rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=936c/1/0x4000000000000000 softirq=12701/12702 fqs=4846
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   953244          2            0
rcu: 	cputime:    37451      15037           53   ==> 52490(ms)
rcu: 	(t=10502 jiffies g=8441 q=3903 ncpus=2)
CPU: 0 UID: 0 PID: 6024 Comm: syz.2.36 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+0xaa7/0x23c0
Code: 4c 89 e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 60 15 00 00 48 0f bf 02 48 01 c3 4d 8d 7e 08 4d 89 fc 49 c1 ec 03 41 80 3c 2c 00 <74> 08 4c 89 ff e8 4f 7e b9 00 4c 89 7c 24 18 4d 8b 7e 08 4d 8d 6e
RSP: 0018:ffffc90000006cb8 EFLAGS: 00000246
RAX: 1ffff92000000db8 RBX: ffffc90000007ff8 RCX: ffffffff9099fc88
RDX: ffffffff914e14da RSI: ffffffff914e14de RDI: ffffffff8c27c9a0
RBP: dffffc0000000000 R08: 000000000000000d R09: ffffffff8e75e5e0
R10: ffffc90000006dd8 R11: ffffffff81b0c390 R12: 1ffff92000000db2
R13: ffffc90000006dd8 R14: ffffc90000006d88 R15: ffffc90000006d90
FS:  00007f5ab79d56c0(0000) GS:ffff88818de5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000002 CR3: 00000001169b4000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0100000000000000 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_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c1/0x630
 ieee80211_inform_bss+0xc75/0x1160
 cfg80211_inform_single_bss_data+0xd08/0x1b70
 cfg80211_inform_bss_data+0x266/0x3c40
 cfg80211_inform_bss_frame_data+0x3c7/0x760
 ieee80211_bss_info_update+0x794/0xa40
 ieee80211_scan_rx+0x552/0xa40
 ieee80211_rx_list+0x29e5/0x3710
 ieee80211_rx_napi+0x1b1/0x3e0
 ieee80211_handle_queued_frames+0xe8/0x1e0
 tasklet_action_common+0x2da/0x4b0
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 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 e3 e7 e3 f5 e8 4e 86 1d f6 fb bf 01 00 00 00 <e8> c3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 24 88 1d f6 bf 01
RSP: 0018:ffffc900073ef490 EFLAGS: 00000202
RAX: 00000000000023a1 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000007 RSI: ffffffff8def8e53 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x20b/0x2e0
Code: e9 30 ff ff ff e8 45 45 0d 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 c1 d2 7a 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d fe 7a 73
RSP: 0018:ffffc900073ef5b8 EFLAGS: 00000286
RAX: 870bde88a8622800 RBX: 0000000000000246 RCX: 0000000000000046
RDX: 00000000617de5e9 RSI: ffffffff8e169d5a RDI: ffffffff8c27ca00
RBP: 0000000000000000 R08: ffffffff81767e95 R09: ffffffff8e75e5e0
R10: ffffc900073ef718 R11: ffffffff81b0c390 R12: 0000000000000002
R13: ffffffff8e75e5e0 R14: 0000000000000000 R15: 0000000000000000
 unwind_next_frame+0xc2/0x23c0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 __kfence_alloc+0x2ed/0x3e0
 __kmalloc_noprof+0x622/0x760
 tomoyo_realpath_from_path+0xe3/0x5d0
 tomoyo_path_number_perm+0x246/0x630
 security_file_ioctl+0xc3/0x2a0
 __se_sys_ioctl+0x47/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ab979c799
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:00007f5ab79d5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5ab9a16180 RCX: 00007f5ab979c799
RDX: 0000000000000006 RSI: 0000000040042408 RDI: 000000000000000b
RBP: 00007f5ab9832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5ab9a16218 R14: 00007f5ab9a16180 R15: 00007ffee14aa3a8
 </TASK>
sched: DL replenish lagged too much
