rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (8209 ticks this GP) idle=e5ac/1/0x4000000000000000 softirq=15575/15576 fqs=3997
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1160196          5            0
rcu: 	cputime:    30835      21654           43   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=8777 q=3607 ncpus=2)
CPU: 0 UID: 0 PID: 6061 Comm: syz.1.46 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+0x199a/0x2390
Code: 74 28 80 3d c0 8d 1a 0e 00 75 1f c6 05 b7 8d 1a 0e 01 48 c7 c7 a0 41 88 8b be 66 03 00 00 48 c7 c2 40 42 88 8b e8 26 b4 2a 00 <48> c7 c7 60 a1 13 8e 4c 89 fe e8 07 9a 2a 00 e8 92 45 34 00 89 d8
RSP: 0018:ffffc90000006b98 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff9040d801 RCX: d84ae3de27aa8700
RDX: ffffc90000006c01 RSI: ffffffff8be34460 RDI: ffffffff8be34420
RBP: dffffc0000000000 R08: ffffc9000443fd28 R09: 0000000000000000
R10: ffffc90000006cb8 R11: fffff52000000d99 R12: ffffc9000443fd38
R13: ffffc90004438000 R14: ffffc90000006c68 R15: ffffffff8172d195
FS:  00007f5d5e85c6c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7de034cd58 CR3: 000000001fc8a000 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
 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:strlen+0x5d/0x70
Code: ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 59 fc ac f6 4c 89 e7 eb d6 5b <41> 5c 41 5e 41 5f e9 18 00 07 00 cc 0f 1f 80 00 00 00 00 90 90 90
RSP: 0018:ffffc9000443f760 EFLAGS: 00000246
RAX: 000000000000000d RBX: ffffffff8e13a178 RCX: 000000008b8bd505
RDX: ffffffff8172d195 RSI: ffffffff8e13a160 RDI: ffffffff8b8bd560
RBP: ffffc9000443f880 R08: ffffc9000443ff48 R09: 0000000000000000
R10: ffffc9000443fa18 R11: fffff52000887f45 R12: 1ffff92000887ef8
R13: ffffffff8172d195 R14: dffffc0000000000 R15: 000000000000000c
 perf_trace_lock+0xc2/0x3b0
 lock_release+0x3b2/0x3e0
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x1c6/0x3d0
 sock_alloc_inode+0x28/0xc0
 alloc_inode+0x6a/0x1b0
 __sock_create+0x12d/0x9f0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5d5d98ec29
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:00007f5d5e85c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f5d5dbd6090 RCX: 00007f5d5d98ec29
RDX: 0000000000000006 RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007f5d5da11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5d5dbd6128 R14: 00007f5d5dbd6090 R15: 00007ffd6b195468
 </TASK>
