watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor2:3287] Modules linked in: irq event stamp: 53400307 hardirqs last enabled at (53400306): [] slab_alloc_node mm/slab.c:3322 [inline] hardirqs last enabled at (53400306): [] kmem_cache_alloc_node_trace+0x22e/0x760 mm/slab.c:3654 hardirqs last disabled at (53400307): [] apic_timer_interrupt+0x98/0xb0 arch/x86/entry/entry_64.S:791 softirqs last enabled at (23438536): [] __do_softirq+0x733/0xbb2 kernel/softirq.c:311 softirqs last disabled at (23439497): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (23439497): [] irq_exit+0x1d3/0x210 kernel/softirq.c:405 CPU: 0 PID: 3287 Comm: syz-executor2 Not tainted 4.14.0+ #126 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801c5ca6240 task.stack: ffff8801c5b30000 RIP: 0010:update_stack_state+0x241/0x700 arch/x86/kernel/unwind_frame.c:208 RSP: 0018:ffff8801db406a38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11 RAX: 0000000000000001 RBX: ffff8801c5b37800 RCX: 1ffff1003b680d00 RDX: dffffc0000000000 RSI: ffff8801c5b37810 RDI: ffff8801db406cb8 RBP: ffff8801db406b40 R08: ffff8801db406cb0 R09: ffff8801c5ca6240 R10: 000000000000000b R11: ffffed003b680d98 R12: 1ffff1003b680d4f R13: ffff8801db406c60 R14: ffffffff814b1443 R15: ffff8801db406c70 FS: 0000000002792940(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000b58 CR3: 00000001c9e99000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame.part.6+0x1a6/0xb40 arch/x86/kernel/unwind_frame.c:329 unwind_next_frame+0x3e/0x50 arch/x86/kernel/unwind_frame.c:287 __save_stack_trace+0x6e/0xd0 arch/x86/kernel/stacktrace.c:44 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 kmem_cache_alloc_node_trace+0x150/0x760 mm/slab.c:3656 __do_kmalloc_node mm/slab.c:3674 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3689 __kmalloc_reserve.isra.41+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:981 [inline] _sctp_make_chunk+0x3b/0x260 net/sctp/sm_make_chunk.c:1383 sctp_make_control+0x39/0x150 net/sctp/sm_make_chunk.c:1424 sctp_make_heartbeat+0x88/0x400 net/sctp/sm_make_chunk.c:1148 sctp_sf_heartbeat.isra.15+0x26/0x180 net/sctp/sm_statefuns.c:970 sctp_sf_sendbeat_8_3+0x36b/0x520 net/sctp/sm_statefuns.c:1014 sctp_do_sm+0x18a/0x6a30 net/sctp/sm_sideeffect.c:1190 sctp_generate_heartbeat_event+0x295/0x3f0 net/sctp/sm_sideeffect.c:406 call_timer_fn+0x246/0x850 kernel/time/timer.c:1312 expire_timers kernel/time/timer.c:1351 [inline] __run_timers+0x7fd/0xb90 kernel/time/timer.c:1654 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1680 __do_softirq+0x29d/0xbb2 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1d3/0x210 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:540 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:791 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:787 [inline] RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:199 RSP: 0018:ffff8801c5b377f8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11 RAX: dffffc0000000000 RBX: ffff8801db425b40 RCX: 0000000000000000 RDX: 1ffffffff0bd96ab RSI: 0000000000000001 RDI: ffffffff85ecb558 RBP: ffff8801c5b37800 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c5ec0000 R13: 1ffff10038b66f08 R14: ffff8801c5ca6240 R15: ffff8801c5ca6240 finish_lock_switch kernel/sched/sched.h:1369 [inline] finish_task_switch+0x1d3/0x740 kernel/sched/core.c:2666 context_switch kernel/sched/core.c:2802 [inline] __schedule+0x8f3/0x2060 kernel/sched/core.c:3375 schedule+0xf5/0x430 kernel/sched/core.c:3434 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x224/0x6e0 kernel/time/hrtimer.c:1471 hrtimer_nanosleep+0x2b2/0x860 kernel/time/hrtimer.c:1525 SYSC_nanosleep kernel/time/hrtimer.c:1557 [inline] SyS_nanosleep+0x175/0x1f0 kernel/time/hrtimer.c:1544 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x47dec0 RSP: 002b:0000000000a6fa08 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 0000000002792914 RCX: 000000000047dec0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a6fa10 RBP: 0000000000000086 R08: 0000000000000001 R09: 0000000002792940 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000683e R13: 0000000000000024 R14: 0000000000177c2d R15: 0000000000000016 Code: 03 00 00 49 8b 7f 18 4c 89 fa e8 2b e2 f5 ff 85 c0 0f 84 45 ff ff ff 31 c0 48 ba 00 00 00 00 00 fc ff df 49 c7 04 14 00 00 00 00 <4a> c7 44 22 08 00 00 00 00 42 c7 44 22 10 00 00 00 00 48 81 c4