linux-kernel - [PATCH 4.16 11/31] crypto: ccp - Fill the result buffer only on digest, finup, and final ops

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri,  6 Apr 2018 15:24:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Gary R Hook <gary.hook@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH 4.16 11/31] crypto: ccp - Fill the result buffer only on digest, finup, and final ops

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

------------------

From: Gary R Hook <gary.hook@....com>

commit 0ee991be4cdd88587aedbf68cdacd1765f57236a upstream.

Any change to the result buffer should only happen on final, finup
and digest operations. Changes to the buffer for update, import, export,
etc, are not allowed.

Fixes: 66d7b9f6175e ("crypto: testmgr - test misuse of result in ahash")
Signed-off-by: Gary R Hook <gary.hook@....com>
Cc: <stable@...r.kernel.org>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
+++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
@@ -46,7 +46,7 @@ static int ccp_aes_cmac_complete(struct
 	}
 
 	/* Update result area if supplied */
-	if (req->result)
+	if (req->result && rctx->final)
 		memcpy(req->result, rctx->iv, digest_size);
 
 e_free:
--- a/drivers/crypto/ccp/ccp-crypto-sha.c
+++ b/drivers/crypto/ccp/ccp-crypto-sha.c
@@ -47,7 +47,7 @@ static int ccp_sha_complete(struct crypt
 	}
 
 	/* Update result area if supplied */
-	if (req->result)
+	if (req->result && rctx->final)
 		memcpy(req->result, rctx->ctx, digest_size);
 
 e_free: