watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.1:2793] Modules linked in: irq event stamp: 3750991 hardirqs last enabled at (3750990): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3750991): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (42): [] netlink_create+0x3c2/0x5e0 net/netlink/af_netlink.c:712 softirqs last disabled at (169): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (169): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 2793 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:86 [inline] RIP: 0010:do_raw_spin_lock+0xd7/0x220 kernel/locking/spinlock_debug.c:113 Code: 55 08 65 8b 05 8a a2 b5 7e 39 c2 0f 84 84 00 00 00 be 04 00 00 00 48 89 ef e8 35 70 4c 00 31 c0 ba 01 00 00 00 f0 0f b1 55 00 <85> c0 75 7b 65 8b 1d 5e a2 b5 7e 48 b8 00 00 00 00 00 fc ff df 4c RSP: 0018:ffff8880ba007cc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8880222fa810 RCX: ffffffff814bdebb RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff8880222fa858 RBP: ffff8880222fa858 R08: 0000000000000001 R09: ffffed100445f50b R10: ffff8880222fa85b R11: 0000000000000000 R12: ffff8880222fa860 R13: ffff8880222fa868 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f8b02afe700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000380 CR3: 000000004334b000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_lock include/linux/spinlock.h:329 [inline] garp_join_timer+0x20/0xf0 net/802/garp.c:421 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: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:ffff888232eafa10 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff888037566bc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880ba02b0c0 R14: ffff888037566400 R15: ffff888037566bc8 try_to_wake_up+0x733/0x1050 kernel/sched/core.c:2056 wake_up_process kernel/sched/core.c:2124 [inline] wake_up_q+0x82/0xe0 kernel/sched/core.c:442 futex_wake+0x3e3/0x480 kernel/futex.c:1706 do_futex+0x2ca/0x1880 kernel/futex.c:3894 __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: 0033:0x7f8b041890e9 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:00007f8b02afe218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f8b0429bf68 RCX: 00007f8b041890e9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f8b0429bf6c RBP: 00007f8b0429bf60 R08: 0000011c3290a82d R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f8b0429bf6c R13: 00007ffe8d83314f R14: 00007f8b02afe300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2815 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_irq_exit+0xc3/0x100 kernel/rcu/tree.c:839 Code: fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 48 8b 83 50 08 00 00 85 c0 74 09 80 3d fd ba bc 09 00 74 06 5b b8 fd ff ff 48 c7 c7 a0 64 6b 88 c6 05 e7 ba bc 09 01 e8 3a cd RSP: 0018:ffff8880ba107c18 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff8880ba11e2c0 RCX: 0000000000000001 RDX: 1ffff110465cb90a RSI: ffffffff83771e31 RDI: ffff888232e5c850 RBP: 0000000000000000 R08: ffffffff8c665058 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66505b R12: ffff888232ee7538 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f8b02add700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001600 CR3: 000000004334b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: irq_exit+0xb7/0x260 kernel/softirq.c:415 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:mod_timer+0x0/0x1010 kernel/time/timer.c:1113 Code: e8 b5 c4 0e 00 4c 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 c7 c7 80 d9 e0 89 e8 8b a1 44 00 e9 6e ff ff ff 66 0f 1f 44 00 00 <41> 57 41 56 41 55 41 54 49 bc 00 00 00 00 00 fc ff df 55 48 89 fd RSP: 0018:ffff8880ba107d20 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000011 RBX: ffff888093564290 RCX: dffffc0000000000 RDX: 1ffffffff13c1b30 RSI: 00000001000143c2 RDI: ffff888093564290 RBP: 0000000000000101 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880ba107d58 R13: 1ffff11017420fa7 R14: 0000000000000000 R15: 0000000000000000 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+0xc4/0x150 kernel/sched/core.c:3267 Code: 00 00 8b 15 ce 89 f5 0b 85 d2 75 bd 48 c7 c6 80 ba 69 88 48 c7 c7 c0 ba 69 88 e8 cc 4f b1 06 0f 0b 5b c3 65 8b 05 bc 71 c0 7e <84> c0 75 8b e8 53 e4 31 02 85 c0 74 92 48 c7 c0 40 f7 36 8d 48 ba RSP: 0018:ffff888232ee75e8 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000080000001 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffff888232ee7588 RDI: 0000000000000001 RBP: ffff888232ee7df8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff888232ee7787 R11: 0000000000074071 R12: ffff888232ee0000 R13: ffff888232ee775d R14: ffff888232ee7728 R15: ffffffff8b90fb0e 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 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc+0x110/0x370 mm/slab.c:3557 kmem_cache_zalloc include/linux/slab.h:699 [inline] fill_pool lib/debugobjects.c:134 [inline] __debug_object_init+0x6d9/0x9b0 lib/debugobjects.c:379 debug_hrtimer_init kernel/time/hrtimer.c:410 [inline] debug_init kernel/time/hrtimer.c:458 [inline] hrtimer_init+0x27/0x2f0 kernel/time/hrtimer.c:1375 init_dl_inactive_task_timer+0x1a/0x50 kernel/sched/deadline.c:1328 __sched_fork+0x215/0x470 kernel/sched/core.c:2162 sched_fork+0x16/0xb70 kernel/sched/core.c:2297 copy_process.part.0+0x1884/0x8260 kernel/fork.c:1883 copy_process kernel/fork.c:1710 [inline] _do_fork+0x22f/0xf30 kernel/fork.c:2219 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8b041890e9 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:00007f8b02add118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f8b0429c030 RCX: 00007f8b041890e9 RDX: 0000000020000200 RSI: 00000000200001c0 RDI: 0000000000004000 RBP: 00007f8b041e308d R08: 0000000020000400 R09: 0000000020000400 R10: 0000000020000240 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffe8d83314f R14: 00007f8b02add300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 55 push %rbp 1: 08 65 8b or %ah,-0x75(%rbp) 4: 05 8a a2 b5 7e add $0x7eb5a28a,%eax 9: 39 c2 cmp %eax,%edx b: 0f 84 84 00 00 00 je 0x95 11: be 04 00 00 00 mov $0x4,%esi 16: 48 89 ef mov %rbp,%rdi 19: e8 35 70 4c 00 callq 0x4c7053 1e: 31 c0 xor %eax,%eax 20: ba 01 00 00 00 mov $0x1,%edx 25: f0 0f b1 55 00 lock cmpxchg %edx,0x0(%rbp) * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 75 7b jne 0xa9 2e: 65 8b 1d 5e a2 b5 7e mov %gs:0x7eb5a25e(%rip),%ebx # 0x7eb5a293 35: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3c: fc ff df 3f: 4c rex.WR