INFO: rcu_sched self-detected stall on CPU 1-....: (109370 ticks this GP) idle=1fa/1/4611686018427387908 softirq=37355/37355 fqs=31033 (t=125000 jiffies g=19029 c=19028 q=83910) NMI backtrace for cpu 1 CPU: 1 PID: 14232 Comm: syz-executor5 Not tainted 4.16.0-rc2+ #328 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x122/0x180 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline] rcu_dump_cpu_stacks+0x186/0x1de kernel/rcu/tree.c:1375 print_cpu_stall kernel/rcu/tree.c:1524 [inline] check_cpu_stall.isra.61+0xbb8/0x15b0 kernel/rcu/tree.c:1592 __rcu_pending kernel/rcu/tree.c:3361 [inline] rcu_pending kernel/rcu/tree.c:3423 [inline] rcu_check_callbacks+0x238/0xd20 kernel/rcu/tree.c:2763 update_process_times+0x30/0x60 kernel/time/timer.c:1636 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1194 __run_hrtimer kernel/time/hrtimer.c:1349 [inline] __hrtimer_run_queues+0x39c/0xec0 kernel/time/hrtimer.c:1411 hrtimer_interrupt+0x2a5/0x6f0 kernel/time/hrtimer.c:1469 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050 apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:796 RIP: 0010:unwind_get_return_address+0x76/0xa0 arch/x86/kernel/unwind_frame.c:18 RSP: 0018:ffff8801db306200 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff12 RAX: dffffc0000000000 RBX: ffff8801db306220 RCX: 0000000000000001 RDX: 1ffff1003b660c4d RSI: ffff8801b58fef88 RDI: ffffffff8552d842 RBP: ffff8801db306210 R08: ffff8801db306260 R09: ffff8801b3da44c0 R10: 000000000000000b R11: ffffed003b660c4e R12: ffff8801db306268 R13: 0000000000000000 R14: ffff8801b3da44c0 R15: ffff8801dac00ac0 __save_stack_trace+0x7e/0xd0 arch/x86/kernel/stacktrace.c:45 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:552 __do_kmalloc_node mm/slab.c:3669 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3683 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:983 [inline] sctp_packet_transmit+0x2ed/0x3750 net/sctp/output.c:581 sctp_outq_flush+0x121b/0x4060 net/sctp/outqueue.c:1197 sctp_outq_uncork+0x5a/0x70 net/sctp/outqueue.c:776 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1807 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1210 [inline] sctp_do_sm+0x4e0/0x6ed0 net/sctp/sm_sideeffect.c:1181 sctp_generate_heartbeat_event+0x292/0x3f0 net/sctp/sm_sideeffect.c:406 call_timer_fn+0x228/0x820 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:541 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:796 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:42 [inline] RIP: 0010:update_stack_state+0x1bf/0x700 arch/x86/kernel/unwind_frame.c:238 RSP: 0018:ffff8801b58fe828 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 RAX: 0000000000000001 RBX: ffff8801b58fe980 RCX: 1ffff10036b1fd34 RDX: ffff8801b58f8000 RSI: ffff8801b58fe998 RDI: ffff8801b58fe9a0 RBP: ffff8801b58fe930 R08: ffffed0036b1fd3d R09: ffff8801b58fe990 R10: 000000000000000b R11: ffffed0036b1fd3c R12: 1ffff10036b1fd0d R13: ffffed0036b1fd33 R14: dffffc0000000000 R15: ffff8801b58fe990 __unwind_start+0xfd/0x330 arch/x86/kernel/unwind_frame.c:404 unwind_start arch/x86/include/asm/unwind.h:54 [inline] __save_stack_trace+0x4a/0xd0 arch/x86/kernel/stacktrace.c:43 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:552 __do_kmalloc_node mm/slab.c:3669 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3683 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:983 [inline] _sctp_make_chunk+0x51/0x270 net/sctp/sm_make_chunk.c:1390 sctp_make_control+0x39/0x150 net/sctp/sm_make_chunk.c:1437 sctp_make_heartbeat_ack+0x38/0x100 net/sctp/sm_make_chunk.c:1181 sctp_sf_beat_8_3+0x3f2/0x650 net/sctp/sm_statefuns.c:1123 sctp_do_sm+0x192/0x6ed0 net/sctp/sm_sideeffect.c:1178 sctp_assoc_bh_rcv+0x283/0x4b0 net/sctp/associola.c:1065 sctp_inq_push+0x23b/0x300 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x177/0xa90 net/sctp/input.c:350 sk_backlog_rcv include/net/sock.h:908 [inline] __release_sock+0x124/0x360 net/core/sock.c:2271 release_sock+0xa4/0x2a0 net/core/sock.c:2786 sctp_wait_for_connect+0x346/0x570 net/sctp/socket.c:8236 sctp_sendmsg+0x2b3d/0x35e0 net/sctp/socket.c:2043 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453de9 RSP: 002b:00007f1c797ffc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f1c798006d4 RCX: 0000000000453de9 RDX: 0000000000000001 RSI: 0000000020847fff RDI: 0000000000000017 RBP: 000000000072bf58 R08: 000000002005ffe4 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004ba R14: 00000000006f7210 R15: 0000000000000001