af_alg: Reorder resource release to avoid use-after-free

Fixes: 206516e8c2bd ("af_alg: Crypto wrappers for Linux kernel crypto (AF_ALG)")
Signed-off-by: Tim Small <tim@seoss.co.uk>

diff --git a/src/crypto/crypto_linux.c b/src/crypto/crypto_linux.c
index 9278e279795f791a33bdbede078137a2dd5d6808..5d4f6be9324ee2a389397de64447481932050435 100644 (file)
--- a/src/crypto/crypto_linux.c
+++ b/src/crypto/crypto_linux.c
@@ -363,8 +363,8 @@ int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len)
        }
 
        if (*len < ctx->mac_len) {
-               crypto_hash_deinit(ctx);
                *len = ctx->mac_len;
+               crypto_hash_deinit(ctx);
                return -1;
        }
        *len = ctx->mac_len;