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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id j22sm6388221pff.42.2019.11.08.13.00.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Nov 2019 13:00:37 -0800 (PST) Date: Fri, 8 Nov 2019 13:00:36 -0800 From: Kees Cook To: Corentin Labbe Cc: davem@davemloft.net, herbert@gondor.apana.org.au, keescook+coverity-bot@chromium.org, narmstrong@baylibre.com, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] crypto: amlogic - fix two resources leak Message-ID: <201911081300.B869D22BB@keescook> References: <1573206317-9926-1-git-send-email-clabbe@baylibre.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1573206317-9926-1-git-send-email-clabbe@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 08, 2019 at 09:45:17AM +0000, Corentin Labbe wrote: > This patch fixes two resources leak that occur on error path. > > Reported-by: coverity-bot > Addresses-Coverity-ID: 1487403 ("RESOURCE_LEAK") > Addresses-Coverity-ID: 1487401 ("Resource leaks") > Fixes: 48fe583fe541 ("crypto: amlogic - Add crypto accelerator for amlogic GXL") > Signed-off-by: Corentin Labbe Thanks! Reviewed-by: Kees Cook -Kees > --- > drivers/crypto/amlogic/amlogic-gxl-cipher.c | 10 ++++++---- > 1 file changed, 6 insertions(+), 4 deletions(-) > > diff --git a/drivers/crypto/amlogic/amlogic-gxl-cipher.c b/drivers/crypto/amlogic/amlogic-gxl-cipher.c > index e9283ffdbd23..58b717aab6e8 100644 > --- a/drivers/crypto/amlogic/amlogic-gxl-cipher.c > +++ b/drivers/crypto/amlogic/amlogic-gxl-cipher.c > @@ -131,7 +131,8 @@ static int meson_cipher(struct skcipher_request *areq) > if (areq->iv && ivsize > 0) { > if (ivsize > areq->cryptlen) { > dev_err(mc->dev, "invalid ivsize=%d vs len=%d\n", ivsize, areq->cryptlen); > - return -EINVAL; > + err = -EINVAL; > + goto theend; > } > memcpy(bkeyiv + 32, areq->iv, ivsize); > keyivlen = 48; > @@ -151,9 +152,10 @@ static int meson_cipher(struct skcipher_request *areq) > > phykeyiv = dma_map_single(mc->dev, bkeyiv, keyivlen, > DMA_TO_DEVICE); > - if (dma_mapping_error(mc->dev, phykeyiv)) { > + err = dma_mapping_error(mc->dev, phykeyiv); > + if (err) { > dev_err(mc->dev, "Cannot DMA MAP KEY IV\n"); > - return -EFAULT; > + goto theend; > } > > tloffset = 0; > @@ -245,7 +247,6 @@ static int meson_cipher(struct skcipher_request *areq) > if (areq->iv && ivsize > 0) { > if (rctx->op_dir == MESON_DECRYPT) { > memcpy(areq->iv, backup_iv, ivsize); > - kzfree(backup_iv); > } else { > scatterwalk_map_and_copy(areq->iv, areq->dst, > areq->cryptlen - ivsize, > @@ -254,6 +255,7 @@ static int meson_cipher(struct skcipher_request *areq) > } > theend: > kzfree(bkeyiv); > + kzfree(backup_iv); > > return err; > } > -- > 2.23.0 > -- Kees Cook