================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.1/14002 [HC1[1]:SC1[1]:HE0:SE0] takes: ffff888029c7b148 (&timer->lock){?.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff888029c7b148 (&timer->lock){?.+.}-{2:2}, at: class_spinlock_constructor include/linux/spinlock.h:561 [inline] ffff888029c7b148 (&timer->lock){?.+.}-{2:2}, at: snd_hrtimer_callback+0x4d/0x420 sound/core/hrtimer.c:38 {HARDIRQ-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+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: 317 hardirqs last enabled at (316): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (316): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (317): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1043 softirqs last enabled at (0): [] copy_process+0x24cc/0x9160 kernel/fork.c:2335 softirqs last disabled at (313): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (313): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (313): [] 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 syz-executor.1/14002: #0: ffffc90000a08cb0 ((&q->adapt_timer)#2){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 #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: fq_pie_timer+0x5f/0x5a0 net/sched/sch_fq_pie.c:384 #2: ffff88807877a108 (&sch->q.lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff88807877a108 (&sch->q.lock){+.-.}-{2:2}, at: fq_pie_timer+0xfd/0x5a0 net/sched/sch_fq_pie.c:386 stack backtrace: CPU: 1 PID: 14002 Comm: syz-executor.1 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:4564 [inline] __lock_acquire+0x1359/0x3b30 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 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_hrtimer_callback+0x4d/0x420 sound/core/hrtimer.c:38 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xc20 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x29/0x60 kernel/kcov.c:207 Code: 90 f3 0f 1e fa 65 48 8b 15 04 db 76 7e 65 8b 05 05 db 76 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 14 16 00 00 <85> c0 74 2b 8b 82 f0 15 00 00 83 f8 02 75 20 48 8b 8a f8 15 00 00 RSP: 0018:ffffc90000a08b78 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 00000000abcc7711 RCX: ffffffff88e54286 RDX: ffff888067585a00 RSI: ffffffff88e542b6 RDI: 0000000000000007 RBP: ffff88807877a300 R08: 0000000000000007 R09: 00028f5c28f5c28e R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000064 R13: 0000000000000005 R14: 00000000112e0be8 R15: 0000000000000000 pie_calculate_probability+0x266/0x850 net/sched/sch_pie.c:347 fq_pie_timer+0x215/0x5a0 net/sched/sch_fq_pie.c:391 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 a6 3f 95 f6 48 89 df e8 0e bb 95 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 95 08 87 f6 65 8b 05 e6 d0 2d 75 85 c0 74 16 5b RSP: 0018:ffffc9000394f840 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff88801ae88c80 RCX: 1ffffffff1f3c599 RDX: 0000000000000000 RSI: ffffffff8b0cb740 RDI: ffffffff8b6e88a0 RBP: 0000000000000287 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8f9e6f97 R11: 0000000000000001 R12: ffff88801ae88c80 R13: 0000000000000000 R14: ffff88805c043c00 R15: ffff88801ae88c50 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] class_spinlock_irqsave_destructor include/linux/spinlock.h:574 [inline] snd_seq_timer_continue+0x221/0x2b0 sound/core/seq/seq_timer.c:395 snd_seq_queue_process_event sound/core/seq/seq_queue.c:643 [inline] snd_seq_control_queue+0x6a9/0x9c0 sound/core/seq/seq_queue.c:699 __snd_seq_deliver_single_event sound/core/seq/seq_clientmgr.c:638 [inline] __snd_seq_deliver_single_event+0x124/0x1c0 sound/core/seq/seq_clientmgr.c:625 snd_seq_deliver_single_event.constprop.0+0x5e6/0x6e0 sound/core/seq/seq_clientmgr.c:695 snd_seq_deliver_event+0x291/0x4b0 sound/core/seq/seq_clientmgr.c:818 snd_seq_kernel_client_dispatch+0x14d/0x180 sound/core/seq/seq_clientmgr.c:2496 send_timer_event.isra.0+0x12e/0x180 sound/core/seq/oss/seq_oss_timer.c:140 snd_seq_oss_timer_continue sound/core/seq/oss/seq_oss_timer.c:190 [inline] snd_seq_oss_timer_continue+0x7c/0xe0 sound/core/seq/oss/seq_oss_timer.c:186 timing_event sound/core/seq/oss/seq_oss_event.c:244 [inline] snd_seq_oss_process_event+0x3b4/0x2550 sound/core/seq/oss/seq_oss_event.c:55 insert_queue sound/core/seq/oss/seq_oss_rw.c:167 [inline] snd_seq_oss_write+0x234/0x7b0 sound/core/seq/oss/seq_oss_rw.c:135 odev_write+0x57/0xa0 sound/core/seq/oss/seq_oss.c:168 vfs_write+0x298/0x1100 fs/read_write.c:588 ksys_write+0x12f/0x260 fs/read_write.c:643 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: 0033:0x7f79b107de69 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:00007f79b1e9a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f79b11abf80 RCX: 00007f79b107de69 RDX: 0000000000000008 RSI: 0000000020000300 RDI: 0000000000000003 RBP: 00007f79b10ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f79b11abf80 R15: 00007ffc21461ba8 ---------------- Code disassembly (best guess): 0: 90 nop 1: f3 0f 1e fa endbr64 5: 65 48 8b 15 04 db 76 mov %gs:0x7e76db04(%rip),%rdx # 0x7e76db11 c: 7e d: 65 8b 05 05 db 76 7e mov %gs:0x7e76db05(%rip),%eax # 0x7e76db19 14: a9 00 01 ff 00 test $0xff0100,%eax 19: 48 8b 34 24 mov (%rsp),%rsi 1d: 74 0f je 0x2e 1f: f6 c4 01 test $0x1,%ah 22: 74 35 je 0x59 24: 8b 82 14 16 00 00 mov 0x1614(%rdx),%eax * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 74 2b je 0x59 2e: 8b 82 f0 15 00 00 mov 0x15f0(%rdx),%eax 34: 83 f8 02 cmp $0x2,%eax 37: 75 20 jne 0x59 39: 48 8b 8a f8 15 00 00 mov 0x15f8(%rdx),%rcx