linux-kernel - Re: [PATCH] execve.2: execve also returns E2BIG if a string is too long

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

Message-ID: <20231011135230.750728-1-mattlloydhouse@gmail.com>
Date:   Wed, 11 Oct 2023 09:52:22 -0400
From:   Matthew House <mattlloydhouse@...il.com>
To:     Rik van Riel <riel@...riel.com>
Cc:     Alejandro Colomar <alx@...nel.org>, linux-man@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@...a.com,
        Eric Biederman <ebiederm@...ssion.com>
Subject: Re: [PATCH] execve.2: execve also returns E2BIG if a string is too long

On Tue, Oct 10, 2023 at 11:51 PM Rik van Riel <riel@...riel.com> wrote:
> Document that if a command line or environment string is too long (> MAX_ARG_STRLEN), execve will also return E2BIG.
>
> Signed-off-by: Rik van Riel <riel@...riel.com>

It might be worth mentioning that strlen(pathname) must also be strictly
less than MAX_ARG_STRLEN, it being subject to the same restrictions as
each of the argv/envp strings.

Thank you,
Matthew House