linux-kernel - [PATCH 4.18 18/22] crypto: skcipher - fix aligning block size in skcipher_copy

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Message-Id: <20180816171557.234832609@linuxfoundation.org>
Date:   Thu, 16 Aug 2018 20:45:34 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eric Biggers <ebiggers@...gle.com>,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH 4.18 18/22] crypto: skcipher - fix aligning block size in skcipher_copy_iv()

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Biggers <ebiggers@...gle.com>

commit 0567fc9e90b9b1c8dbce8a5468758e6206744d4a upstream.

The ALIGN() macro needs to be passed the alignment, not the alignmask
(which is the alignment minus 1).

Fixes: b286d8b1a690 ("crypto: skcipher - Add skcipher walk interface")
Cc: <stable@...r.kernel.org> # v4.10+
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 crypto/skcipher.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -399,7 +399,7 @@ static int skcipher_copy_iv(struct skcip
 	unsigned size;
 	u8 *iv;
 
-	aligned_bs = ALIGN(bs, alignmask);
+	aligned_bs = ALIGN(bs, alignmask + 1);
 
 	/* Minimum size to align buffer by alignmask. */
 	size = alignmask & ~a;