rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P28930
	(detected by 1, t=10503 jiffies, g=459633, q=643)
syz-executor.0  R  running task    28480 28930   7036 0x00004006
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5956 [inline]
 sched_show_task.cold+0x2e2/0x343 kernel/sched/core.c:5931
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:190 [inline]
 print_other_cpu_stall kernel/rcu/tree_stall.h:418 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:558 [inline]
 rcu_pending kernel/rcu/tree.c:3225 [inline]
 rcu_sched_clock_irq.cold+0xca8/0xcfa kernel/rcu/tree.c:2296
 update_process_times+0x25/0x60 kernel/time/timer.c:1727
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x4e/0x140 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x5ca/0xed0 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline]
 smp_apic_timer_interrupt+0x15b/0x600 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:sctp_v6_cmp_addr+0x9a/0xd0 net/sctp/ipv6.c:609
Code: c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 04 84 d2 75 3c 0f b7 5b 02 89 ef 89 de e8 7b 5a 27 fa 66 39 dd 74 10 <e8> a1 59 27 fa 45 31 e4 5b 44 89 e0 5d 41 5c c3 e8 91 59 27 fa 41
RSP: 0018:ffffc90001957a38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000002 RBX: ffffc90001957af0 RCX: ffffffff874bd596
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff88804beeb620 R08: ffff888061376400 R09: ffffed100bfafa68
R10: ffff88805fd7d33b R11: ffffed100bfafa67 R12: 0000000000000000
R13: ffff88804fcba098 R14: ffffffff8a73b5e0 R15: 0000000000000001
 sctp_bind_addr_state+0x103/0x1d0 net/sctp/bind_addr.c:404
 sctp_copy_local_addr_list+0x255/0x530 net/sctp/protocol.c:161
 sctp_copy_one_addr+0x5b/0x170 net/sctp/bind_addr.c:457
 sctp_bind_addr_copy+0xfc/0x2ca net/sctp/bind_addr.c:56
 sctp_connect_new_asoc+0x16c/0x580 net/sctp/socket.c:1088
 __sctp_connect+0x430/0xc70 net/sctp/socket.c:1190
 sctp_connect net/sctp/socket.c:4908 [inline]
 sctp_inet_connect+0x14b/0x1b0 net/sctp/socket.c:4923
 __sys_connect_file+0x155/0x1a0 net/socket.c:1859
 __sys_connect+0x160/0x190 net/socket.c:1876
 __do_sys_connect net/socket.c:1887 [inline]
 __se_sys_connect net/socket.c:1884 [inline]
 __x64_sys_connect+0x6f/0xb0 net/socket.c:1884
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c829
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0f32cbbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00000000004dace0 RCX: 000000000045c829
RDX: 000000000000001c RSI: 0000000020d83fe4 RDI: 0000000000000003
RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000084 R14: 00000000004c31c2 R15: 00007f0f32cbc6d4