rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (5053 ticks this GP) idle=535c/1/0x4000000000000000 softirq=20759/20769 fqs=5161
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1274894         61            0
rcu: 	cputime:    29368      21141           70   ==> 50520(ms)
rcu: 	(t=10501 jiffies g=13509 q=4985 ncpus=2)
CPU: 0 UID: 0 PID: 7053 Comm: syz.2.285 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+0x226/0x2390
Code: 00 00 44 89 f8 4c 8d 2c 85 a4 4e e0 90 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 48 89 eb 0f 85 1c 1c 00 00 45 8b 6d 00 44 89 f8 <ff> c0 48 8d 2c 85 a4 4e e0 90 48 89 e8 48 c1 e8 03 0f b6 04 18 84
RSP: 0018:ffffc90000006d38 EFLAGS: 00000246
RAX: 000000000009f5ed RBX: dffffc0000000000 RCX: d7d8660218344800
RDX: 00000000000a7e25 RSI: ffffffff8be33de0 RDI: ffffffff8be33da0
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8172d195
R10: ffffc90000006e58 R11: ffffffff81ac4d00 R12: ffffffff8af5edb7
R13: 00000000001c1bda R14: ffffc90000006e08 R15: 000000000009f5ed
FS:  00007fa6849706c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3251eff8 CR3: 000000002ee32000 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_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 cfg80211_inform_single_bss_data+0x905/0x1ac0
 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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 df c4 eb 09 e8 8a 41 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90006cdf218 EFLAGS: 00000286
RAX: d7d8660218344800 RBX: 0000000000000000 RCX: d7d8660218344800
RDX: 0000000000000000 RSI: ffffffff8d9ba160 RDI: ffffffff8be33e00
RBP: ffffc90006cdf270 R08: ffffffff8fa3a837 R09: 1ffffffff1f47506
R10: dffffc0000000000 R11: fffffbfff1f47507 R12: ffff88801fc3d640
R13: dffffc0000000000 R14: ffff888109c8b980 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x9a/0x270
 wait_woken+0xbd/0x1b0
 __inet_stream_connect+0x8f4/0xe80
 mptcp_sendmsg_fastopen+0x2a5/0x580
 mptcp_sendmsg+0x176c/0x1970
 __sock_sendmsg+0xe5/0x270
 ____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: 0033:0x7fa683b8eba9
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:00007fa684970038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa683dd5fa0 RCX: 00007fa683b8eba9
RDX: e07e872420dfef8a RSI: 0000200000000b00 RDI: 0000000000000004
RBP: 00007fa683c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa683dd6038 R14: 00007fa683dd5fa0 R15: 00007fffba616af8
 </TASK>
sched: DL replenish lagged too much
