From: Christophe Leroy christophe.leroy@c-s.fr
commit ee483d32ee1a1a7f7d7e918fbc350c790a5af64a upstream.
When data size is not a multiple of the alg's block size, the SEC generates an error interrupt and dumps the registers. And for NULL size, the SEC does just nothing and the interrupt is awaited forever.
This patch ensures the data size is correct before submitting the request to the SEC engine.
Signed-off-by: Christophe Leroy christophe.leroy@c-s.fr Fixes: 4de9d0b547b9 ("crypto: talitos - Add ablkcipher algorithms") Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/crypto/talitos.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
--- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -1672,6 +1672,14 @@ static int ablkcipher_encrypt(struct abl struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); struct talitos_edesc *edesc; + unsigned int blocksize = + crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(cipher)); + + if (!areq->nbytes) + return 0; + + if (areq->nbytes % blocksize) + return -EINVAL;
/* allocate extended descriptor */ edesc = ablkcipher_edesc_alloc(areq, true); @@ -1689,6 +1697,14 @@ static int ablkcipher_decrypt(struct abl struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); struct talitos_edesc *edesc; + unsigned int blocksize = + crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(cipher)); + + if (!areq->nbytes) + return 0; + + if (areq->nbytes % blocksize) + return -EINVAL;
/* allocate extended descriptor */ edesc = ablkcipher_edesc_alloc(areq, false);