INFO: rcu_preempt self-detected stall on CPU
	1-...: (10499 ticks this GP) idle=a56/140000000000002/0 softirq=112486/112486 fqs=4571 
	 (t=10500 jiffies g=33536 c=33535 q=942)
NMI backtrace for cpu 1
CPU: 1 PID: 2758 Comm: syz-executor.3 Not tainted 4.14.177-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
snd_dummy snd_dummy.0: OSS sync error - DMA timeout
 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:orc_ip arch/x86/kernel/unwind_orc.c:27 [inline]
RIP: 0010:__orc_find+0x72/0xf0 arch/x86/kernel/unwind_orc.c:49
RSP: 0018:ffff8880aeb073c0 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff10
RAX: ffffffff88a345f4 RBX: ffffffff88a345f4 RCX: ffffffff818f512e
RDX: 0000000000000000 RSI: ffffffff88f2bba0 RDI: ffffffff88a345e0
RBP: ffffffff88a345f0 R08: ffffffff88f2bc06 R09: ffff88820a607ec0
R10: ffff8880aeb074ed R11: 0000000000058071 R12: ffffffff88a345fc
R13: ffffffff88a345e0 R14: ffffffff88a345ec R15: dffffc0000000000
 orc_find arch/x86/kernel/unwind_orc.c:121 [inline]
 unwind_next_frame+0x5de/0x17a0 arch/x86/kernel/unwind_orc.c:348
 __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
 slab_post_alloc_hook mm/slab.h:442 [inline]
 slab_alloc mm/slab.c:3390 [inline]
 kmem_cache_alloc+0x114/0x770 mm/slab.c:3550
 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_object_init lib/debugobjects.c:393 [inline]
 debug_object_activate+0x274/0x450 lib/debugobjects.c:474
 debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline]
 __call_rcu.constprop.0+0x31/0x7e0 kernel/rcu/tree.c:3050
 sctp_bind_addr_clean+0x113/0x1e0 net/sctp/bind_addr.c:140
 sctp_association_free+0x278/0x765 net/sctp/associola.c:375
 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:924 [inline]
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1312 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline]
 sctp_do_sm+0x3557/0x4a90 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:do_vfs_ioctl+0x0/0xfe0 fs/ioctl.c:627
RSP: 0018:ffff88820a607ec0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff10
RAX: 0000000000040000 RBX: 0000000000000000 RCX: 0000000020000080
RDX: 00000000c0045002 RSI: 0000000000000004 RDI: ffff88809810b280
RBP: 0000000000000004 R08: 0000000000000001 R09: 0000000000000000
R10: ffff88820a607e90 R11: 0000000000000000 R12: ffff88809810b281
R13: 00000000c0045002 R14: 0000000020000080 R15: ffff88809810b280
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c829
RSP: 002b:00007fd1d35b9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004ebc40 RCX: 000000000045c829
RDX: 0000000020000080 RSI: 00000000c0045002 RDI: 0000000000000004
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004c6 R14: 00000000004c79c8 R15: 00007fd1d35ba6d4
INFO: rcu_sched detected stalls on CPUs/tasks:
	1-...: (1 GPs behind) idle=a56/140000000000001/0 softirq=112475/112486 fqs=4572 
	(detected by 0, t=10559 jiffies, g=14004, c=14003, q=12)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7237 Comm: kworker/1:3 Not tainted 4.14.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_long br_fdb_cleanup
task: ffff888053a9a1c0 task.stack: ffff888053aa0000
RIP: 0010:sctp_inq_push+0x197/0x250 net/sctp/inqueue.c:95
RSP: 0018:ffff8880aeb07828 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff88808d659870 RCX: ffff88808ed6f800
RDX: 1ffff11010a1e7b2 RSI: ffff88808d659870 RDI: ffff8880850f3d90
RBP: 0000000000000000 R08: ffff88808d659860 R09: ffffffff8a071090
R10: ffff888053a9aae8 R11: ffff888053a9a1c0 R12: ffff88808d659870
R13: ffff88808d659878 R14: ffff88808ed6f888 R15: ffff88808d659840
FS:  0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ebc50 CR3: 000000005672f000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 sctp_rcv+0x2336/0x2e30 net/sctp/input.c:267
 ip_local_deliver_finish+0x245/0xaa0 net/ipv4/ip_input.c:216
 NF_HOOK include/linux/netfilter.h:250 [inline]
 NF_HOOK include/linux/netfilter.h:244 [inline]
 ip_local_deliver+0x1a6/0x450 net/ipv4/ip_input.c:257
 dst_input include/net/dst.h:468 [inline]
 ip_rcv_finish+0x79b/0x1a10 net/ipv4/ip_input.c:396
 NF_HOOK include/linux/netfilter.h:250 [inline]
 NF_HOOK include/linux/netfilter.h:244 [inline]
 ip_rcv+0x9d8/0xfec net/ipv4/ip_input.c:493
 __netif_receive_skb_core+0x1e50/0x2c00 net/core/dev.c:4478
 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4516
 process_backlog+0x214/0x750 net/core/dev.c:5198
 napi_poll net/core/dev.c:5599 [inline]
 net_rx_action+0x456/0xe90 net/core/dev.c:5665
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1015
 </IRQ>
 do_softirq.part.0+0x103/0x160 kernel/softirq.c:332
 do_softirq kernel/softirq.c:324 [inline]
 __local_bh_enable_ip+0x149/0x190 kernel/softirq.c:185
 spin_unlock_bh include/linux/spinlock.h:362 [inline]
 br_fdb_cleanup+0x242/0x350 net/bridge/br_fdb.c:345
 process_one_work+0x813/0x1540 kernel/workqueue.c:2116
 worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: fb 48 8d bd 90 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 84 00 00 00 48 83 85 90 09 00 00 01 <e8> d4 fd 8a fb 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 30 48 89