Commit 9c1ea6c6 authored by Ondrej Mosnáček's avatar Ondrej Mosnáček Committed by Greg Kroah-Hartman

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 avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1b1e27ab
...@@ -117,7 +117,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key, ...@@ -117,7 +117,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
struct crypto_skcipher *ctr = ctx->ctr; struct crypto_skcipher *ctr = ctx->ctr;
struct { struct {
be128 hash; be128 hash;
u8 iv[8]; u8 iv[16];
struct crypto_gcm_setkey_result result; struct crypto_gcm_setkey_result result;
......
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