Re: [stable][PATCH < 2.6.19] Fix data corruption with dm-crypt over RAID5

[Chris Wright]

[Note: please Cc: stable@xxxxxxxxxx on -stable patches]

* Christophe Saout (christophe@xxxxxxxx) wrote:
> Fix corruption issue with dm-crypt on top of software raid5. Cancelled
> readahead bio's that report no error, just have BIO_UPTODATE cleared
> were reported as successful reads to the higher layers (and leaving
> random content in the buffer cache). Already fixed in 2.6.19.

I take it this is fixed a different way in 2.6.19?  Mind clarifying the
difference?

> Signed-off-by: Christophe Saout <christophe@xxxxxxxx>
> 
> 
> --- linux-2.6.18.orig/drivers/md/dm-crypt.c	2006-09-20 05:42:06.000000000 +0200
> +++ linux-2.6.18/drivers/md/dm-crypt.c	2006-12-02 03:03:36.000000000 +0100
> @@ -717,13 +717,15 @@
>  	if (bio->bi_size)
>  		return 1;
>  
> +	if (!bio_flagged(bio, BIO_UPTODATE) && !error)
> +		error = -EIO;
> +                        

Minor nit:  introduces trailing whitespaces, cleaned it up locally.

thanks,
-chris
--

This is a note to let you know that we have just queued up the patch titled

    Subject: dm crypt: Fix data corruption with dm-crypt over RAID5

to the 2.6.18-stable tree.  Its filename is

    dm-crypt-fix-data-corruption-with-dm-crypt-over-raid5.patch

A git repo of this tree can be found at 
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary