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authorOndrej Mosnáček <omosnacek@gmail.com>2016-09-23 10:47:32 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-10-31 04:13:59 -0600
commit5171c1660e9c0d9ed1a44ada59a45b85eb1f2ef6 (patch)
treef68b201f76311ed96dc2f74502d107f3fae0b0ab /crypto
parentb31602293c200928cf8d90c13738a90392757ac4 (diff)
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/gcm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/gcm.c b/crypto/gcm.c
index d9ea5f9c0574..1238b3c5a321 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -117,7 +117,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
struct crypto_ablkcipher *ctr = ctx->ctr;
struct {
be128 hash;
- u8 iv[8];
+ u8 iv[16];
struct crypto_gcm_setkey_result result;