rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (2857 ticks this GP) idle=f8dc/1/0x4000000000000000 softirq=74083/74084 fqs=5179
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   695937          7            0
rcu: 	cputime:    17285      11264           41   ==> 28550(ms)
rcu: 	(t=10502 jiffies g=67705 q=6805 ncpus=2)
CPU: 0 UID: 0 PID: 19085 Comm: syz.4.3295 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:get_stack_info+0xbf/0xf0
Code: 92 15 fe 8d e8 e2 73 be ff eb cd be 01 00 00 00 48 c7 c7 40 bb 57 8e 4c 89 e2 e8 5c 65 82 03 31 c0 4d 0f a3 e5 72 9b 45 8b 36 <49> 83 fe 40 73 10 ba 01 00 00 00 44 89 f1 48 d3 e2 48 09 13 eb a4
RSP: 0018:ffffc90000007428 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffffc90000007548 RCX: ffffc90005c18000
RDX: ffffc90000007528 RSI: ffffc90005c20000 RDI: ffffc90005c1fcf0
RBP: 1ffff92000000ea6 R08: 0000000000000001 R09: ffffffff8e75e5e0
R10: ffffc90000007578 R11: ffffffff81b0c390 R12: 0000000000000001
R13: 0000000000000004 R14: 0000000000000001 R15: ffff8881152f3a80
FS:  00007f2911def6c0(0000) GS:ffff88818de5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2098c63bd0 CR3: 000000010570c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0xdbe/0x23c0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x2bc/0x650
 dst_alloc+0x105/0x170
 icmp6_dst_alloc+0x75/0x440
 ndisc_send_skb+0x44a/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:preempt_schedule_irq+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 e3 e7 e3 f5 e8 4e 86 1d f6 fb bf 01 00 00 00 <e8> c3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 24 88 1d f6 bf 01
RSP: 0018:ffffc90005c1fda0 EFLAGS: 00000202
RAX: 00000000000005cb RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8def8e53 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__x64_sys_socket+0x2d/0x90
Code: fa 41 57 41 56 41 54 53 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 b3 95 53 f8 48 8d 7b 70 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 05 e8 5c fa bd f8 4c 8b 73 70 48 8d 7b 68 48 89 f8 48 c1 e8 03
RSP: 0018:ffffc90005c1fec8 EFLAGS: 00000246
RAX: 1ffff92000b83ff7 RBX: ffffc90005c1ff48 RCX: 0000000000080000
RDX: ffffc90023b3d000 RSI: 0000000000000000 RDI: ffffc90005c1ffb8
RBP: ffffc90005c1ff38 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffc90005c1ff48 R15: ffff8881152f3a80
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2910f9c799
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:00007f2911def028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f2911216090 RCX: 00007f2910f9c799
RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007f2911032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2911216128 R14: 00007f2911216090 R15: 00007fffdf6f7ac8
 </TASK>
