Commit 83bffee1 authored by Ondrej Mosnáček's avatar Ondrej Mosnáček Committed by Jiri Slaby

crypto: gcm - Fix IV buffer size in crypto_gcm_setkey

commit 50d2e6dc 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: 84c91152 ("[CRYPTO] gcm: Add support for async ciphers")
Signed-off-by: default avatarOndrej Mosnacek <omosnacek@gmail.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent a5177e00
......@@ -109,7 +109,7 @@ 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;
......
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