crypto: ghash-clmulni: specify context size for ghash async algorithm

Currently context size (cra_ctxsize) doesn't specified for
ghash_async_alg. Which means it's zero. Thus crypto_create_tfm()
doesn't allocate needed space for ghash_async_ctx, so any
read/write to ctx (e.g. in ghash_async_init_tfm()) is not valid.

Cc: stable@vger.kernel.org
Signed-off-by: Andrey Ryabinin <aryabinin@odin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/x86/crypto/ghash-clmulni-intel_glue.c b/arch/x86/crypto/ghash-clmulni-intel_glue.c
index 64d7cf1b50e1..440df0c7a2ee 100644
--- a/arch/x86/crypto/ghash-clmulni-intel_glue.c
+++ b/arch/x86/crypto/ghash-clmulni-intel_glue.c
@@ -294,6 +294,7 @@ static struct ahash_alg ghash_async_alg = {
                         .cra_name               = "ghash",
                         .cra_driver_name        = "ghash-clmulni",
                         .cra_priority           = 400,
+                        .cra_ctxsize            = sizeof(struct ghash_async_ctx),
                         .cra_flags              = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
                         .cra_blocksize          = GHASH_BLOCK_SIZE,
                         .cra_type               = &crypto_ahash_type,