rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=0b34/1/0x4000000000000000 softirq=32017/32022 fqs=3766
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   986268          0            0
rcu: 	cputime:    24209      28270           92   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=23061 q=9966 ncpus=2)
CPU: 1 UID: 0 PID: 10207 Comm: syz.0.1794 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-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:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1a 2a 2d f6 48 89 df e8 72 c1 2d f6 e8 dd 92 56 f6 fb bf 01 00 00 00 <e8> 42 c1 1f f6 65 8b 05 1b f9 2e 07 85 c0 74 07 5b e9 81 4c 00 00
RSP: 0000:ffffc900001e0c90 EFLAGS: 00000286
RAX: 468fa72c9ab87f00 RBX: ffff888136625940 RCX: 468fa72c9ab87f00
RDX: 0000000000000000 RSI: ffffffff8d998701 RDI: 0000000000000001
RBP: ffffc900001e0e10 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff888136625940
R13: 1ffff9200003c1ad R14: ffff8881260b68e0 R15: ffffc900001e0d68
FS:  00007fd7647306c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c31cacb CR3: 000000010b22c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __run_timer_base+0x60a/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: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 5b 22 21 f6 e8 96 f5 57 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: 0000:ffffc9000401fdc0 EFLAGS: 00000282
RAX: 468fa72c9ab87f00 RBX: 0000000000000000 RCX: 468fa72c9ab87f00
RDX: 0000000000000000 RSI: ffffffff8d998701 RDI: 0000000000000001
RBP: ffffc9000401fe70 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000803fb8
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:its_return_thunk+0x0/0x10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 cb ea c1 f5 cc
RSP: 0000:ffffc9000401ff30 EFLAGS: 00000286
RAX: 468fa72c9ab87f00 RBX: ffffc9000401ff58 RCX: 468fa72c9ab87f00
RDX: 0000000000000000 RSI: ffffffff8d998701 RDI: ffffffff8be29f80
RBP: 0000000000000000 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: ffff888108d81cc0 R15: 0000000000000008
 irqentry_exit_to_user_mode+0x51/0x120
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7fd76398eb69
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:00007fd7647300e8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 00007fd763bb6088 RCX: 00007fd76398eb69
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fd763bb608c
RBP: 00007fd763bb6080 R08: 7fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fd763bb608c
R13: 0000000000000000 R14: 00007ffe24fb8590 R15: 00007ffe24fb8678
 </TASK>
sched: DL replenish lagged too much
