linux-kernel - Re: [PATCH 04/17] perf data: Fail check

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: <20190221222330.GD16922@tassilo.jf.intel.com>
Date:   Thu, 21 Feb 2019 14:23:30 -0800
From:   Andi Kleen <ak@...ux.intel.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Stephane Eranian <eranian@...gle.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>
Subject: Re: [PATCH 04/17] perf data: Fail check_backup in case of error

On Thu, Feb 21, 2019 at 10:41:32AM +0100, Jiri Olsa wrote:
> And display the error message from removing
> the old data file:
> 
>   $ perf record ls
>   Can't remove old data: Permission denied (perf.data.old)
>   Perf session creation failed.
> 
> Not sure how to make fail the rename (after we successfully
> remove the destination file/dir) to show the message,
> anyway let's have it there.

The use of rm_rf is really scary. So I simple command line typo could turn
this into rm -rf / ? 

Please add some sanity checks to not remove multiple levels,
and only remove files which look like they are generated
by perf.

-Andi