================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. kworker/u8:4/61 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029e4d148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029e4d148 (&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_timer_user_release+0x91/0x260 sound/core/timer.c:1468 __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: 20277037 hardirqs last enabled at (20277036): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:351 hardirqs last disabled at (20277037): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (20277037): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (20277028): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (20277028): [] batadv_nc_purge_paths+0x1d1/0x3c0 net/batman-adv/network-coding.c:471 softirqs last disabled at (20277031): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (20277031): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (20277031): [] 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 *** 3 locks held by kworker/u8:4/61: #0: ffff88802ae71948 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc900015c7d80 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffffc90000007cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 0 PID: 61 Comm: kworker/u8:4 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: bat_events batadv_nc_worker 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:__local_bh_enable_ip+0xac/0x120 kernel/softirq.c:389 Code: 1d 31 f1 b0 7e 65 8b 05 2a f1 b0 7e a9 00 ff ff 00 74 4d bf 01 00 00 00 e8 b1 6c 0b 00 e8 cc 68 42 00 fb 65 8b 05 0c f1 b0 7e <85> c0 74 52 5b 5d e9 d9 44 84 09 65 8b 05 4e a5 af 7e 85 c0 75 9e RSP: 0018:ffffc900015c7b08 EFLAGS: 00000202 RAX: 0000000080000000 RBX: 00000000fffffe00 RCX: 1ffffffff27c222f RDX: 0000000000000000 RSI: ffffffff8b0cc880 RDI: ffffffff8b6eb4e0 RBP: ffffffff8a98dcb1 R08: 0000000000000001 R09: fffffbfff27b784b R10: ffffffff93dbc25f R11: 0000000000000002 R12: ffffffff8a98e080 R13: ffff88801ee84ca0 R14: ffff88802bc32cc0 R15: 0000000000000000 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_nc_purge_paths+0x1d1/0x3c0 net/batman-adv/network-coding.c:471 batadv_nc_worker+0x9b1/0x10f0 net/batman-adv/network-coding.c:722 process_one_work+0x9ac/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c4/0x3a0 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 cm109 5-1:0.8: cm109_urb_ctl_callback: urb status -71 cm109 5-1:0.8: cm109_submit_buzz_toggle: usb_submit_urb (urb_ctl) failed -19 cm109 6-1:0.8: cm109_urb_irq_callback: urb status -71 cm109 6-1:0.8: cm109_urb_irq_callback: usb_submit_urb (urb_ctl) failed -19 ---------------- Code disassembly (best guess): 0: 1d 31 f1 b0 7e sbb $0x7eb0f131,%eax 5: 65 8b 05 2a f1 b0 7e mov %gs:0x7eb0f12a(%rip),%eax # 0x7eb0f136 c: a9 00 ff ff 00 test $0xffff00,%eax 11: 74 4d je 0x60 13: bf 01 00 00 00 mov $0x1,%edi 18: e8 b1 6c 0b 00 call 0xb6cce 1d: e8 cc 68 42 00 call 0x4268ee 22: fb sti 23: 65 8b 05 0c f1 b0 7e mov %gs:0x7eb0f10c(%rip),%eax # 0x7eb0f136 * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 74 52 je 0x80 2e: 5b pop %rbx 2f: 5d pop %rbp 30: e9 d9 44 84 09 jmp 0x984450e 35: 65 8b 05 4e a5 af 7e mov %gs:0x7eafa54e(%rip),%eax # 0x7eafa58a 3c: 85 c0 test %eax,%eax 3e: 75 9e jne 0xffffffde