============================================
WARNING: possible recursive locking detected
6.9.0-rc6-syzkaller-01479-gb1de3c0df7ab #0 Not tainted
--------------------------------------------
kworker/u8:0/10 is trying to acquire lock:
ffff8880b942a718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1052

but task is already holding lock:
ffff8880b952a718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1052

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&base->lock);
  lock(&base->lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

5 locks held by kworker/u8:0/10:
 #0: ffff888070b4e948 ((wq_completion)wg-kex-wg1#3){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3242 [inline]
 #0: ffff888070b4e948 ((wq_completion)wg-kex-wg1#3){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x17c0 kernel/workqueue.c:3348
 #1: ffffc900000f7d00 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3243 [inline]
 #1: ffffc900000f7d00 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x17c0 kernel/workqueue.c:3348
 #2: ffffffff8e334f00 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
 #2: ffffffff8e334f00 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:833 [inline]
 #2: ffffffff8e334f00 (rcu_read_lock_bh){....}-{1:2}, at: mod_peer_timer+0x21/0x260 drivers/net/wireguard/timers.c:34
 #3: ffff8880b952a718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1052
 #4: ffffffff8ea35840 (fill_pool_map-wait-type-override){+.+.}-{3:3}, at: debug_objects_fill_pool+0x80/0x9b0 lib/debugobjects.c:614

stack backtrace:
CPU: 1 PID: 10 Comm: kworker/u8:0 Not tainted 6.9.0-rc6-syzkaller-01479-gb1de3c0df7ab #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 check_deadlock kernel/locking/lockdep.c:3062 [inline]
 validate_chain+0x15c1/0x58e0 kernel/locking/lockdep.c:3856
 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 lock_timer_base+0x112/0x240 kernel/time/timer.c:1052
 __mod_timer+0x1ca/0xeb0 kernel/time/timer.c:1133
 queue_delayed_work_on+0x15a/0x260 kernel/workqueue.c:2608
 queue_delayed_work include/linux/workqueue.h:620 [inline]
 schedule_delayed_work include/linux/workqueue.h:734 [inline]
 __debug_check_no_obj_freed lib/debugobjects.c:1012 [inline]
 debug_check_no_obj_freed+0x14a/0x580 lib/debugobjects.c:1019
 free_pages_prepare mm/page_alloc.c:1147 [inline]
 free_unref_page_prepare+0x322/0xab0 mm/page_alloc.c:2347
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
 stack_depot_save_flags+0x6f6/0x830 lib/stackdepot.c:673
 kasan_save_stack mm/kasan/common.c:48 [inline]
 kasan_save_track+0x51/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3798 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 kmem_cache_alloc+0x174/0x340 mm/slub.c:3852
 kmem_cache_zalloc include/linux/slab.h:739 [inline]
 fill_pool lib/debugobjects.c:168 [inline]
 debug_objects_fill_pool+0x6c6/0x9b0 lib/debugobjects.c:615
 debug_object_activate+0x135/0x510 lib/debugobjects.c:704
 debug_timer_activate kernel/time/timer.c:837 [inline]
 __mod_timer+0x89d/0xeb0 kernel/time/timer.c:1172
 mod_peer_timer+0x189/0x260 drivers/net/wireguard/timers.c:37
 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:36 [inline]
 wg_packet_handshake_send_worker+0x185/0x330 drivers/net/wireguard/send.c:51
 process_one_work kernel/workqueue.c:3267 [inline]
 process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3429
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>