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Date: Fri, 1 Apr 2016 17:52:12 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Tom Lendacky <thomas.lendacky@....com>, Herbert Xu <herbert@...dor.apana.org.au>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.19.y-ckt 046/170] crypto: ccp - memset request context to zero during import 3.19.8-ckt18 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Tom Lendacky <thomas.lendacky@....com> commit ce0ae266feaf35930394bd770c69778e4ef03ba9 upstream. 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(). Signed-off-by: Tom Lendacky <thomas.lendacky@....com> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- drivers/crypto/ccp/ccp-crypto-aes-cmac.c | 1 + drivers/crypto/ccp/ccp-crypto-sha.c | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c index bc19c1e..5c93afb 100644 --- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c +++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c @@ -225,6 +225,7 @@ 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; diff --git a/drivers/crypto/ccp/ccp-crypto-sha.c b/drivers/crypto/ccp/ccp-crypto-sha.c index db6ebd9..b368e98 100644 --- a/drivers/crypto/ccp/ccp-crypto-sha.c +++ b/drivers/crypto/ccp/ccp-crypto-sha.c @@ -219,6 +219,7 @@ 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; -- 2.7.4
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