rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=0e54/1/0x4000000000000000 softirq=66883/66884 fqs=4819
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   980056          0            0
rcu: 	cputime:    28639      23839           94   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=63845 q=3067 ncpus=2)
CPU: 0 UID: 0 PID: 17706 Comm: syz.6.3615 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #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:ip6t_do_table+0x149/0x1560
Code: 4c 89 f8 48 c1 e8 03 48 89 84 24 b0 00 00 00 42 80 3c 28 00 74 08 4c 89 ff e8 a3 e2 e9 f7 4c 89 bc 24 b8 00 00 00 49 8b 46 10 <48> 8d 88 20 01 00 00 48 85 c0 48 0f 44 cb 48 89 4c 24 58 4c 89 b4
RSP: 0018:ffffc900000073e0 EFLAGS: 00000246
RAX: ffff88811ab1c000 RBX: ffffffff8ca14fa0 RCX: ffff88811ab1c120
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000007550
RBP: ffffc900000075d0 R08: ffffc9000000754f R09: 0000000000000000
R10: ffffc90000007530 R11: fffff52000000eaa R12: ffffc900000077c0
R13: dffffc0000000000 R14: ffffc900000077c0 R15: ffffc900000077d0
FS:  00007fcbd56a26c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000006d1000 CR3: 00000000377ba000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000082 DR2: 0000000000000082
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ip6table_mangle_hook+0x2a2/0x6c0
 nf_hook_slow+0xc5/0x220
 nf_hook+0x217/0x380
 ip6_output+0x27d/0x3e0
 ndisc_send_skb+0xb47/0x1400
 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:__sanitizer_cov_trace_pc+0x31/0x70
Code: 24 65 48 8b 0c 25 08 10 a0 92 65 8b 15 28 e7 df 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c <8b> 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48
RSP: 0018:ffffc90006e5f528 EFLAGS: 00000246
RAX: ffffffff820b3f68 RBX: 0000000000000000 RCX: ffff888133df5640
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff34039ac R12: 0000000000000000
R13: ffff888133df5640 R14: 0000000000000000 R15: 0000000000000000
 handle_mm_fault+0x668/0x8e0
 do_user_addr_fault+0x764/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x75/0x90
Code: 05 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01 c6 48 29 c1 48 89 c8 48 c1 e9 03 83 e0 07 <f3> 48 a5 89 c1 85 c9 75 91 e9 fd 00 04 00 48 8d 0c c8 eb 86 cc cc
RSP: 0018:ffffc90006e5f758 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888038e18000 RCX: 0000000000000e28
RDX: 0000000000000001 RSI: 00002000006d1000 RDI: ffff888038e18ec0
RBP: ffffc90006e5f8b0 R08: ffff888038e1ffff R09: 1ffff110071c3fff
R10: dffffc0000000000 R11: ffffed10071c4000 R12: 1ffff92000dcbf77
R13: 00002000006d0140 R14: ffffc90006e5fbc8 R15: 0000000000008000
 _copy_from_iter+0x24c/0x16f0
 kcm_sendmsg+0xeb2/0x2a70
 __sock_sendmsg+0x21c/0x270
 sock_write_iter+0x258/0x330
 vfs_write+0x54b/0xa90
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcbd478e9a9
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:00007fcbd56a2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fcbd49b6080 RCX: 00007fcbd478e9a9
RDX: 00000000fffffdef RSI: 0000200000000140 RDI: 000000000000000b
RBP: 00007fcbd4810d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fcbd49b6080 R15: 00007ffebde08568
 </TASK>
