rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10505 ticks this GP) idle=d3dc/1/0x4000000000000000 softirq=482757/482758 fqs=5244
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1291313          0            0
rcu: 	cputime:    29239      23249           71   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=495977 q=2603 ncpus=2)
CPU: 1 UID: 0 PID: 10436 Comm: syz.4.28794 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+0x223/0x23c0
Code: 86 78 04 00 00 44 89 f8 4c 8d 2c 85 f0 c5 52 91 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 48 89 eb 0f 85 25 1c 00 00 45 8b 6d 00 <44> 89 f8 ff c0 48 8d 2c 85 f0 c5 52 91 48 89 e8 48 c1 e8 03 0f b6
RSP: 0018:ffffc90000a07998 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000500
RDX: 00000000000ab29c RSI: ffffffff8c27c9e0 RDI: ffffffff8c27c9a0
RBP: dffffc0000000000 R08: ffffffff81767e95 R09: ffffffff8e75e5e0
R10: ffffc90000a07ab8 R11: ffffffff81b0c390 R12: ffffffff8a78cc0f
R13: 00000000001a24fc R14: ffffc90000a07a68 R15: 00000000000978cc
FS:  00007f2450df56c0(0000) GS:ffff8882a945a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000004e6000 CR3: 000000010991a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0xee/0x890
 __dev_queue_xmit+0x487/0x3890
 br_dev_queue_push_xmit+0x370/0x4a0
 NF_HOOK+0x360/0x3f0
 br_forward_finish+0xd3/0x130
 NF_HOOK+0x360/0x3f0
 __br_forward+0x397/0x540
 br_dev_xmit+0x12bd/0x1980
 dev_hard_start_xmit+0x2d8/0x870
 __dev_queue_xmit+0x16d1/0x3890
 ip6_output+0x340/0x550
 ndisc_send_skb+0xd0b/0x1670
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:set_ptes+0x49/0x240
Code: 1d b0 ff e9 f3 01 00 00 e8 b4 1d b0 ff 48 b9 00 00 00 00 00 fc ff df 4c 89 24 24 4c 8b 34 24 48 89 d8 48 c1 e8 03 80 3c 08 00 <74> 08 48 89 df e8 3d 83 1a 00 4c 89 33 41 8d 77 ff 31 ff e8 bf 21
RSP: 0018:ffffc90003eaf2a0 EFLAGS: 00000246
RAX: 1ffff11032f2ece6 RBX: ffff888197976730 RCX: dffffc0000000000
RDX: 0000000000000005 RSI: ffffffff8e169d5a RDI: ffff888160a98000
RBP: dffffc0000000000 R08: ffff888100cfa27f R09: 1ffff1102019f44f
R10: dffffc0000000000 R11: ffffed102019f450 R12: 0000000013207225
R13: ffff888012c88000 R14: 0000000013207225 R15: 0000000000000001
 do_pte_missing+0x2ba0/0x3490
 handle_mm_fault+0x1bec/0x3310
 do_user_addr_fault+0x75b/0x1340
 exc_page_fault+0x6a/0xc0
 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 47 04 00 48 8d 0c c8 eb 86 cc cc
RSP: 0018:ffffc90003eaf798 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8881769e8000 RCX: 0000000000000428
RDX: 0000000000000001 RSI: 00002000004e6000 RDI: ffff8881769edec0
RBP: ffffc90003eaf8f0 R08: ffff8881769effff R09: 1ffff1102ed3dfff
R10: dffffc0000000000 R11: ffffed102ed3e000 R12: ffffc90003eafbb8
R13: 00002000004e0140 R14: 0000000000008000 R15: 1ffff920007d5f77
 _copy_from_iter+0x21b/0x1670
 kcm_sendmsg+0xe0c/0x2b60
 sock_write_iter+0x49b/0x4f0
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f244ff9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2450df5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2450215fa0 RCX: 00007f244ff9c799
RDX: 00000000fffffdef RSI: 0000200000000140 RDI: 0000000000000006
RBP: 00007f2450032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2450216038 R14: 00007f2450215fa0 R15: 00007ffdd17798a8
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 104693033940 wd_nsec: 104693041828
