From 50d2e6dc1f83db0563c7d6603967bf9585ce934b Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ondrej=20Mosn=C3=A1=C4=8Dek?= Date: Fri, 23 Sep 2016 10:47:32 +0200 Subject: [PATCH] crypto: gcm - Fix IV buffer size in crypto_gcm_setkey 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 Signed-off-by: Herbert Xu --- crypto/gcm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/gcm.c b/crypto/gcm.c index 70a892e87ccb..f624ac98c94e 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_skcipher *ctr = ctx->ctr; struct { be128 hash; - u8 iv[8]; + u8 iv[16]; struct crypto_gcm_setkey_result result; -- 2.11.4.GIT