linux-ext4 - Re: [PATCH 2/2] ext4: Check for directory entries too close to block end

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Message-ID: <20191209004209.GB9343@mit.edu>
Date:   Sun, 8 Dec 2019 19:42:09 -0500
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Jan Kara <jack@...e.cz>
Cc:     linux-ext4@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 2/2] ext4: Check for directory entries too close to block
 end

On Mon, Dec 02, 2019 at 06:02:13PM +0100, Jan Kara wrote:
> ext4_check_dir_entry() currently does not catch a case when a directory
> entry ends so close to the block end that the header of the next
> directory entry would not fit in the remaining space. This can lead to
> directory iteration code trying to access address beyond end of current
> buffer head leading to oops.
> 
> CC: stable@...r.kernel.org
> Signed-off-by: Jan Kara <jack@...e.cz>

Thanks, applied.

						- Ted