INFO: rcu_preempt self-detected stall on CPU
	0-...: (1 GPs behind) idle=796/140000000000002/0 softirq=40769/40817 fqs=2 
	 (t=10500 jiffies g=11501 c=11500 q=1424)
rcu_preempt kthread starved for 10492 jiffies! g11501 c11500 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_preempt     R  running task    29392     8      2 0x80000000
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
NMI backtrace for cpu 0
CPU: 0 PID: 18588 Comm: syz-executor.4 Not tainted 4.14.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x13e/0x194 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline]
 rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:unwind_next_frame+0x51/0x17a0 arch/x86/kernel/unwind_orc.c:328
RSP: 0018:ffff8880aea06dd0 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8880aea06e80 RCX: 0000000000000001
RDX: ffffed1015d40dc1 RSI: ffffffff81838af2 RDI: ffff8880aea06e80
RBP: 1ffff11015d40dc1 R08: 0000000000000001 R09: ffff8880aea06ef8
R10: ffff8880aea06eb5 R11: 0000000000058071 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88809f0ae1c0 R15: ffff88805f08e2ff
 __save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
 kmem_cache_alloc+0x127/0x770 mm/slab.c:3552
 kmem_cache_zalloc include/linux/slab.h:651 [inline]
 fill_pool lib/debugobjects.c:110 [inline]
 __debug_object_init+0x5b7/0x830 lib/debugobjects.c:341
 debug_timer_init kernel/time/timer.c:687 [inline]
 debug_init kernel/time/timer.c:736 [inline]
 init_timer_key+0x2a/0x2f0 kernel/time/timer.c:780
 neigh_alloc net/core/neighbour.c:336 [inline]
 __neigh_create+0x452/0x1980 net/core/neighbour.c:499
 ip6_finish_output2+0xa8e/0x2150 net/ipv6/ip6_output.c:117
 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:462 [inline]
 NF_HOOK include/linux/netfilter.h:250 [inline]
 NF_HOOK include/linux/netfilter.h:244 [inline]
 ip6_xmit+0xd4c/0x1ea0 net/ipv6/ip6_output.c:275
 sctp_v6_xmit+0x35b/0x4f0 net/sctp/ipv6.c:224
 sctp_packet_transmit+0x17f7/0x2d70 net/sctp/output.c:637
 sctp_outq_flush+0xc54/0x2dd0 net/sctp/outqueue.c:1187
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1787 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline]
 sctp_do_sm+0x419/0x4a90 net/sctp/sm_sideeffect.c:1150
 sctp_generate_heartbeat_event+0x1da/0x3f0 net/sctp/sm_sideeffect.c:391
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611
RSP: 0018:ffff88808cf27b00 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2cd3 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88809f0aea3c
RBP: ffffed1013e15c38 R08: 000000484b261220 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809f0ae1c0
R13: ffffffff87d16698 R14: 0000000000000000 R15: 0000000000000000
 retint_kernel+0x1b/0x2d
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:rds_conn_path_state net/rds/rds.h:739 [inline]
RIP: 0010:rds_conn_path_connect_if_down+0x29/0xc0 net/rds/connection.c:708
RSP: 0018:ffff88808cf27bd8 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8880502accc0 RCX: ffffc9000cbad000
RDX: 0000000000000000 RSI: ffffffff85d524cd RDI: ffff8880502acd60
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880502accc0
R13: ffff88807be6ee1c R14: ffff88808d763b00 R15: ffff8880903c4e00
 rds_sendmsg+0xf8a/0x1be0 net/rds/send.c:1159
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xc5/0x100 net/socket.c:656
 SYSC_sendto+0x1c4/0x2b0 net/socket.c:1763
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c879
RSP: 002b:00007f0cc525dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f0cc525e6d4 RCX: 000000000045c879
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 000000000076bfa0 R08: 0000000020000040 R09: 0000000000000010
R10: 0000000000000040 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a06 R14: 00000000004ccbe6 R15: 000000000076bfac
INFO: rcu_sched detected stalls on CPUs/tasks:
	0-...: (1 GPs behind) idle=796/140000000000001/0 softirq=40769/40817 fqs=2 
	(detected by 1, t=10603 jiffies, g=5085, c=5084, q=4)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18588 Comm: syz-executor.4 Not tainted 4.14.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809f0ae1c0 task.stack: ffff88808cf20000
RIP: 0010:perf_swevent_hrtimer+0x233/0x350 kernel/events/core.c:8740
RSP: 0018:ffff8880aea06f80 EFLAGS: 00000006
RAX: ffff88809f0ae1c0 RBX: 1ffff11015d40df0 RCX: 0000000000000000
RDX: 0000000000010100 RSI: 00000000000000f6 RDI: 0000000000000001
RBP: ffff8880aea071d8 R08: 0000000000000001 R09: 0000000000000004
R10: ffff8880aea06e70 R11: ffff88809f0ae1c0 R12: ffff8880832056c8
R13: 0000000000000001 R14: ffff888083205580 R15: 0000000000000000
FS:  00007f0cc525e700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000071c914 CR3: 000000009314a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:ipt_do_table+0xbef/0x16d0 net/ipv4/netfilter/ip_tables.c:230
RSP: 0018:ffff8880aea07438 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: ffffed1015d40ea8 RBX: 0000000000000001 RCX: 1ffff11013e15d51
RDX: 0000000000000100 RSI: ffff88809f0aeab8 RDI: ffff88809f0aea3c
RBP: ffff888089b40e44 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809348e558
R13: ffffe8ffffcbe010 R14: dffffc0000000000 R15: ffff88809348e5c8
 iptable_raw_hook+0x176/0x1e0 net/ipv4/netfilter/iptable_raw.c:35
 nf_hook_entry_hookfn include/linux/netfilter.h:108 [inline]
 nf_hook_slow+0xa5/0x1a0 net/netfilter/core.c:467
 nf_hook include/linux/netfilter.h:205 [inline]
 __ip_local_out+0x358/0x730 net/ipv4/ip_output.c:113
 ip_local_out+0x25/0x170 net/ipv4/ip_output.c:122
 ip_queue_xmit+0x7b2/0x1b20 net/ipv4/ip_output.c:504
 sctp_packet_transmit+0x17f7/0x2d70 net/sctp/output.c:637
 sctp_outq_flush+0xc54/0x2dd0 net/sctp/outqueue.c:1187
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1787 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline]
 sctp_do_sm+0x419/0x4a90 net/sctp/sm_sideeffect.c:1150
 sctp_generate_heartbeat_event+0x1da/0x3f0 net/sctp/sm_sideeffect.c:391
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611
RSP: 0018:ffff88808cf27b00 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2cd3 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88809f0aea3c
RBP: ffffed1013e15c38 R08: 000000484b261220 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809f0ae1c0
R13: ffffffff87d16698 R14: 0000000000000000 R15: 0000000000000000
 retint_kernel+0x1b/0x2d
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:rds_conn_path_state net/rds/rds.h:739 [inline]
RIP: 0010:rds_conn_path_connect_if_down+0x29/0xc0 net/rds/connection.c:708
RSP: 0018:ffff88808cf27bd8 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8880502accc0 RCX: ffffc9000cbad000
RDX: 0000000000000000 RSI: ffffffff85d524cd RDI: ffff8880502acd60
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880502accc0
R13: ffff88807be6ee1c R14: ffff88808d763b00 R15: ffff8880903c4e00
 rds_sendmsg+0xf8a/0x1be0 net/rds/send.c:1159
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xc5/0x100 net/socket.c:656
 SYSC_sendto+0x1c4/0x2b0 net/socket.c:1763
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c879
RSP: 002b:00007f0cc525dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f0cc525e6d4 RCX: 000000000045c879
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 000000000076bfa0 R08: 0000000020000040 R09: 0000000000000010
R10: 0000000000000040 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a06 R14: 00000000004ccbe6 R15: 000000000076bfac
Code: 4c 89 e9 be 01 00 00 00 4c 89 f7 48 8d 54 24 40 45 31 ed e8 80 ee ff ff 85 c0 41 0f 94 c5 eb 06 41 bd 01 00 00 00 e8 cd f0 f1 ff <49> 8d bc 24 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 
rcu_sched kthread starved for 10596 jiffies! g5085 c5084 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_sched       R  running task    29920     9      2 0x80000000
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404