rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=c5cc/1/0x4000000000000000 softirq=19330/19332 fqs=5246
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   960303          0            0
rcu: 	cputime:    24528      27960          114   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=11085 q=29673 ncpus=2)
CPU: 1 UID: 0 PID: 6875 Comm: syz.2.336 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e #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:rcu_read_unlock_special+0x87/0x4c0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 62 2c f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001e05a0 EFLAGS: 00000206
RAX: 5fee568ced9b0800 RBX: 1ffff9200003c0bc RCX: 5fee568ced9b0800
RDX: 0000000000000003 RSI: ffffffff8d998836 RDI: ffffffff8be29f40
RBP: ffffc900001e0698 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f64e85976c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3015ffff CR3: 000000010e1bc000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kfree+0x18e/0x440
 slab_free_after_rcu_debug+0x60/0x2a0
 rcu_core+0xca8/0x1710
 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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 8b 2d 21 f6 e8 c6 00 58 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000330f3a0 EFLAGS: 00000286
RAX: 5fee568ced9b0800 RBX: 0000000000000000 RCX: 5fee568ced9b0800
RDX: 0000000000000007 RSI: ffffffff8d998836 RDI: 0000000000000001
RBP: ffffc9000330f450 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000661e74
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kasan_quarantine_put+0x88/0x220
Code: e8 ad 5a a4 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 0f 85 88 00 00 00 41 f7 c7 00 02 00 00 74 01 fb 31 c0 <48> 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f e9 06 09 4e 09 cc 48 8d 80
RSP: 0018:ffffc9000330f518 EFLAGS: 00000206
RAX: 5fee568ced9b0801 RBX: ffff88810e584000 RCX: 5fee568ced9b0800
RDX: 0000000000000007 RSI: ffffffff8d998836 RDI: ffffffff8be29f40
RBP: 0000000000000000 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff88801a442140
R13: 0000000000000000 R14: 00000000000063d8 R15: 0000000000000286
 kfree+0x18e/0x440
 tomoyo_realpath_from_path+0x598/0x5d0
 tomoyo_check_open_permission+0x1c1/0x3b0
 security_file_open+0xb1/0x270
 do_dentry_open+0x35e/0x1970
 vfs_open+0x3b/0x340
 path_openat+0x2ee5/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f64e778e9a9
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:00007f64e8597038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f64e79b5fa0 RCX: 00007f64e778e9a9
RDX: 00000000000c1842 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007f64e7810d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f64e79b5fa0 R15: 00007ffdadc4e718
 </TASK>
sched: DL replenish lagged too much
