From: Ondrej Mosnáček <omosnacek@gmail.com>
Date: Fri, 23 Sep 2016 08:47:32 +0000 (+0200)
Subject: crypto: gcm - Fix IV buffer size in crypto_gcm_setkey
X-Git-Tag: v3.2.85~86
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=35a6ba636bbf1ba8cbf9476c5e02460592a7fef9;p=pandora-kernel.git

crypto: gcm - Fix IV buffer size in crypto_gcm_setkey

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: Ben Hutchings <ben@decadent.org.uk>
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