=============================
[ BUG: Invalid wait context ]
6.15.0-syzkaller-13473-gc0c9379f235d #0 Not tainted
-----------------------------
syz.0.0/5324 is trying to lock:
ffffc900019cf410 (&gpc->lock){....}-{3:3}, at: kvm_xen_set_evtchn_fast+0x1fb/0x9b0 arch/x86/kvm/xen.c:1819
other info that might help us debug this:
context-{2:2}
1 lock held by syz.0.0/5324:
 #0: ffffc900019cf960 (&kvm->srcu){.?.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
 #0: ffffc900019cf960 (&kvm->srcu){.?.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
 #0: ffffc900019cf960 (&kvm->srcu){.?.+}-{0:0}, at: kvm_xen_set_evtchn_fast+0x1c3/0x9b0 arch/x86/kvm/xen.c:1817
stack backtrace:
CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.15.0-syzkaller-13473-gc0c9379f235d #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4833 [inline]
 check_wait_context kernel/locking/lockdep.c:4905 [inline]
 __lock_acquire+0xbcb/0xd20 kernel/locking/lockdep.c:5190
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
 _raw_read_lock_irqsave+0xaf/0x100 kernel/locking/spinlock.c:236
 kvm_xen_set_evtchn_fast+0x1fb/0x9b0 arch/x86/kvm/xen.c:1819
 xen_timer_callback+0x109/0x220 arch/x86/kvm/xen.c:140
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x4dd/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7f2563250d46
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007f25642ab4a0 EFLAGS: 00000202
RAX: 00000000002b792d RBX: 00007f25642ab540 RCX: 0000000000000084
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f25642ab5e0
RBP: 0000000000000102 R08: 00007f2557200000 R09: 00000000002b792c
R10: 0000000000000000 R11: 00007f25642ab550 R12: 0000000000000001
R13: 00007f256342c020 R14: 0000000000000000 R15: 00007f25642ab5e0
 </TASK>