rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=7164/1/0x4000000000000000 softirq=20655/20663 fqs=5250
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   950371          0            0
rcu: 	cputime:    24430      28059           92   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=10541 q=1250 ncpus=2)
CPU: 1 UID: 0 PID: 6931 Comm: syz.3.270 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #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:process_backlog+0xf58/0x14f0
Code: 7e c8 c9 f8 49 c7 46 28 00 00 00 00 4c 89 f7 48 89 de e8 fb c6 44 f8 48 8b 7c 24 68 e8 01 92 17 02 8b 44 24 14 48 89 44 24 30 <e9> 98 f2 ff ff 90 e8 cd 81 64 fb 41 89 c7 31 ff 89 c6 e8 c1 a7 66
RSP: 0018:ffffc900001e0a60 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff89597865 RCX: 0000000000000100
RDX: 0000000000000002 RSI: ffffffff8d998874 RDI: 00000000ffffffff
RBP: ffffc900001e0b88 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff88813663ba50
R13: dffffc0000000000 R14: ffff88813663baa8 R15: ffff88813663bbf0
FS:  00007f5c44bf76c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c382c03 CR3: 000000003ad48000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __napi_poll+0xc7/0x480
 net_rx_action+0x707/0xe30
 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:lock_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 0b d4 01 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90002caf8f8 EFLAGS: 00000206
RAX: fbdd0c53f2dd8600 RBX: 0000000000000000 RCX: fbdd0c53f2dd8600
RDX: 0000000000000000 RSI: ffffffff8db86591 RDI: ffffffff8be29f40
RBP: ffffffff81b46555 R08: 0000000000000000 R09: ffffffff81b46555
R10: dffffc0000000000 R11: ffffed1020251a01 R12: 0000000000000000
R13: ffff88810128d020 R14: 0000000000000001 R15: 0000000000000246
 _raw_spin_lock+0x2e/0x40
 futex_wait_setup+0xa5/0x460
 __futex_wait+0x148/0x3e0
 futex_wait+0x104/0x360
 do_futex+0x333/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c44d8e9a9
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:00007f5c44bf70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f5c44fb5fa8 RCX: 00007f5c44d8e9a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5c44fb5fa8
RBP: 00007f5c44fb5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5c44fb5fac
R13: 0000000000000000 R14: 00007ffc66736d60 R15: 00007ffc66736e48
 </TASK>
sched: DL replenish lagged too much
