watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:19366] Modules linked in: irq event stamp: 2470447 hardirqs last enabled at (2470446): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2470447): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1098): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3921): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3921): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 19366 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count_sub+0x8/0x150 kernel/sched/core.c:3257 Code: e9 0f fc ff ff 89 4d d0 e8 15 f5 56 00 8b 4d d0 e9 88 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 c7 c0 60 37 24 8d 53 <89> fb 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 RSP: 0018:ffff8880ba007798 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffffffff8d243760 RBX: 1ffff11017400efe RCX: 0000000000000001 RDX: ffff8880ba007df8 RSI: ffff8880ba007738 RDI: 0000000000000001 RBP: ffff8880ba007df0 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba007937 R11: 0000000000074071 R12: ffff8880ba000000 R13: ffff8880ba00790d R14: ffff8880ba0078d8 R15: ffffffff8b93e8c0 FS: 0000555556ec1400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f524bd8e718 CR3: 0000000096e49000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xeee/0x1400 arch/x86/kernel/unwind_orc.c:579 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] mrp_pdu_init net/802/mrp.c:316 [inline] mrp_pdu_append_vecattr_event+0x7d2/0x1050 net/802/mrp.c:415 mrp_attr_event+0x15d/0x220 net/802/mrp.c:510 mrp_mad_event net/802/mrp.c:590 [inline] mrp_join_timer+0x5a/0xc0 net/802/mrp.c:607 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:preempt_count_sub+0x37/0x150 kernel/sched/core.c:3262 Code: 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 ef 00 00 00 8b 0d 59 ca e2 0b <85> c9 75 18 65 8b 05 3e 72 c0 7e 25 ff ff ff 7f 39 c3 7f 1a 81 fb RSP: 0018:ffff8880181779c0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff8880ba024cc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888018177b60 R13: ffffc90000c72380 R14: 1ffff1100302ef3e R15: ffff8880996ea180 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0x66/0xe0 kernel/locking/spinlock.c:184 hrtimer_start_expires include/linux/hrtimer.h:412 [inline] futex_wait_queue_me+0x254/0x5e0 kernel/futex.c:2709 futex_wait+0x1ef/0x610 kernel/futex.c:2837 do_futex+0x268/0x1880 kernel/futex.c:3889 __do_sys_futex kernel/futex.c:3950 [inline] __se_sys_futex+0x28f/0x3b0 kernel/futex.c:3918 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f524d47c049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeaa70aea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f524d58ef6c RCX: 00007f524d47c049 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f524d58ef6c RBP: 00007f524d58ef60 R08: 0000037eaecf090c R09: 0000000000000000 R10: 00007ffeaa70af90 R11: 0000000000000246 R12: 0000000000354093 R13: 00007ffeaa70af90 R14: 00007ffeaa70afb0 R15: 0000000000000032 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 19368 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_preemption_disabled+0x3c/0x280 lib/smp_processor_id.c:51 Code: 67 eb fd 65 44 8b 25 23 63 8a 7c 65 8b 1d 3c c1 8a 7c 81 e3 ff ff ff 7f 31 ff 89 de e8 bd 68 eb fd 85 db 74 18 e8 44 67 eb fd 3f 67 eb fd 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 2c 67 RSP: 0018:ffff8880ba107b58 EFLAGS: 00000006 RAX: ffff8880b144a1c0 RBX: 0000000000010103 RCX: ffffffff83771e23 RDX: 0000000000010100 RSI: ffffffff83771e2c RDI: 0000000000000005 RBP: ffffffff88b3e120 R08: ffffffff8c665058 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66505b R12: 0000000000000001 R13: ffffffff88b3e0e0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f524bdf1700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f524bdf0d38 CR3: 0000000096e49000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_lock_sched_held+0xc6/0x1d0 kernel/rcu/update.c:113 trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:56 [inline] smp_apic_timer_interrupt+0x3ca/0x550 arch/x86/kernel/apic/apic.c:1097 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 88 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 2f 48 83 3d 7c 31 d8 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb b2 e8 fb eb e6 f8 eb c0 0f 0b 0f 0b 48 c7 c7 88 RSP: 0018:ffff8880ba107cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: 0000000000000286 RCX: 1ffff11016289552 RDX: dffffc0000000000 RSI: ffff8880b144aa70 RDI: 0000000000000286 RBP: ffff8880a45eb968 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880a45eb968 R14: 0000000000000000 R15: 0000000000000000 spin_unlock_irqrestore include/linux/spinlock.h:384 [inline] skb_dequeue+0x125/0x180 net/core/skbuff.c:2839 garp_queue_xmit net/802/garp.c:274 [inline] garp_join_timer+0xc3/0xf0 net/802/garp.c:426 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:snd_ctl_find_id+0x13d/0x3f0 sound/core/control.c:712 Code: 49 8d 7c 24 14 48 89 f8 48 c1 e8 03 0f b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c 02 00 00 45 8b 74 24 14 <44> 89 ee 44 89 f7 e8 08 7d 1d fb 45 39 ee 0f 85 c7 01 00 00 e8 0a RSP: 0018:ffff88802d817910 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: dffffc0000000000 RCX: ffffffff86450958 RDX: 0000000000000000 RSI: ffffffff86450923 RDI: ffff8880a508b614 RBP: ffff88802d817ad0 R08: ffffffff8cd54258 R09: 0000000000000002 R10: 0000000000000004 R11: 0000000000000000 R12: ffff8880a508b600 R13: 0000000000000004 R14: 0000000000000002 R15: 1ffff11005b02f5b snd_ctl_remove_user_ctl+0x5f/0x230 sound/core/control.c:561 snd_ctl_elem_add+0xc5b/0x1380 sound/core/control.c:1278 snd_ctl_elem_add_user+0xb6/0x170 sound/core/control.c:1402 snd_ctl_ioctl+0x3bf/0xf50 sound/core/control.c:1581 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f524d47c049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f524bdf1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f524d58ef60 RCX: 00007f524d47c049 RDX: 0000000020000400 RSI: 00000000c1105518 RDI: 000000000000000f RBP: 00007f524d4d608d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeaa70ae2f R14: 00007f524bdf1300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: e9 0f fc ff ff jmpq 0xfffffc14 5: 89 4d d0 mov %ecx,-0x30(%rbp) 8: e8 15 f5 56 00 callq 0x56f522 d: 8b 4d d0 mov -0x30(%rbp),%ecx 10: e9 88 fe ff ff jmpq 0xfffffe9d 15: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 1c: 00 00 00 00 20: 66 90 xchg %ax,%ax 22: 48 c7 c0 60 37 24 8d mov $0xffffffff8d243760,%rax 29: 53 push %rbx * 2a: 89 fb mov %edi,%ebx <-- trapping instruction 2c: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 33: fc ff df 36: 48 89 c1 mov %rax,%rcx 39: 83 e0 07 and $0x7,%eax 3c: 48 c1 e9 03 shr $0x3,%rcx