From: Eric Biggers ebiggers@google.com

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

diff --git a/arch/x86/crypto/cast5_avx_glue.c b/arch/x86/crypto/cast5_avx_glue.c index dbea6020ffe7d..575292a33bdf2 100644 --- 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_desc *desc, struct blkcipher_walk *walk, 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_desc *desc, struct blkcipher_walk *walk,

/* 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);