This is a note to let you know that I've just added the patch titled
dm crypt: use memzero_explicit for on-stack buffer
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-crypt-use-memzero_explicit-for-on-stack-buffer.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1a71d6ffe18c0d0f03fc8531949cc8ed41d702ee Mon Sep 17 00:00:00 2001
From: Milan Broz <gmazyland@xxxxxxxxx>
Date: Sat, 22 Nov 2014 09:36:04 +0100
Subject: dm crypt: use memzero_explicit for on-stack buffer
From: Milan Broz <gmazyland@xxxxxxxxx>
commit 1a71d6ffe18c0d0f03fc8531949cc8ed41d702ee upstream.
Use memzero_explicit to cleanup sensitive data allocated on stack
to prevent the compiler from optimizing and removing memset() calls.
Signed-off-by: Milan Broz <gmazyland@xxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-crypt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -705,7 +705,7 @@ static int crypt_iv_tcw_whitening(struct
for (i = 0; i < ((1 << SECTOR_SHIFT) / 8); i++)
crypto_xor(data + i * 8, buf, 8);
out:
- memset(buf, 0, sizeof(buf));
+ memzero_explicit(buf, sizeof(buf));
return r;
}
Patches currently in stable-queue which might be from gmazyland@xxxxxxxxx are
queue-3.18/dm-crypt-use-memzero_explicit-for-on-stack-buffer.patch
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