linux-ext4 - Re: [PATCH 2/3] ext4: fix potential race between s_group

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Message-ID: <20200220051308.GF476845@mit.edu>
Date:   Thu, 20 Feb 2020 00:13:08 -0500
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Suraj Jitindar Singh <surajjs@...zon.com>
Cc:     linux-ext4@...r.kernel.org, sblbir@...zon.com,
        sjitindarsingh@...il.com, stable@...r.kernel.org
Subject: Re: [PATCH 2/3] ext4: fix potential race between s_group_info online
 resizing and access

On Tue, Feb 18, 2020 at 07:08:50PM -0800, Suraj Jitindar Singh wrote:
> During an online resize an array of pointers to s_group_info gets replaced
> so it can get enlarged. If there is a concurrent access to the array in
> ext4_get_group_info() and this memory has been reused then this can lead to
> an invalid memory access.
> 
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=206443
> Signed-off-by: Suraj Jitindar Singh <surajjs@...zon.com>
> Cc: stable@...r.kernel.org

Thanks, applied.

					- Ted