linux-kernel - Re: [syzbot] [net?] possible deadlock in ipv6_sock_ac

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Message-ID: <67f208ea.050a0220.0a13.025b.GAE@google.com>
Date: Sat, 05 Apr 2025 21:54:02 -0700
From: syzbot <syzbot+be6f4b383534d88989f7@...kaller.appspotmail.com>
To: davem@...emloft.net, dsahern@...nel.org, edumazet@...gle.com, 
	horms@...nel.org, kuba@...nel.org, kuniyu@...zon.com, 
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] possible deadlock in ipv6_sock_ac_close (4)

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
unregister_netdevice: waiting for DEV to become free

unregister_netdevice: waiting for batadv0 to become free. Usage count = 3

Tested on:

commit:         f4d2ef48 Merge tag 'kbuild-v6.15' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10325b4c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f2054704dd53fb80
dashboard link: https://syzkaller.appspot.com/bug?extid=be6f4b383534d88989f7
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=145f87e4580000