------------[ cut here ]------------
WARNING: CPU: 1 PID: 1710 at kernel/rcu/tree_stall.h:824 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:816
Modules linked in:
CPU: 1 PID: 1710 Comm: kworker/1:2 Not tainted 5.11.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker
RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:824
Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 e0 33 e4 8f e8 3e 8b 56 00 b8 01 00 00 00 87 05 e3 45 84 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd 80 c9 f7 8b 48 c7 c3 0c f0 c5 8d 74 58 48 b8 00 00
RSP: 0018:ffffc90000508e68 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000100008216 RCX: ffffffff815fedf2
RDX: fffffbfff1fc867c RSI: 0000000000000004 RDI: ffffffff8fe433e0
RBP: ffffffff8bf7c980 R08: 0000000000000001 R09: 0000000000000003
R10: fffffbfff1fc867c R11: 1ffff11005966c2e R12: 1ffffffff1781e30
R13: 0000000000000246 R14: ffff88802cb36092 R15: ffff88802cb36118
FS:  0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff3e170e000 CR3: 00000000148a6000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_check_gp_start_stall kernel/rcu/tree_stall.h:787 [inline]
 rcu_core+0x4d6/0x1280 kernel/rcu/tree.c:2789
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 do_softirq+0xb3/0xe0 kernel/softirq.c:233
 __local_bh_enable_ip+0xf4/0x110 kernel/softirq.c:196
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:745 [inline]
 mod_peer_timer drivers/net/wireguard/timers.c:38 [inline]
 wg_timers_any_authenticated_packet_traversal+0x243/0x330 drivers/net/wireguard/timers.c:215
 wg_receive_handshake_packet+0x54d/0xb40 drivers/net/wireguard/receive.c:209
 wg_packet_handshake_receive_worker+0x45/0x90 drivers/net/wireguard/receive.c:220
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294