linux-kernel - Re: [PATCHv4] fixed resource leak in scripts/mod/modpost.c

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Message-ID: <AANLkTinCzXCAfrQ46N-AQAUVS_N4kT=p58b6GZR1AL47@mail.gmail.com>
Date:	Tue, 10 Aug 2010 15:21:01 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Alexey Fomenko <ext-alexey.fomenko@...ia.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Trevor Keith <tsrk@...k.net>,
	Rusty Russell <rusty@...tcorp.com.au>,
	ext Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCHv4] fixed resource leak in scripts/mod/modpost.c

On Tue, Aug 10, 2010 at 3:03 PM, Alexey Fomenko
<ext-alexey.fomenko@...ia.com> wrote:
> From: Alexey Fomenko <ext-alexey.fomenko@...ia.com>
>
> sec2annotation() returns malloc'ed buffer directly to printf as an
> argument. Patch lets free this buffer after printing. Preventing ops
> while freeing the buffer by changing return const str to return
> strdup empty line.
>
> Signed-off-by: Alexey Fomenko <ext-alexey.fomenko@...ia.com>

> @@ -1283,11 +1301,15 @@
>                "uses functionality in the exit path.\n"
>                "The fix is often to remove the %sannotation of\n"
>                "%s%s so it may be used outside an exit section.\n",
> -               from, sec2annotation(fromsec), fromsym, from_p,
> -               to, sec2annotation(tosec), tosym, to_p,
> -               sec2annotation(tosec), tosym, to_p);
> +               from, prl_from, fromsym, from_p,
> +               to, prl_to, tosym, to_p,
> +               ptl_to, tosym, to_p);
Did you ever compile this code?
It looks typo here.

> +               free(prl_from);
> +               free(prl_to);
>                break;
>        case ANY_EXIT_TO_ANY_INIT:
> +               prl_from = sec2annotation(fromsec);
> +               prl_to = sec2annotation(tosec);
>                fprintf(stderr,
>                "The %s %s%s%s references\n"
>                "a %s %s%s%s.\n"

-- 
With Best Regards,
Andy Shevchenko
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