rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=bb0c/1/0x4000000000000000 softirq=48033/48034 fqs=4607
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1033853          0            0
rcu: 	cputime:    31233      21246           92   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=34505 q=2376 ncpus=2)
CPU: 0 UID: 0 PID: 11974 Comm: syz.2.1765 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:unwind_next_frame+0x19c1/0x2390
Code: ac 2a 00 48 c7 c7 a0 9e 13 8e 4c 89 fe e8 f7 91 2a 00 e8 72 3c 34 00 89 d8 48 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> cc cc cc cc cc 4c 8b 7c 24 48 eb 89 49 89 f7 48 89 f5 48 89 d8
RSP: 0018:ffffc90000007560 EFLAGS: 00000296
RAX: 0000000090c36c01 RBX: ffffc90000007620 RCX: fd2ad45edcbfa600
RDX: 0000000000000003 RSI: ffffffff8dba5d03 RDI: ffff888022d23980
RBP: ffffc900000075f0 R08: ffffc900074a7768 R09: 0000000000000000
R10: ffffc900000075b8 R11: fffff52000000eb9 R12: ffff888022d23980
R13: dffffc0000000000 R14: ffffffff81ac3930 R15: ffffc90000007568
FS:  00007fa20b1ba6c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33e1aff8 CR3: 000000001feee000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 __kfence_alloc+0x2b2/0x3b0
 kmem_cache_alloc_node_noprof+0x315/0x3c0
 __alloc_skb+0x112/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x369/0x670
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__local_bh_enable_ip+0x135/0x1c0
Code: 8b e8 9f 7a f4 09 65 66 8b 05 4f 58 1b 11 66 85 c0 75 5a bf 01 00 00 00 e8 58 15 0b 00 e8 e3 6d 42 00 fb 65 8b 05 2b 58 1b 11 <85> c0 75 05 e8 e2 de ae ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc900074a7480 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 0000000000000201 RCX: fd2ad45edcbfa600
RDX: 0000000000000006 RSI: ffffffff8d9b6a7d RDI: ffffffff8be33300
RBP: ffffc900074a7508 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffffffff8b62520f
R13: ffff888036186000 R14: dffffc0000000000 R15: 1ffff92000e94e90
 __mptcp_close_ssk+0x25f/0xfd0
 mptcp_destroy_common+0x152/0x320
 mptcp_disconnect+0x23d/0x700
 __inet_stream_connect+0x6be/0xe80
 mptcp_sendmsg_fastopen+0x2a5/0x580
 mptcp_sendmsg+0x176c/0x1970
 __sock_sendmsg+0xe5/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa20a38eba9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa20b1ba038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa20a5d5fa0 RCX: 00007fa20a38eba9
RDX: e07e872420dfef8a RSI: 0000200000000b00 RDI: 0000000000000008
RBP: 00007fa20a411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa20a5d6038 R14: 00007fa20a5d5fa0 R15: 00007ffc4b54eea8
 </TASK>
sched: DL replenish lagged too much
