================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. udevd/5240 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff88802a038148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff88802a038148 (&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_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: 354135 hardirqs last enabled at (354134): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (354134): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (354135): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (354135): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (353198): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (353198): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (354119): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (354119): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (354119): [] 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 udevd/5240: #0: ffff888074972420 (sb_writers#6){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:3885 #1: ffff8880243e82d0 (&type->i_mutex_dir_key#5/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:828 [inline] #1: ffff8880243e82d0 (&type->i_mutex_dir_key#5/1){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:3892 #2: ffff8880243e8078 (&simple_offset_lock_class){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff8880243e8078 (&simple_offset_lock_class){+.+.}-{2:2}, at: mtree_alloc_cyclic+0x13c/0x1d0 lib/maple_tree.c:6531 #3: ffffc90000007cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 0 PID: 5240 Comm: udevd 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:mas_wr_walk+0x0/0x1060 lib/maple_tree.c:3595 Code: 24 08 89 de 31 ff 0f b6 eb 41 89 dc 49 89 45 18 e8 75 88 ce f6 e9 6e f9 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <41> 57 41 56 41 55 41 54 55 53 48 83 ec 70 48 89 3c 24 e8 c9 8d ce RSP: 0018:ffffc9000414fa38 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 00000000fffffffe RCX: ffffffff8ac1f1ae RDX: ffff888021418000 RSI: ffffffff8ac1f1bc RDI: ffffc9000414faf0 RBP: 00000000000000e5 R08: 0000000000000005 R09: 0000000000000001 R10: 00000000fffffffe R11: 0000000000000002 R12: ffffc9000414fbf8 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc9000414faf0 mas_insert lib/maple_tree.c:4271 [inline] mas_alloc_cyclic+0x65c/0x1900 lib/maple_tree.c:4329 mtree_alloc_cyclic+0x161/0x1d0 lib/maple_tree.c:6532 simple_offset_add+0xc4/0x160 fs/libfs.c:289 shmem_symlink+0x1d4/0x6b0 mm/shmem.c:3522 vfs_symlink fs/namei.c:4484 [inline] vfs_symlink+0x3e8/0x630 fs/namei.c:4468 do_symlinkat+0x263/0x310 fs/namei.c:4510 __do_sys_symlink fs/namei.c:4531 [inline] __se_sys_symlink fs/namei.c:4529 [inline] __x64_sys_symlink+0x79/0xa0 fs/namei.c:4529 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: 0033:0x7fb077117ce7 Code: f0 ff ff 73 01 c3 48 8b 0d 3e 91 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 11 91 0d 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe1db3b818 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 00007ffe1db3b828 RCX: 00007fb077117ce7 RDX: 0000000000000000 RSI: 00007ffe1db3b828 RDI: 0000564027879380 RBP: 0000564027894d70 R08: 0000000000000000 R09: 00007ffe1db3b198 R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000000e7 R13: 00005640278abb30 R14: 0000000000000008 R15: 000056402786a2c0 vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: 24 08 and $0x8,%al 2: 89 de mov %ebx,%esi 4: 31 ff xor %edi,%edi 6: 0f b6 eb movzbl %bl,%ebp 9: 41 89 dc mov %ebx,%r12d c: 49 89 45 18 mov %rax,0x18(%r13) 10: e8 75 88 ce f6 call 0xf6ce888a 15: e9 6e f9 ff ff jmp 0xfffff988 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: 90 nop 29: 90 nop * 2a: 41 57 push %r15 <-- trapping instruction 2c: 41 56 push %r14 2e: 41 55 push %r13 30: 41 54 push %r12 32: 55 push %rbp 33: 53 push %rbx 34: 48 83 ec 70 sub $0x70,%rsp 38: 48 89 3c 24 mov %rdi,(%rsp) 3c: e8 .byte 0xe8 3d: c9 leave 3e: 8d (bad) 3f: ce (bad)