linux-kernel - Re: [PATCH] ovl: fix null pointer dereference on ofs allocation failure.

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Message-ID: <CAOssrKfZ3Bt4n87JOh=N-3X3XY8J1aBL7rFNG9u2efk41nAqiA@mail.gmail.com>
Date:   Fri, 10 Nov 2017 09:54:48 +0100
From:   Miklos Szeredi <mszeredi@...hat.com>
To:     Colin King <colin.king@...onical.com>
Cc:     overlayfs <linux-unionfs@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ovl: fix null pointer dereference on ofs allocation failure.

On Thu, Nov 9, 2017 at 6:47 PM, Colin King <colin.king@...onical.com> wrote:
> From: Colin Ian King <colin.king@...onical.com>
>
> The current error exit path when ofs fails to allocate jumps
> to clean-up code that calls ovl_free_fs resulting in a null pointer
> dereference on the null ovl pointer.  Fix this by simply returning
> with the -ENOMEM status in err.
>
> Detected by CoverityScan, CID#1461284 ("Dereference after null check")


Thanks, fixed.

Miklos