On Wed, Apr 15, 2020 at 01:03:39PM +0200, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9fc06ff56845cc5ccafec52f545fc2e08d22f849 Mon Sep 17 00:00:00 2001
From: Nikos Tsironis <ntsironis@xxxxxxxxxxx>
Date: Fri, 27 Mar 2020 16:01:10 +0200
Subject: [PATCH] dm clone: Add missing casts to prevent overflows and data
corruption
Add missing casts when converting from regions to sectors.
In case BITS_PER_LONG == 32, the lack of the appropriate casts can lead
to overflows and miscalculation of the device sector.
As a result, we could end up discarding and/or copying the wrong parts
of the device, thus corrupting the device's data.
Fixes: 7431b7835f55 ("dm: add clone target")
Cc: stable@xxxxxxxxxxxxxxx # v5.4+
Signed-off-by: Nikos Tsironis <ntsironis@xxxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Looks like addressing the other dm patches made this one apply/build as
well.
--
Thanks,
Sasha
