linux-kernel - [syzbot] [wireguard?] WARNING: locking bug in wg_packet_decrypt

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Message-ID: <676967ce.050a0220.2f3838.0097.GAE@google.com>
Date: Mon, 23 Dec 2024 05:38:22 -0800
From: syzbot <syzbot+c40f14a86aa820015153@...kaller.appspotmail.com>
To: Jason@...c4.com, andrew+netdev@...n.ch, davem@...emloft.net, 
	edumazet@...gle.com, kuba@...nel.org, linux-kernel@...r.kernel.org, 
	netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, 
	wireguard@...ts.zx2c4.com
Subject: [syzbot] [wireguard?] WARNING: locking bug in wg_packet_decrypt_worker
 (2)

Hello,

syzbot found the following issue on:

HEAD commit:    eabcdba3ad40 Merge tag 'for-6.13-rc3-tag' of git://git.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10a41f44580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6a2b862bf4a5409f
dashboard link: https://syzkaller.appspot.com/bug?extid=c40f14a86aa820015153
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2be6996abd02/disk-eabcdba3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4e177f4e98c0/vmlinux-eabcdba3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bbf1b6ecbf58/bzImage-eabcdba3.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c40f14a86aa820015153@...kaller.appspotmail.com

------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 5889 at kernel/locking/lockdep.c:232 hlock_class kernel/locking/lockdep.c:232 [inline]
WARNING: CPU: 0 PID: 5889 at kernel/locking/lockdep.c:232 check_wait_context kernel/locking/lockdep.c:4850 [inline]
WARNING: CPU: 0 PID: 5889 at kernel/locking/lockdep.c:232 __lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5176
Modules linked in:
CPU: 0 UID: 0 PID: 5889 Comm: kworker/0:5 Not tainted 6.13.0-rc3-syzkaller-00073-geabcdba3ad40 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: wg-crypt-wg2 wg_packet_decrypt_worker
RIP: 0010:hlock_class kernel/locking/lockdep.c:232 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4850 [inline]
RIP: 0010:__lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5176
Code: 00 00 83 3d 21 f4 9e 0e 00 75 23 90 48 c7 c7 00 96 0a 8c 48 c7 c6 00 99 0a 8c e8 67 5d e5 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f
RSP: 0018:ffffc9000488f450 EFLAGS: 00010046
RAX: d0f6e83a7c789700 RBX: 0000000000001201 RCX: ffff88802ede3c00
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000041201 R08: ffffffff81601a42 R09: 1ffff110170c519a
R10: dffffc0000000000 R11: ffffed10170c519b R12: ffff88802ede46c4
R13: 000000000000000a R14: 1ffff11005dbc8ea R15: ffff88802ede4750
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30112ff8 CR3: 000000000e736000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
 _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:365 [inline]
 wg_packet_decrypt_worker+0xcf/0xd80 drivers/net/wireguard/receive.c:499
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>


---
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