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Message-ID: <5e29e63c-d2b5-ae72-0e33-5a22e727be3c@gmail.com>
Date:   Fri, 22 Oct 2021 23:58:15 +0300
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Subject: Re: [syzbot] WARNING in batadv_nc_mesh_free
Content-Language: en-US
From:   Pavel Skripkin <paskripkin@gmail.com>
To:     syzbot <syzbot+28b0702ada0bf7381f58@syzkaller.appspotmail.com>,
        a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org,
        davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org,
        mareklindner@neomailbox.ch, netdev@vger.kernel.org,
        sven@narfation.org, sw@simonwunderlich.de,
        syzkaller-bugs@googlegroups.com
References: <000000000000c87fbd05cef6bcb0@google.com>
 <1639fcba-e543-e071-f17c-941b8c7a948f@gmail.com>
In-Reply-To: <1639fcba-e543-e071-f17c-941b8c7a948f@gmail.com>
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On 10/22/21 23:57, Pavel Skripkin wrote:
> On 10/22/21 23:20, syzbot wrote:
>> Hello,
>> 
>> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
>> general protection fault in batadv_nc_purge_paths
> 
> 
> Oh, ok. Next clean up call in batadv_nc_mesh_free() caused GPF, since
> fields are not initialized. Let's try to clean up one by one and do not
> break dependencies.
> 
> Quite ugly one, but idea is correct, I guess
> 
> Also, make each *_init() call clean up all allocated stuff to not call
> corresponding *_free() on error handling path, since it introduces
> problems, as syzbot reported
> 
> 
> 
> 

Whooops.... Forgot to ask syzbot to test the patch

#syz test
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master


With regards,
Pavel Skripkin
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