+0x29/0x550 mm/filemap.c:3395 filemap_map_pages+0x1bd/0x1290 mm/filemap.c:3533 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: 0033:0x7fe958a38513 Code: Unable to access opcode bytes at 0x7fe958a384e9. RSP: 002b:00007ffc816741d0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: 00007fe9596db320 R10: 000055556cdc9480 R11: 00007fe9596db320 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: 48 89 fa mov %rdi,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax b: 48 89 fa mov %rdi,%rdx e: 83 e2 07 and $0x7,%edx 11: 38 d0 cmp %dl,%al 13: 7f 08 jg 0x1d 15: 84 c0 test %al,%al 17: 0f 85 d4 02 00 00 jne 0x2f1 1d: 40 88 6b 12 mov %bpl,0x12(%rbx) 21: 48 83 c4 20 add $0x20,%rsp 25: 4c 89 e8 mov %r13,%rax 28: 5b pop %rbx 29: 5d pop %rbp * 2a: 41 5c pop %r12 <-- trapping instruction 2c: 41 5d pop %r13 2e: 41 5e pop %r14 30: 41 5f pop %r15 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: e8 a5 ac c7 f6 call 0xf6c7ace1 3c: 49 rex.WB 3d: 81 .byte 0x81 3e: fd std 3f: fd std