Patch "crypto: gcm - Fix IV buffer size in crypto_gcm_setkey" has been added to the 4.8-stable tree

Patch "crypto: gcm - Fix IV buffer size in crypto_gcm_setkey" has been added to the 4.8-stable tree

[gregkh]

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

    crypto: gcm - Fix IV buffer size in crypto_gcm_setkey

to the 4.8-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-gcm-fix-iv-buffer-size-in-crypto_gcm_setkey.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 50d2e6dc1f83db0563c7d6603967bf9585ce934b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ondrej=20Mosn=C3=A1=C4=8Dek?= <omosnacek@gmail.com>
Date: Fri, 23 Sep 2016 10:47:32 +0200
Subject: crypto: gcm - Fix IV buffer size in crypto_gcm_setkey

From: Ondrej Mosnáček <omosnacek@gmail.com>

commit 50d2e6dc1f83db0563c7d6603967bf9585ce934b upstream.

The cipher block size for GCM is 16 bytes, and thus the CTR transform
used in crypto_gcm_setkey() will also expect a 16-byte IV. However,
the code currently reserves only 8 bytes for the IV, causing
an out-of-bounds access in the CTR transform. This patch fixes
the issue by setting the size of the IV buffer to 16 bytes.

Fixes: 84c911523020 ("[CRYPTO] gcm: Add support for async ciphers")
Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 crypto/gcm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -117,7 +117,7 @@ static int crypto_gcm_setkey(struct cryp
 	struct crypto_skcipher *ctr = ctx->ctr;
 	struct {
 		be128 hash;
-		u8 iv[8];
+		u8 iv[16];
 
 		struct crypto_gcm_setkey_result result;
 


Patches currently in stable-queue which might be from omosnacek@gmail.com are

queue-4.8/crypto-gcm-fix-iv-buffer-size-in-crypto_gcm_setkey.patch