This is a note to let you know that I've just added the patch titled

crypto: x86/cast5-avx - fix ECB encryption when long sg follows short one

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: crypto-x86-cast5-avx-fix-ecb-encryption-when-long-sg-follows-short-one.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 8f461b1e02ed546fbd0f11611138da67fd85a30f Mon Sep 17 00:00:00 2001

From: Eric Biggers ebiggers@google.com Date: Mon, 19 Feb 2018 23:48:12 -0800 Subject: crypto: x86/cast5-avx - fix ECB encryption when long sg follows short one

From: Eric Biggers ebiggers@google.com

commit 8f461b1e02ed546fbd0f11611138da67fd85a30f upstream.

With ecb-cast5-avx, if a 128+ byte scatterlist element followed a shorter one, then the algorithm accidentally encrypted/decrypted only 8 bytes instead of the expected 128 bytes. Fix it by setting the encryption/decryption 'fn' correctly.

Fixes: c12ab20b162c ("crypto: cast5/avx - avoid using temporary stack buffers") Cc: stable@vger.kernel.org # v3.8+ Signed-off-by: Eric Biggers ebiggers@google.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/crypto/cast5_avx_glue.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/x86/crypto/cast5_avx_glue.c +++ b/arch/x86/crypto/cast5_avx_glue.c @@ -66,8 +66,6 @@ static int ecb_crypt(struct blkcipher_de void (*fn)(struct cast5_ctx *ctx, u8 *dst, const u8 *src); int err;

- fn = (enc) ? cast5_ecb_enc_16way : cast5_ecb_dec_16way; - err = blkcipher_walk_virt(desc, walk); desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

@@ -79,6 +77,7 @@ static int ecb_crypt(struct blkcipher_de

/* Process multi-block batch */ if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) { + fn = (enc) ? cast5_ecb_enc_16way : cast5_ecb_dec_16way; do { fn(ctx, wdst, wsrc);

Patches currently in stable-queue which might be from ebiggers@google.com are

queue-4.15/crypto-x86-cast5-avx-fix-ecb-encryption-when-long-sg-follows-short-one.patch