rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=a65/1/0x4000000000000000 softirq=256686/256686 fqs=5126 
	(t=10500 jiffies g=471989 q=1932)
NMI backtrace for cpu 0
CPU: 0 PID: 3784 Comm: syz-executor.0 Not tainted 5.15.0-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:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
 rcu_pending kernel/rcu/tree.c:3878 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x69/0x70 kernel/kcov.c:293
Code: 3c cd 28 00 00 00 48 39 fe 72 1f 48 83 c2 01 4c 89 44 38 e8 48 c7 44 38 e0 07 00 00 00 48 89 4c 38 f0 4e 89 54 c8 20 48 89 10 <c3> 66 0f 1f 44 00 00 49 89 f8 bf 03 00 00 00 4c 8b 14 24 48 89 f1
RSP: 0018:ffffc9001b5a79e8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880ad56ab20 RCX: 0d00000000000000
RDX: 0000000000000000 RSI: ffff8880a32d9d00 RDI: 0000000000000003
RBP: ffffc9001b5a7ad0 R08: 0000000000000000 R09: 000000000000000a
R10: ffffffff88612a2d R11: 000000000000000a R12: 0d00000000000000
R13: ffff8880ad56ab28 R14: 0000000000000000 R15: 0000000000000001
 __sctp_v6_cmp_addr+0x2ad/0x520 net/sctp/ipv6.c:644
 sctp_v6_cmp_addr+0x1a/0xd0 net/sctp/ipv6.c:662
 sctp_bind_addr_state+0x103/0x1d0 net/sctp/bind_addr.c:407
 sctp_copy_local_addr_list+0x1fe/0x4f0 net/sctp/protocol.c:163
 sctp_copy_one_addr net/sctp/bind_addr.c:460 [inline]
 sctp_bind_addr_copy+0xde/0x460 net/sctp/bind_addr.c:56
 sctp_connect_new_asoc+0x1cd/0x770 net/sctp/socket.c:1092
 __sctp_connect+0x3d0/0xc30 net/sctp/socket.c:1194
 sctp_connect net/sctp/socket.c:4808 [inline]
 sctp_inet_connect+0x15e/0x200 net/sctp/socket.c:4823
 __sys_connect_file+0x155/0x1a0 net/socket.c:1896
 __sys_connect+0x161/0x190 net/socket.c:1913
 __do_sys_connect net/socket.c:1923 [inline]
 __se_sys_connect net/socket.c:1920 [inline]
 __x64_sys_connect+0x6f/0xb0 net/socket.c:1920
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f307b1b4ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f307872a188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f307b2c7f60 RCX: 00007f307b1b4ae9
RDX: 000000000000001c RSI: 00000000200010c0 RDI: 0000000000000006
RBP: 00007f307b20ef25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc47ca6fcf R14: 00007f307872a300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	3c cd                	cmp    $0xcd,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 39 fe             	cmp    %rdi,%rsi
   9:	72 1f                	jb     0x2a
   b:	48 83 c2 01          	add    $0x1,%rdx
   f:	4c 89 44 38 e8       	mov    %r8,-0x18(%rax,%rdi,1)
  14:	48 c7 44 38 e0 07 00 	movq   $0x7,-0x20(%rax,%rdi,1)
  1b:	00 00
  1d:	48 89 4c 38 f0       	mov    %rcx,-0x10(%rax,%rdi,1)
  22:	4e 89 54 c8 20       	mov    %r10,0x20(%rax,%r9,8)
  27:	48 89 10             	mov    %rdx,(%rax)
* 2a:	c3                   	retq <-- trapping instruction
  2b:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
  31:	49 89 f8             	mov    %rdi,%r8
  34:	bf 03 00 00 00       	mov    $0x3,%edi
  39:	4c 8b 14 24          	mov    (%rsp),%r10
  3d:	48 89 f1             	mov    %rsi,%rcx