------------[ cut here ]------------
WARNING: CPU: 1 PID: 9513 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: 9513 Comm: kworker/1:4 Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: wg-kex-wg0 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 20 95 e2 8f e8 6e 56 57 00 b8 01 00 00 00 87 05 e3 3b 82 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd 00 c9 f7 8b 48 c7 c3 0c 5c c5 8d 74 58 48 b8 00 00
RSP: 0018:ffffc900004f8e50 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000100004a7c RCX: ffffffff81605932
RDX: fffffbfff1fc52a4 RSI: 0000000000000004 RDI: ffffffff8fe29520
RBP: ffffffff8bf7c900 R08: 0000000000000001 R09: 0000000000000003
R10: fffffbfff1fc52a4 R11: ffffffff8bf7c940 R12: 1ffffffff1781e30
R13: 0000000000000246 R14: ffff88802cb35fd2 R15: ffff88802cb36058
FS:  0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f58fbd6b07c CR3: 000000001ad87000 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+0x4ec/0x12f0 kernel/rcu/tree.c:2789
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345
 invoke_softirq kernel/softirq.c:221 [inline]
 __irq_exit_rcu kernel/softirq.c:422 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:qlink_free mm/kasan/quarantine.c:144 [inline]
RIP: 0010:qlist_free_all+0x50/0xc0 mm/kasan/quarantine.c:165
Code: 49 89 fd 49 bc 00 00 00 00 00 fc ff df eb 2d 48 63 87 c0 00 00 00 48 c7 c2 45 b5 b7 81 4c 8b 3e 48 29 c6 48 89 f0 48 c1 e8 03 <42> c6 04 20 fb e8 16 c1 ff ff 4d 85 ff 74 3b 4c 89 fe 48 85 ed 48
RSP: 0018:ffffc90009427b18 EFLAGS: 00010a06
RAX: 1ffff1100e6fb400 RBX: ffff8880129f7000 RCX: ffffea0001cdf600
RDX: ffffffff81b7b545 RSI: ffff8880737da000 RDI: ffff888010443040
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000028
R10: ffffffff813371ca R11: 000000000000003f R12: dffffc0000000000
R13: ffffc90009427b50 R14: ffffea0000000000 R15: ffff88807806b040
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 ____kasan_kmalloc mm/kasan/common.c:472 [inline]
 __kasan_kmalloc+0xad/0xc0 mm/kasan/common.c:515
 kmalloc include/linux/slab.h:554 [inline]
 kzalloc include/linux/slab.h:684 [inline]
 keypair_create drivers/net/wireguard/noise.c:100 [inline]
 wg_noise_handshake_begin_session+0xe2/0xe00 drivers/net/wireguard/noise.c:794
 wg_receive_handshake_packet+0x39e/0xb40 drivers/net/wireguard/receive.c:183
 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