From: Markus Elfring <Markus.Elfring@web.de> To: linux-mmc@vger.kernel.org, kernel-janitors@vger.kernel.org, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Dmitry Torokhov <dmitry.torokhov@gmail.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Paolo Abeni <pabeni@redhat.com>, Ulf Hansson <ulf.hansson@linaro.org>, Yang Yingliang <yangyingliang@huawei.com> Cc: LKML <linux-kernel@vger.kernel.org>, cocci@inria.fr Subject: [PATCH] mmc: mmc_spi: Adjust error handling in mmc_spi_probe() Date: Wed, 27 Dec 2023 12:50:50 +0100 [thread overview] Message-ID: <2aa6bd31-f3d8-41ac-abf1-9ec7cf7e064b@web.de> (raw) From: Markus Elfring <elfring@users.sourceforge.net> Date: Wed, 27 Dec 2023 12:23:20 +0100 The kfree() function was called in one case by the mmc_spi_probe() function during error handling even if the passed variable contained a null pointer. This issue was detected by using the Coccinelle software. * Thus return directly after a call of the function “kmalloc” failed at the beginning. * Move an error code assignment into an if branch. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> --- drivers/mmc/host/mmc_spi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c index b0cccef4cfbf..6e7d8e1e6f38 100644 --- a/drivers/mmc/host/mmc_spi.c +++ b/drivers/mmc/host/mmc_spi.c @@ -1349,15 +1349,17 @@ static int mmc_spi_probe(struct spi_device *spi) * NOTE if many systems use more than one MMC-over-SPI connector * it'd save some memory to share this. That's evidently rare. */ - status = -ENOMEM; ones = kmalloc(MMC_SPI_BLOCKSIZE, GFP_KERNEL); if (!ones) - goto nomem; + return -ENOMEM; + memset(ones, 0xff, MMC_SPI_BLOCKSIZE); mmc = mmc_alloc_host(sizeof(*host), &spi->dev); - if (!mmc) + if (!mmc) { + status = -ENOMEM; goto nomem; + } mmc->ops = &mmc_spi_ops; mmc->max_blk_size = MMC_SPI_BLOCKSIZE; -- 2.43.0
WARNING: multiple messages have this Message-ID (diff)
From: Markus Elfring <Markus.Elfring@web.de> To: linux-mmc@vger.kernel.org, kernel-janitors@vger.kernel.org, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Dmitry Torokhov <dmitry.torokhov@gmail.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Paolo Abeni <pabeni@redhat.com>, Ulf Hansson <ulf.hansson@linaro.org>, Yang Yingliang <yangyingliang@huawei.com> Cc: LKML <linux-kernel@vger.kernel.org>, cocci@inria.fr Subject: [cocci] [PATCH] mmc: mmc_spi: Adjust error handling in mmc_spi_probe() Date: Wed, 27 Dec 2023 12:50:50 +0100 [thread overview] Message-ID: <2aa6bd31-f3d8-41ac-abf1-9ec7cf7e064b@web.de> (raw) From: Markus Elfring <elfring@users.sourceforge.net> Date: Wed, 27 Dec 2023 12:23:20 +0100 The kfree() function was called in one case by the mmc_spi_probe() function during error handling even if the passed variable contained a null pointer. This issue was detected by using the Coccinelle software. * Thus return directly after a call of the function “kmalloc” failed at the beginning. * Move an error code assignment into an if branch. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> --- drivers/mmc/host/mmc_spi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c index b0cccef4cfbf..6e7d8e1e6f38 100644 --- a/drivers/mmc/host/mmc_spi.c +++ b/drivers/mmc/host/mmc_spi.c @@ -1349,15 +1349,17 @@ static int mmc_spi_probe(struct spi_device *spi) * NOTE if many systems use more than one MMC-over-SPI connector * it'd save some memory to share this. That's evidently rare. */ - status = -ENOMEM; ones = kmalloc(MMC_SPI_BLOCKSIZE, GFP_KERNEL); if (!ones) - goto nomem; + return -ENOMEM; + memset(ones, 0xff, MMC_SPI_BLOCKSIZE); mmc = mmc_alloc_host(sizeof(*host), &spi->dev); - if (!mmc) + if (!mmc) { + status = -ENOMEM; goto nomem; + } mmc->ops = &mmc_spi_ops; mmc->max_blk_size = MMC_SPI_BLOCKSIZE; -- 2.43.0
next reply other threads:[~2023-12-27 11:51 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-12-27 11:50 Markus Elfring [this message] 2023-12-27 11:50 ` [cocci] [PATCH] mmc: mmc_spi: Adjust error handling in mmc_spi_probe() Markus Elfring 2023-12-27 16:56 ` Andy Shevchenko 2023-12-27 17:28 ` [cocci] " Markus Elfring 2023-12-27 17:28 ` Markus Elfring
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