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crypto: avoid leak of ctx when bad cipher mode is given

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Fixes: Coverity CID 1546884
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
(cherry picked from commit 586ac2c67d)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Daniel P. Berrangé 2024-06-10 10:26:18 +01:00 • committed by Michael Tokarev
parent 5210593214
commit 0adc1ff8c7
1 changed files with 5 additions and 2 deletions
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7
crypto/cipher-nettle.c.inc
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@ -734,16 +734,19 @@ static QCryptoCipher *qcrypto_cipher_ctx_new(QCryptoCipherAlgorithm alg,
#ifdef CONFIG_CRYPTO_SM4 #ifdef CONFIG_CRYPTO_SM4
case QCRYPTO_CIPHER_ALG_SM4: case QCRYPTO_CIPHER_ALG_SM4:
{ {
QCryptoNettleSm4 *ctx = g_new0(QCryptoNettleSm4, 1); QCryptoNettleSm4 *ctx;
const QCryptoCipherDriver *drv;
switch (mode) { switch (mode) {
case QCRYPTO_CIPHER_MODE_ECB: case QCRYPTO_CIPHER_MODE_ECB:
ctx->base.driver = &qcrypto_nettle_sm4_driver_ecb; drv = &qcrypto_nettle_sm4_driver_ecb;
break; break;
default: default:
goto bad_cipher_mode; goto bad_cipher_mode;
} }
ctx = g_new0(QCryptoNettleSm4, 1);
ctx->base.driver = drv;
sm4_set_encrypt_key(&ctx->key[0], key); sm4_set_encrypt_key(&ctx->key[0], key);
sm4_set_decrypt_key(&ctx->key[1], key); sm4_set_decrypt_key(&ctx->key[1], key);