=============================
[ BUG: Invalid wait context ]
6.15.0-syzkaller-10769-g7d4e49a77d99 #0 Not tainted
-----------------------------
kworker/3:0/34 is trying to lock:
ffffc9000c79a410 (&gpc->lock){....}-{3:3}, at: kvm_xen_set_evtchn_fast+0x254/0xeb0 arch/x86/kvm/xen.c:1819
other info that might help us debug this:
context-{2:2}
3 locks held by kworker/3:0/34:
 #0: ffff88801b886d48 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
 #1: ffffc900006dfd10 ((work_completion)(&(&ssp->srcu_sup->work)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
 #2: ffffc9000c79a960 (&kvm->srcu){.?.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
 #2: ffffc9000c79a960 (&kvm->srcu){.?.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
 #2: ffffc9000c79a960 (&kvm->srcu){.?.+}-{0:0}, at: kvm_xen_set_evtchn_fast+0x23a/0xeb0 arch/x86/kvm/xen.c:1817
stack backtrace:
CPU: 3 UID: 0 PID: 34 Comm: kworker/3:0 Not tainted 6.15.0-syzkaller-10769-g7d4e49a77d99 #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
Workqueue: rcu_gp process_srcu
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 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+0xa12/0x1c90 kernel/locking/lockdep.c:5190
 lock_acquire kernel/locking/lockdep.c:5871 [inline]
 lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
 _raw_read_lock_irqsave+0x46/0x90 kernel/locking/spinlock.c:236
 kvm_xen_set_evtchn_fast+0x254/0xeb0 arch/x86/kvm/xen.c:1819
 xen_timer_callback+0x1db/0x2a0 arch/x86/kvm/xen.c:140
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x5ea/0xad0 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:queue_delayed_work_on+0x89/0x200 kernel/workqueue.c:2566
Code: 38 00 45 84 e4 74 3a e8 f5 2e 38 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 53 2a 38 00 48 85 db 0f 85 57 01 00 00 45 31 e4 <e8> d2 2e 38 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc
RSP: 0018:ffffc900006dfc28 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8183d321
RDX: ffff88801eaa4880 RSI: ffffffff8183d32b RDI: 0000000000000007
RBP: 0000000000000200 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000008 R14: ffff88801b886c00 R15: 0000000000000000
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	38 00                	cmp    %al,(%rax)
   2:	45 84 e4             	test   %r12b,%r12b
   5:	74 3a                	je     0x41
   7:	e8 f5 2e 38 00       	call   0x382f01
   c:	9c                   	pushf
   d:	5b                   	pop    %rbx
   e:	81 e3 00 02 00 00    	and    $0x200,%ebx
  14:	31 ff                	xor    %edi,%edi
  16:	48 89 de             	mov    %rbx,%rsi
  19:	e8 53 2a 38 00       	call   0x382a71
  1e:	48 85 db             	test   %rbx,%rbx
  21:	0f 85 57 01 00 00    	jne    0x17e
  27:	45 31 e4             	xor    %r12d,%r12d
* 2a:	e8 d2 2e 38 00       	call   0x382f01 <-- trapping instruction
  2f:	44 89 e0             	mov    %r12d,%eax
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	41 5d                	pop    %r13
  38:	41 5e                	pop    %r14
  3a:	41 5f                	pop    %r15
  3c:	c3                   	ret
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3