rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (8722 ticks this GP) idle=e9c4/1/0x4000000000000000 softirq=19786/19786 fqs=4940
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1261092          0            0
rcu: 	cputime:     9908      42591           35   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=15025 q=10454 ncpus=2)
CPU: 1 UID: 0 PID: 6499 Comm: syz.0.193 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+0x151/0x2550
Code: 00 74 08 48 89 df e8 5e 9a ba 00 48 89 5c 24 28 48 8b 1b 48 85 db 74 23 48 81 c3 88 00 00 00 48 89 d8 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 a5 1c 00 00 f6 03 03 0f 85 ef 19 00 00 49 8d 5e 35 48
RSP: 0000:ffffc90000a07db8 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffc90007377ac0 RCX: 0000000000000102
RDX: 000000008eba6367 RSI: ffffffff8c28b6c0 RDI: ffffffff8c28b680
RBP: dffffc0000000000 R08: ffffffff8176f256 R09: ffffffff8e95cd60
R10: ffffc90000a07ed8 R11: ffffffff81b0f6a0 R12: ffffc90000a07ec0
R13: 1ffff92000140fd1 R14: ffffc90000a07e88 R15: ffffffff8176f256
FS:  00007f4e04ba56c0(0000) GS:ffff8882a9288000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33263fff CR3: 00000001bbe80000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x35c/0x760
 cfg80211_inform_single_bss_data+0x934/0x1af0
 cfg80211_inform_bss_data+0x266/0x3c40
 cfg80211_inform_bss_frame_data+0x3c7/0x730
 ieee80211_bss_info_update+0x794/0xa40
 ieee80211_scan_rx+0x552/0xa40
 ieee80211_rx_list+0x29f8/0x3740
 ieee80211_rx_napi+0x1b1/0x3e0
 ieee80211_handle_queued_frames+0xe8/0x1e0
 tasklet_action_common+0x2da/0x4b0
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 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 b3 57 e9 f5 e8 0e 6e 23 f6 fb bf 01 00 00 00 <e8> 53 a2 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 d4 6f 23 f6 bf 01
RSP: 0000:ffffc900073779c0 EFLAGS: 00000206
RAX: 00000000000d5ad7 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8dfab075 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff9030bef7 R09: 1ffffffff20617de
R10: dffffc0000000000 R11: fffffbfff20617df R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x14f/0x760
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:irq_work_sync+0x0/0x300
Code: ff ff ff e8 52 02 f0 ff 90 0f 0b e8 4a 02 f0 ff 90 0f 0b 0f 1f 80 00 00 00 00 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 50 49 89 fd 48 bb 00 00
RSP: 0000:ffffc90007377ae0 EFLAGS: 00000246
RAX: a1966d923813f500 RBX: ffff8881a70fa4c0 RCX: ffffffff8baac0fe
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881a70fa5d0
RBP: 0000000000000001 R08: ffffc90007377a67 R09: 1ffff92000e6ef4c
R10: dffffc0000000000 R11: fffff52000e6ef4d R12: ffff88810ea81d80
R13: ffffffff8e26a798 R14: ffffe8ffffc44740 R15: ffff8881a70fa678
 sched_mm_cid_exit+0x399/0x4f0
 do_exit+0x3a0/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x840
 irqentry_exit+0x289/0x760
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0033:0x7f4e03d9cdd9
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:00007f4e04ba5028 EFLAGS: 00000246
RAX: 0000000000000005 RBX: 00007f4e04015fa0 RCX: 00007f4e03d9cdd9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f4e03e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4e04016038 R14: 00007f4e04015fa0 R15: 00007fffc920ab88
 </TASK>
