[PATCH 3.16.y-ckt 071/133] crypto: ghash-clmulni: specify context size for ghash async algorithm

From: Luis Henriques
Date: Wed Sep 30 2015 - 06:16:07 EST

3.16.7-ckt18 -stable review patch. If anyone has any objections, please let me know.


From: Andrey Ryabinin <aryabinin@xxxxxxxx>

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@xxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
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 8253d85aa165..de1d72e3ec59 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_blocksize = GHASH_BLOCK_SIZE,
.cra_type = &crypto_ahash_type,
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