rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=5fb4/1/0x4000000000000000 softirq=36318/36319 fqs=5244
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   809624          0            0
rcu: 	cputime:    37284      15214           63   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=25605 q=3930 ncpus=2)
CPU: 1 UID: 0 PID: 9773 Comm: syz.2.1062 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+0xa64/0x2390
Code: 48 89 d0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 82 17 00 00 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 99 17 00 00 48 0f bf 02 <49> 01 c4 48 8d 5e 01 48 8b 44 24 40 0f b6 04 28 84 c0 0f 85 78 13
RSP: 0018:ffffc900001e0598 EFLAGS: 00000246
RAX: 0000000000000010 RBX: ffffffff904080fd RCX: ffffffff8fc02470
RDX: ffffffff904080fc RSI: ffffffff90408100 RDI: ffffffff8be332a0
RBP: dffffc0000000000 R08: 0000000000000008 R09: ffffffff8172c195
R10: dffffc0000000000 R11: ffffffff81ac3930 R12: ffffc900001e09e0
R13: ffffc900001e06b8 R14: ffffc900001e0668 R15: ffffc900001e06a0
FS:  00007f8fc976a6c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000010867e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free+0x18f/0x400
 inet_frag_destroy+0x17b/0x2a0
 ip_expire+0x5b5/0x8f0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 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 2f c7 ea 09 e8 5a 3f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90007db7718 EFLAGS: 00000286
RAX: 76c34cc2baaea400 RBX: 0000000000000000 RCX: 76c34cc2baaea400
RDX: 0000000000000006 RSI: ffffffff8d9b6ac3 RDI: ffffffff8be33300
RBP: ffffc90007db7770 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffff888108821cc0
R13: dffffc0000000000 R14: ffff888106cc1cc0 R15: ffff88813663ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 smp_call_function_single+0x470/0x590
 perf_install_in_context+0x593/0x8f0
 __se_sys_perf_event_open+0x193a/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8fc898ebe9
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:00007f8fc976a038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f8fc8bc5fa0 RCX: 00007f8fc898ebe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00007f8fc8a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8fc8bc6038 R14: 00007f8fc8bc5fa0 R15: 00007ffc766b22b8
 </TASK>
sched: DL replenish lagged too much
