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

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Message-ID: <67062030.050a0220.3f80e.0025.GAE@google.com>
Date: Tue, 08 Oct 2024 23:18:24 -0700
From: syzbot <syzbot+58510c37d7d3c2335e35@...kaller.appspotmail.com>
To: Jason@...c4.com, 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_encrypt_worker
 (2)

Hello,

syzbot found the following issue on:

HEAD commit:    27cc6fdf7201 Merge tag 'linux_kselftest-fixes-6.12-rc2' of..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16829bd0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6248f0ab12f33349
dashboard link: https://syzkaller.appspot.com/bug?extid=58510c37d7d3c2335e35
compiler:       gcc (Debian 12.2.0-14) 12.2.0, 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/6977fdc3f229/disk-27cc6fdf.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e3cb80988930/vmlinux-27cc6fdf.xz
kernel image: https://storage.googleapis.com/syzbot-assets/030bdb347b6a/bzImage-27cc6fdf.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+58510c37d7d3c2335e35@...kaller.appspotmail.com

------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 1 PID: 5276 at kernel/locking/lockdep.c:232 hlock_class kernel/locking/lockdep.c:232 [inline]
WARNING: CPU: 1 PID: 5276 at kernel/locking/lockdep.c:232 hlock_class+0xfa/0x130 kernel/locking/lockdep.c:221
Modules linked in:
CPU: 1 UID: 0 PID: 5276 Comm: kworker/1:4 Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: wg-crypt-wg2 wg_packet_encrypt_worker
RIP: 0010:hlock_class kernel/locking/lockdep.c:232 [inline]
RIP: 0010:hlock_class+0xfa/0x130 kernel/locking/lockdep.c:221
Code: b6 14 11 38 d0 7c 04 84 d2 75 43 8b 05 73 a9 f5 0e 85 c0 75 19 90 48 c7 c6 40 d5 6c 8b 48 c7 c7 60 cf 6c 8b e8 57 b2 e4 ff 90 <0f> 0b 90 90 90 31 c0 eb 9e e8 78 38 85 00 e9 1c ff ff ff 48 c7 c7
RSP: 0018:ffffc90004437960 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 00000000000012ae RCX: ffffffff814e71a9
RDX: ffff88806302da00 RSI: ffffffff814e71b6 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88806302e530 R14: 00000000000012ae R15: ffff88806302da00
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020021000 CR3: 000000003167e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 check_wait_context kernel/locking/lockdep.c:4826 [inline]
 __lock_acquire+0x415/0x3ce0 kernel/locking/lockdep.c:5152
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
 _raw_spin_lock_bh+0x33/0x40 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_encrypt_worker+0xe4/0xd60 drivers/net/wireguard/send.c:293
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>


---
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