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crypto: ccp - memset request context to zero during import

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Since a crypto_ahash_import() can be called against a request context
that has not had a crypto_ahash_init() performed, the request context
needs to be cleared to insure there is no random data present. If not,
the random data can result in a kernel oops during crypto_ahash_update().

Cc: <stable@vger.kernel.org> # 3.14.x-
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tom Lendacky 2016-02-25 16:48:13 -06:00 committed by Herbert Xu
parent 9c6bd0c2f1
commit ce0ae266fe
2 changed files with 2 additions and 0 deletions
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1
drivers/crypto/ccp/ccp-crypto-aes-cmac.c
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@ -244,6 +244,7 @@ static int ccp_aes_cmac_import(struct ahash_request *req, const void *in)
/* 'in' may not be aligned so memcpy to local variable */
memcpy(&state, in, sizeof(state));
memset(rctx, 0, sizeof(*rctx));
rctx->null_msg = state.null_msg;
memcpy(rctx->iv, state.iv, sizeof(rctx->iv));
rctx->buf_count = state.buf_count;

1
drivers/crypto/ccp/ccp-crypto-sha.c
View File

@ -233,6 +233,7 @@ static int ccp_sha_import(struct ahash_request *req, const void *in)
/* 'in' may not be aligned so memcpy to local variable */
memcpy(&state, in, sizeof(state));
memset(rctx, 0, sizeof(*rctx));
rctx->type = state.type;
rctx->msg_bits = state.msg_bits;
rctx->first = state.first;