netdev - Re: iproute2: tc: potential buffer overflow

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Message-Id: <GDc.ZWft.5PWTByZfjjr.1TSxGQ@seznam.cz>
Date:   Sat, 07 Sep 2019 15:43:54 +0200 (CEST)
From:   <tomaspaukrt@...il.cz>
To:     "Stephen Hemminger" <stephen@...workplumber.org>
Cc:     <netdev@...r.kernel.org>
Subject: Re: iproute2: tc: potential buffer overflow

The updated patch is in the attachment.

---------- Původní e-mail ----------
Od: Stephen Hemminger <stephen@...workplumber.org>
Komu: tomaspaukrt@...il.cz
Datum: 31. 8. 2019 17:38:01
Předmět: Re: iproute2: tc: potential buffer overflow
On Sat, 31 Aug 2019 15:13:27 +0200 (CEST)
<tomaspaukrt@...il.cz> wrote:

> Hi,
> 
> there are two potentially dangerous calls of strcpy function in the program "tc". In the attachment is a patch that fixes this issue.
> 
> Tomas

This looks correct.

Please fix with strlcpy() instead; that is clearer.
Plus you can use XT_EXTENSION_MAX_NAMELEN here (optional).
View attachment "iproute2-overflow-fix.patch" of type "text/x-diff" (1076 bytes)