rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=cec4/1/0x4000000000000000 softirq=43303/43303 fqs=5246
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1268606          0            0
rcu: 	cputime:    33697      18792           73   ==> 52490(ms)
rcu: 	(t=10502 jiffies g=43829 q=6872 ncpus=2)
CPU: 0 UID: 0 PID: 12120 Comm: syz.5.1639 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:aoecmd_cfg+0x203/0x820
Code: c0 08 89 44 24 08 4d 89 f5 49 81 c5 a8 fe ff ff 0f 84 a6 00 00 00 4c 89 ef be 01 00 00 00 e8 74 7e 47 02 49 8d 9e d0 04 00 00 <48> 89 df be 04 00 00 00 e8 80 4c 0f fb 41 bf 01 00 00 00 f0 45 0f
RSP: 0018:ffffc90000007b80 EFLAGS: 00000246
RAX: 54f4670c6e461900 RBX: ffff88816fe88628 RCX: ffffffff896485b7
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9a789fb4
RBP: ffffc90000007c90 R08: ffffffff9a789fb7 R09: 1ffffffff34f13f6
R10: dffffc0000000000 R11: fffffbfff34f13f7 R12: 00000000000000b0
R13: ffff88816fe88000 R14: ffff88816fe88158 R15: dffffc0000000000
FS:  00007f9a512af6c0(0000) GS:ffff88818e0a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 000000010d960000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 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:memset_orig+0x72/0xb0
Code: 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d8 0f 1f 84 00 00 00 00 00 89 d1 83 e1 38 74 14 c1 e9 03 66 0f 1f 44 00 00 ff c9 <48> 89 07 48 8d 7f 08 75 f5 83 e2 07 74 0a ff ca 88 07 48 8d 7f 01
RSP: 0018:ffffc90004ff78b8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8133ae06 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90004ff7a48
RBP: ffffc90004ff7ab0 R08: ffffc90004ff7a4f R09: 0000000000000000
R10: ffffc90004ff7a40 R11: fffff520009fef4a R12: ffff88810e598000
R13: 0000000000000001 R14: ffff88811336b208 R15: dffffc0000000000
 __schedule+0xaa/0x5070
 preempt_schedule_common+0x82/0xd0
 preempt_schedule_thunk+0x16/0x30
 try_to_wake_up+0x832/0x12a0
 wake_up_q+0x85/0xd0
 futex_wake+0x49a/0x580
 do_futex+0x395/0x420
 __se_sys_futex+0x3a8/0x450
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a5039acb9
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:00007f9a512af0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f9a50615fa8 RCX: 00007f9a5039acb9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f9a50615fac
RBP: 00007f9a50615fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9a50616038 R14: 00007fff108fdb90 R15: 00007fff108fdc78
 </TASK>
sched: DL replenish lagged too much
