rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=5d4c/1/0x4000000000000000 softirq=65391/65391 fqs=5065
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   955474          1            0
rcu: 	cputime:    35228      17251          108   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=48017 q=3279 ncpus=2)
CPU: 1 UID: 0 PID: 14518 Comm: syz.6.2465 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:__sanitizer_cov_trace_pc+0x0/0x70
Code: 89 fb e8 23 00 00 00 48 8b 3d 24 42 55 0c 48 89 de 5b e9 03 9a 5e 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 48 32 56 11 65 8b 15 69 32 56
RSP: 0018:ffffc90000a08b08 EFLAGS: 00000246
RAX: ffffffff8b25745f RBX: ffff888045078900 RCX: 0000000000000100
RDX: ffff8881129b1d40 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888027728ee7 R09: 1ffff11004ee51dc
R10: dffffc0000000000 R11: ffffed1004ee51dd R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888045078900
FS:  00007f4d1f0686c0(0000) GS:ffff8882a9463000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000001 CR3: 00000001186a0000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ieee80211_clean_skb+0xa8/0x510
 ieee80211_rx_list+0x185f/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 63 d5 e4 f5 e8 1e 70 1e f6 fb bf 01 00 00 00 <e8> c3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 f4 71 1e f6 bf 01
RSP: 0018:ffffc90004477520 EFLAGS: 00000202
RAX: 000000000000154f RBX: ffff8881129b1d40 RCX: 0000000000000001
RDX: 0000000000000007 RSI: ffffffff8def4b84 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff90118bb7 R09: 1ffffffff2023176
R10: dffffc0000000000 R11: fffffbfff2023177 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_release+0x2d7/0x3d0
Code: 5b 7a 11 00 00 00 00 eb b5 e8 f5 27 0c 0a f7 c3 00 02 00 00 74 b9 65 48 8b 05 75 15 7a 11 48 3b 44 24 28 75 44 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 da 0d 0f 0a cc 48 8d 3d 72 27 73
RSP: 0018:ffffc90004477640 EFLAGS: 00000282
RAX: 9206a77da7addf00 RBX: 0000000000000202 RCX: 0000000000000046
RDX: 0000000000000001 RSI: ffffffff8e1655a0 RDI: ffffffff8c27b400
RBP: ffff8881129b28c0 R08: ffffc90004477ac0 R09: 0000000000000000
R10: ffffc90004477798 R11: fffff5200088eef5 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8e75e3e0 R15: ffff8881129b1d40
 unwind_next_frame+0x1aaa/0x23c0
 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
 tomoyo_realpath_from_path+0x598/0x5d0
 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: 0033:0x7f4d1e19c799
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:00007f4d1f068028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4d1e416090 RCX: 00007f4d1e19c799
RDX: 0000000000000007 RSI: 0000000040042408 RDI: 0000000000000008
RBP: 00007f4d1e232c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4d1e416128 R14: 00007f4d1e416090 R15: 00007ffc79c90c18
 </TASK>
sched: DL replenish lagged too much
