linux-kernel - Re: possible double call of kfree_skb in net/llc/llc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <84144f020805262320k5740cd25lf16d7838d5358f0b@mail.gmail.com>
Date:	Tue, 27 May 2008 09:20:06 +0300
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Patrick McHardy" <kaber@...sh.net>
Cc:	"Dmitry Petukhov" <dmgenp@...il.com>, linux-kernel@...r.kernel.org,
	"Linux Netdev List" <netdev@...r.kernel.org>
Subject: Re: possible double call of kfree_skb in net/llc/llc_sap.c

Dmitry Petukhov wrote:
>> In the file  net/llc/llc_sap.c, funcion llc_sap_state_process,
>> the call to kfree_skb in the line 227 can proceed even if skb was already
>> freed
>> on line 218, or  224, or queued to the user within sock_queue_rcv_skb
>> function.
>> Obviously return statement is missing after line 225.
>>
>> This problem was found by Alex Shevkov.

On Tue, May 27, 2008 at 9:16 AM, Patrick McHardy <kaber@...sh.net> wrote:
> Could you send a patch please?

I wonder how the code got in that shape but it's probably best to just
remove the extra kfree_skb() calls and do it unconditionally at the
end of the function.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/