linux-kernel - Re: [PATCH][next] smack: fix two memory leaks in smack_add

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Message-ID: <20181222193432.GC2217@ZenIV.linux.org.uk>
Date:   Sat, 22 Dec 2018 19:34:32 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Colin King <colin.king@...onical.com>
Cc:     Casey Schaufler <casey@...aufler-ca.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E . Hallyn" <serge@...lyn.com>,
        linux-security-module@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] smack: fix two memory leaks in smack_add_opt

On Sat, Dec 22, 2018 at 12:27:50PM +0000, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently if s is null or when returning via the error exit label
> out_opt_err leaks of the allocated opts can occur. Fix the leak
> on the null s case by checking s is null before the allocation. Fix
> the leak on the exit path by checking if opts was allocated by
> kfree'ing opts.
> 
> Detected by CoverityScan, CID#1475953 ("Resource leak")
> 
> Fixes: b2130173efae ("smack: take the guts of smack_parse_opts_str() into a new helper")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

There's a better fix in local tree, will go into -next tonight.