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]

Date:   Fri, 22 Feb 2019 13:23:36 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        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 02:23:30PM -0800, Andi Kleen wrote:
> 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.

right, will do

jirka