rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=1edc/1/0x4000000000000000 softirq=13528/13528 fqs=4822
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1125225          0            0
rcu: 	cputime:    28907      23582           42   ==> 52490(ms)
rcu: 	(t=10502 jiffies g=7001 q=2998 ncpus=2)
CPU: 0 UID: 0 PID: 6096 Comm: syz.0.73 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+0x130e/0x2390
Code: c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49
RSP: 0018:ffffc90000006cf8 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: ffffffff8ffef628 RCX: dffffc0000000000
RDX: ffffffff8ffef600 RSI: ffffffff90b0ab80 RDI: ffffffff8bbf0e00
RBP: ffffffff8ffef600 R08: 000000000000000b R09: ffffffff81738c45
R10: ffffc90000006e18 R11: ffffffff81ac31b0 R12: ffffffff8b4819a2
R13: ffffffff8ffef600 R14: ffffc90000006dc8 R15: ffffffff8ffef614
FS:  00007f9fac4cf6c0(0000) GS:ffff88818eb38000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c29a160 CR3: 00000001100fa000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x411/0x7f0
 cfg80211_inform_single_bss_data+0x905/0x1ac0
 cfg80211_inform_bss_data+0x203/0x3b40
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x749/0x9e0
 ieee80211_scan_rx+0x593/0xa20
 ieee80211_rx_list+0x2192/0x2c10
 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 ef 79 b8 09 e8 5a b9 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 58 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90003a37718 EFLAGS: 00000286
RAX: 06362aa9eb7c8300 RBX: 0000000000000000 RCX: 06362aa9eb7c8300
RDX: 0000000000000007 RSI: ffffffff8d70f100 RDI: ffffffff8bbf0e60
RBP: ffffc90003a37770 R08: ffffffff8f7cf077 R09: 1ffffffff1ef9e0e
R10: dffffc0000000000 R11: fffffbfff1ef9e0f R12: ffff888115f23a00
R13: dffffc0000000000 R14: ffff888114af5700 R15: ffff88812123ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 __slab_alloc+0xcb/0x100
 __kmalloc_noprof+0x471/0x7f0
 tomoyo_realpath_from_path+0xe3/0x5d0
 tomoyo_path_number_perm+0x1e8/0x5a0
 security_file_ioctl+0xcb/0x2d0
 __se_sys_ioctl+0x47/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9fab58f749
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:00007f9fac4cf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9fab7e5fa0 RCX: 00007f9fab58f749
RDX: 0000200000000400 RSI: 0000000000008924 RDI: 0000000000000003
RBP: 00007f9fab613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9fab7e6038 R14: 00007f9fab7e5fa0 R15: 00007ffda9b85898
 </TASK>
sched: DL replenish lagged too much
