rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=7ac4/1/0x4000000000000000 softirq=14303/14304 fqs=5207
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1258893          0            0
rcu: 	cputime:     6760      45729           31   ==> 52490(ms)
rcu: 	(t=10501 jiffies g=11317 q=3986 ncpus=2)
CPU: 1 UID: 0 PID: 6155 Comm: syz.2.110 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:__pi___x86_indirect_thunk_r11+0x0/0x20
Code: 00 00 00 0f 1f 80 00 00 00 00 e8 01 00 00 00 cc 4c 89 14 24 e9 d1 0a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 <e8> 01 00 00 00 cc 4c 89 1c 24 c3 cc cc cc cc 66 2e 0f 1f 84 00 00
RSP: 0018:ffffc90000a08500 EFLAGS: 00000282
RAX: ffffffff8a55484f RBX: ffffc90000a085c0 RCX: 0000000000000100
RDX: 0000000000000001 RSI: ffffffff8a55484f RDI: ffffc90000a085c0
RBP: ffffc90000a08590 R08: ffffc90000a08990 R09: 0000000000000000
R10: ffffc90000a08558 R11: ffffffff81b07190 R12: ffff888174438000
R13: ffff888174018700 R14: ffffffff81b07190 R15: ffffc90000a08508
FS:  00007fb91799f6c0(0000) GS:ffff8882a92b8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2d60c4 CR3: 0000000115f04000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 </TASK>
sched: DL replenish lagged too much
