Patch "crypto: ccp - Prevent information leakage on export" has been added to the 4.5-stable tree

This is a note to let you know that I've just added the patch titled

crypto: ccp - Prevent information leakage on export

to the 4.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
crypto-ccp-prevent-information-leakage-on-export.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Tom Lendacky <[email protected]>
Date: Wed, 13 Apr 2016 10:52:25 -0500
Subject: crypto: ccp - Prevent information leakage on export

From: Tom Lendacky <[email protected]>

commit f709b45ec461b548c41a00044dba1f1b572783bf upstream.

Prevent information from leaking to userspace by doing a memset to 0 of the export state structure before setting the structure values and copying it. This prevents un-initialized padding areas from being copied into the export area.

---
 drivers/crypto/ccp/ccp-crypto-aes-cmac.c |    3 +++
 drivers/crypto/ccp/ccp-crypto-sha.c      |    3 +++
 2 files changed, 6 insertions(+)

@@ -225,6 +225,9 @@ static int ccp_aes_cmac_export(struct ah
 	struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req);
 	struct ccp_aes_cmac_exp_ctx state;
 
+	/* Don't let anything leak to 'out' */
+	memset(&state, 0, sizeof(state));
+
 	state.null_msg = rctx->null_msg;
 	memcpy(state.iv, rctx->iv, sizeof(state.iv));
 	state.buf_count = rctx->buf_count;

@@ -212,6 +212,9 @@ static int ccp_sha_export(struct ahash_r
 	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
 	struct ccp_sha_exp_ctx state;
 
+	/* Don't let anything leak to 'out' */
+	memset(&state, 0, sizeof(state));
+
 	state.type = rctx->type;
 	state.msg_bits = rctx->msg_bits;
 	state.first = rctx->first;

Patches currently in stable-queue which might be from [email protected] are

queue-4.5/crypto-ccp-prevent-information-leakage-on-export.patch