linux-kernel - Re: [syzbot] WARNING in batadv_v_ogm

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Message-ID: <e4922538-1a57-1d21-9079-e954d742d844@gmail.com>
Date:   Wed, 27 Oct 2021 14:57:20 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     syzbot <syzbot+b6a62d5cb9fe05a0e3a3@...kaller.appspotmail.com>,
        a@...table.cc, b.a.t.m.a.n@...ts.open-mesh.org,
        davem@...emloft.net, kuba@...nel.org, linux-kernel@...r.kernel.org,
        mareklindner@...mailbox.ch, netdev@...r.kernel.org,
        sven@...fation.org, sw@...onwunderlich.de,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] WARNING in batadv_v_ogm_free

On 10/22/21 02:19, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    2f111a6fd5b5 Merge tag 'ceph-for-5.15-rc7' of git://github..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=121d909f300000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=d95853dad8472c91
> dashboard link: https://syzkaller.appspot.com/bug?extid=b6a62d5cb9fe05a0e3a3
> compiler:       Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2
> 
> Unfortunately, I don't have any reproducer for this issue yet.
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+b6a62d5cb9fe05a0e3a3@...kaller.appspotmail.com
> 

Looks like bug on error handling path in batadv_mesh_init(). Must be 
fixed by my batman-adv patch.

#syz fix: net: batman-adv: fix error handling




With regards,
Pavel Skripkin