linux-kernel - Re: [PATCH] Fixup: perf bench: Fix two memory leaks detected with ASan

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:   Sat, 20 Nov 2021 08:08:31 +0100
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Sohaib Mohamed <sohaib.amhmd@...il.com>, jolsa@...hat.com
Cc:     acme@...nel.org, irogers@...gle.com, jolsa@...nel.org,
        linux-kernel@...r.kernel.org, namhyung@...nel.org,
        songliubraving@...com
Subject: Re: [PATCH] Fixup: perf bench: Fix two memory leaks detected with
 ASan

On 20.11.21 07:53, Ahmad Fatoum wrote:
>> +	snd_ctx_arr[total_counter] = snd_ctx;
> 
> You are storing at snd_ctx_arr[num_fd] each time, so you will leak
> all context, except for the last one.

Oh, it's more subtle than that. total_counter is of course incremented
every time in the previous loop, so you will have num_fd times NULL
(from static initialization) then a pointer to an allocation and so on.
That works by the looks of it, but looks quite strange.


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |