linux-kernel - Re: Intercepting system calls

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: <CAFLxGvyWWCAfk-fCCc3NhCE=KbE-Y7ivO5gynSbCubxPC8d-uw@mail.gmail.com>
Date:	Thu, 22 Dec 2011 17:42:40 +0100
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	Gaurav Saxena <grvsaxena419@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Intercepting system calls

On Thu, Dec 22, 2011 at 5:07 PM, Gaurav Saxena <grvsaxena419@...il.com> wrote:
> Hello all,
>
> I am writing an application for which I need to intercept some
> filesystem system calls eg. unlink. I need unlink to call my code
> before deleting abc so that I could probably prevent unlink . I would
> like to implement this in a kernel module instead of modifying kernel
> code itself. I would like to intercept system calls by replacing
> system calls but I have not been able to find any method of doing that
> in linux > 3.0. Please suggest some method of doing that.
>

Intercepting system calls is very bad, don't do it.

-- 
Thanks,
//richard
--
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/