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R. Silva" To: Corentin Labbe , Herbert Xu , "David S. Miller" , Maxime Ripard , Chen-Yu Tsai Subject: [PATCH][next] crypto: sun8i-ss - Fix memory leak in sun8i_ss_prng_generate() Message-ID: <20200928175945.GA11320@embeddedor> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200928_135408_602803_224BD1B7 X-CRM114-Status: GOOD ( 14.24 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Gustavo A. R. Silva" , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Set _err_ to the return error code -EFAULT before jumping to the new label err_d, so resources for _d_ can be released before returning from function sun8i_ss_prng_generate(). Addresses-Coverity-ID: 1497459 ("Resource leak") Fixes: ac2614d721de ("crypto: sun8i-ss - Add support for the PRNG") Signed-off-by: Gustavo A. R. Silva --- drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c index 08a1473b2145..0573f6289e8b 100644 --- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c +++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c @@ -103,7 +103,8 @@ int sun8i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, dma_iv = dma_map_single(ss->dev, ctx->seed, ctx->slen, DMA_TO_DEVICE); if (dma_mapping_error(ss->dev, dma_iv)) { dev_err(ss->dev, "Cannot DMA MAP IV\n"); - return -EFAULT; + err = -EFAULT; + goto err_d; } dma_dst = dma_map_single(ss->dev, d, todo, DMA_FROM_DEVICE); @@ -160,7 +161,7 @@ int sun8i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, dma_unmap_single(ss->dev, dma_dst, todo, DMA_FROM_DEVICE); err_iv: dma_unmap_single(ss->dev, dma_iv, ctx->slen, DMA_TO_DEVICE); - +err_d: if (!err) { memcpy(dst, d, dlen); /* Update seed */ -- 2.27.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel