linux-kernel - Re: [PATCH v2] perf tests: Fix out of bounds memory access

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: <20191107102029.GA32679@leoy-ThinkPad-X240s>
Date:   Thu, 7 Nov 2019 18:20:29 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org,
        Naresh Kamboju <naresh.kamboju@...aro.org>
Subject: Re: [PATCH v2] perf tests: Fix out of bounds memory access

On Thu, Nov 07, 2019 at 10:42:26AM +0100, Jiri Olsa wrote:

[...]

> > To fix this issue, we will use evlist__open() and evlist__close() pair
> > functions to prepare and cleanup context for evlist; so 'evsel->id' and
> > 'evsel->ids' can be initialized properly when invoke do_test() and avoid
> > the out of bounds memory access.
> 
> right, we need to solve this on libperf level, so it's possible
> to call mmap/munmap multiple time without close/open.. I'll try
> to send something, but meanwhile this is good workaround
> 
> Reviewed-by: Jiri Olsa <jolsa@...nel.org>

Thanks for reviewing, Jiri.

You are welcome to send us the fixing patches, I am glad to test it on
qemu_arm.

Thanks,
Leo Yan