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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2016-02-25 16:48:13 -0600 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-04-18 08:50:41 -0400 |
| commit | dad41d54081e1bd2ef601c702ff4ea0f7428a965 (patch) | |
| tree | 7bd3fba876491992faa5ed1d96abbdba0e396fff | |
| parent | 503f8305ab1b82d8788a2f161e7c52c0c0f6aeac (diff) | |
| download | lwn-dad41d54081e1bd2ef601c702ff4ea0f7428a965.tar.gz lwn-dad41d54081e1bd2ef601c702ff4ea0f7428a965.zip | |
crypto: ccp - memset request context to zero during import
[ Upstream commit ce0ae266feaf35930394bd770c69778e4ef03ba9 ]
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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | drivers/crypto/ccp/ccp-crypto-aes-cmac.c | 1 | ||||
| -rw-r--r-- | drivers/crypto/ccp/ccp-crypto-sha.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c index 8680b189e86c..0a4973b47c99 100644 --- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c +++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c @@ -226,6 +226,7 @@ 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 e9b199f4913a..9711b6d29162 100644 --- a/drivers/crypto/ccp/ccp-crypto-sha.c +++ b/drivers/crypto/ccp/ccp-crypto-sha.c @@ -220,6 +220,7 @@ 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; |