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@xxxxxxxxxxxxxxx> know about it.
>From 50d2e6dc1f83db0563c7d6603967bf9585ce934b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ondrej=20Mosn=C3=A1=C4=8Dek?= <omosnacek@xxxxxxxxx>
Date: Fri, 23 Sep 2016 10:47:32 +0200
Subject: crypto: gcm - Fix IV buffer size in crypto_gcm_setkey
From: Ondrej Mosnáček <omosnacek@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxx are
queue-4.8/crypto-gcm-fix-iv-buffer-size-in-crypto_gcm_setkey.patch
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