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[PATCH 3.12 22/84] crypto: ghash-clmulni: specify context size for ghash async algorithm

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  [PATCH 3.12 22/84] crypto: ghash-clmulni: specify context size for ghash async algorithm Jiri Slaby <jslaby@suse.cz> - 2015-10-02 15:50 +0200

#1238268 — [PATCH 3.12 22/84] crypto: ghash-clmulni: specify context size for ghash async algorithm

From: Andrey Ryabinin <aryabinin@odin.com>

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

===============

commit 71c6da846be478a61556717ef1ee1cea91f5d6a8 upstream.

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.

Signed-off-by: Andrey Ryabinin <aryabinin@odin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/x86/crypto/ghash-clmulni-intel_glue.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/crypto/ghash-clmulni-intel_glue.c b/arch/x86/crypto/ghash-clmulni-intel_glue.c
index a8d6f69f92a3..4bcf841e4701 100644
--- a/arch/x86/crypto/ghash-clmulni-intel_glue.c
+++ b/arch/x86/crypto/ghash-clmulni-intel_glue.c
@@ -291,6 +291,7 @@ 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,
-- 
2.6.0

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