================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.4/8139 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029e5c148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029e5c148 (&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+0x10a/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+0x273/0xb80 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+0xd5/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 irq event stamp: 11295 hardirqs last enabled at (11294): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:351 hardirqs last disabled at (11295): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (11295): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (10184): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (10184): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (11271): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (11271): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (11271): [] 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 *** 5 locks held by syz-executor.4/8139: #0: ffff88802c8fe848 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xeb/0x180 fs/file.c:1191 #1: ffff888028fdc420 (sb_writers#4){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:643 #2: ffff8880443e3600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline] #2: ffff8880443e3600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3d0 fs/ext4/file.c:294 #3: ffff8880443e3a10 (&ei->i_es_lock){++++}-{2:2}, at: ext4_es_lookup_extent+0x171/0xc10 fs/ext4/extents_status.c:997 #4: ffffc90000007cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 0 PID: 8139 Comm: syz-executor.4 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+0x1a3/0x5b0 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+0x21b/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:percpu_counter_add_batch+0xe6/0x1f0 lib/percpu_counter.c:103 Code: e8 5f f7 e5 fc 48 85 db 75 42 e8 45 fc e5 fc 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 43 f7 e5 fc 48 85 db 0f 85 bd 00 00 00 <48> 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 17 fc e5 fc e8 12 fc RSP: 0018:ffffc90008f276c0 EFLAGS: 00000246 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90013c6c000 RDX: 0000000000040000 RSI: ffffffff84a84052 RDI: 0000000000000007 RBP: ffff888028fde780 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000003 R13: 0000000000000001 R14: 0000607f4681ce10 R15: 0000000000000020 percpu_counter_add include/linux/percpu_counter.h:71 [inline] percpu_counter_inc include/linux/percpu_counter.h:267 [inline] ext4_es_lookup_extent+0x8c2/0xc10 fs/ext4/extents_status.c:1031 ext4_da_map_blocks fs/ext4/inode.c:1707 [inline] ext4_da_get_block_prep+0x2ea/0x1360 fs/ext4/inode.c:1817 ext4_block_write_begin+0x3dd/0xef0 fs/ext4/inode.c:1055 ext4_da_write_begin+0x410/0x8c0 fs/ext4/inode.c:2894 generic_perform_write+0x275/0x620 mm/filemap.c:3930 ext4_buffered_write_iter+0x11f/0x3d0 fs/ext4/file.c:299 ext4_file_write_iter+0x874/0x1a40 fs/ext4/file.c:698 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6de/0x1100 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fa3b947de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa3ba2a10c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa3b95abf80 RCX: 00007fa3b947de69 RDX: 000000000208e24b RSI: 0000000020000100 RDI: 0000000000000008 RBP: 00007fa3b94ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa3b95abf80 R15: 00007ffe98c5cbb8 ---------------- Code disassembly (best guess): 0: e8 5f f7 e5 fc call 0xfce5f764 5: 48 85 db test %rbx,%rbx 8: 75 42 jne 0x4c a: e8 45 fc e5 fc call 0xfce5fc54 f: 9c pushf 10: 5b pop %rbx 11: 81 e3 00 02 00 00 and $0x200,%ebx 17: 31 ff xor %edi,%edi 19: 48 89 de mov %rbx,%rsi 1c: e8 43 f7 e5 fc call 0xfce5f764 21: 48 85 db test %rbx,%rbx 24: 0f 85 bd 00 00 00 jne 0xe7 * 2a: 48 83 c4 18 add $0x18,%rsp <-- trapping instruction 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: 41 5d pop %r13 34: 41 5e pop %r14 36: 41 5f pop %r15 38: e9 17 fc e5 fc jmp 0xfce5fc54 3d: e8 .byte 0xe8 3e: 12 fc adc %ah,%bh