rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (8510 ticks this GP) idle=7784/1/0x4000000000000000 softirq=29695/29695 fqs=4623
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   699746          0            0
rcu: 	cputime:    39468      12921           76   ==> 52400(ms)
rcu: 	(t=10502 jiffies g=20009 q=1601 ncpus=2)
CPU: 0 UID: 0 PID: 7178 Comm: syz.7.200 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+0x5/0x2390
Code: e1 07 80 c1 03 38 c1 7c 92 48 89 df e8 04 16 b1 00 eb 88 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 49 89 fe 48 bd 00
RSP: 0018:ffffc90000006c58 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90000006d20 RCX: da5a58679eafdf00
RDX: dffffc0000000000 RSI: ffffffff8b7b122f RDI: ffffc90000006c68
RBP: ffffc90000006cf0 R08: ffffc90000006d30 R09: 0000000000000015
R10: ffffc90000006cb8 R11: ffffffff81ac5140 R12: ffff88801af1b980
R13: ffffc90000007280 R14: ffffffff81ac5140 R15: ffffc90000006c68
FS:  00007f799a2286c0(0000) GS:ffff8880b8612000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe4a5d05000 CR3: 0000000029592000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000f9060a
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kvfree_call_rcu+0xbb/0x410
 cfg80211_update_known_bss+0x84b/0x13c0
 __cfg80211_bss_update+0x147/0x2120
 cfg80211_inform_single_bss_data+0xba9/0x1ac0
 cfg80211_inform_bss_data+0x1fb/0x3b30
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x746/0x9e0
 ieee80211_scan_rx+0x593/0xa20
 ieee80211_rx_list+0x201c/0x2a90
 ieee80211_rx_napi+0x1a8/0x3d0
 ieee80211_handle_queued_frames+0xe8/0x1f0
 tasklet_action_common+0x36c/0x580
 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:__schedule+0x0/0x4cc0
Code: a8 f6 45 89 f8 89 d9 48 8b 5c 24 08 e9 ee fe ff ff cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48
RSP: 0018:ffffc9000259eb18 EFLAGS: 00000282
RAX: da5a58679eafdf00 RBX: 0000000000000000 RCX: da5a58679eafdf00
RDX: 0000000000000007 RSI: ffffffff8d9baed8 RDI: 0000000000000001
RBP: ffffc9000259ebc0 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920004b3d64
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:mod_node_state+0x31/0x160
Code: 41 54 53 89 cd 41 89 d4 41 89 f7 49 89 fe 48 8d 9f 40 5a 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 85 b6 20 00 4c 8b 2b 44 89 fb 41 83 ff 32 0f 83
RSP: 0018:ffffc9000259ec88 EFLAGS: 00000246
RAX: 1ffff1100c0001c8 RBX: ffff888060000e40 RCX: dffffc0000000000
RDX: ffffffffffffe000 RSI: 0000000000000006 RDI: ffff88805fffb400
RBP: 0000000000000000 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: 00000000ffffe000
R13: 0000000000100001 R14: ffff88805fffb400 R15: 0000000000000006
 __free_slab+0xff/0x1a0
 __slab_free+0x303/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_kmalloc+0x22/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 fib6_info_alloc+0x30/0xf0
 ip6_route_info_create+0x142/0x860
 addrconf_f6i_alloc+0x1d2/0x450
 ipv6_add_addr+0x56e/0x1090
 inet6_addr_add+0x387/0xc00
 inet6_rtm_newaddr+0x93d/0xd20
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/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: 0033:0x7f799938ec29
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:00007f799a228038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f79995d5fa0 RCX: 00007f799938ec29
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000000a
RBP: 00007f7999411e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f79995d6038 R14: 00007f79995d5fa0 R15: 00007ffd7f1d9438
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 85045663739 wd_nsec: 85045668454
