From: Bartosz Golaszewski <brgl@bgdev.pl> To: Jonathan Cameron <jic23@kernel.org>, Lars-Peter Clausen <lars@metafoo.de>, Peter Meerwald-Stadler <pmeerw@pmeerw.net>, Michal Simek <michal.simek@xilinx.com> Cc: linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski <bgolaszewski@baylibre.com> Subject: [PATCH v2 1/4] device: provide devm_krealloc_array() Date: Mon, 2 Nov 2020 15:22:25 +0100 [thread overview] Message-ID: <20201102142228.14949-2-brgl@bgdev.pl> (raw) In-Reply-To: <20201102142228.14949-1-brgl@bgdev.pl> From: Bartosz Golaszewski <bgolaszewski@baylibre.com> When allocating an array of elements, users should check for multiplication overflow or preferably use one of the provided helpers like: devm_kmalloc_array(). This provides devm_krealloc_array() for users who want to reallocate managed arrays. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> --- include/linux/device.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index 5ed101be7b2e..e77203faea55 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -226,6 +226,17 @@ static inline void *devm_kmalloc_array(struct device *dev, return devm_kmalloc(dev, bytes, flags); } +static inline void * +devm_krealloc_array(struct device *dev, void *ptr, size_t new_n, + size_t new_size, gfp_t gfp) +{ + size_t bytes; + + if (unlikely(check_mul_overflow(new_n, new_size, &bytes))) + return NULL; + + return devm_krealloc(dev, ptr, bytes, gfp); +} static inline void *devm_kcalloc(struct device *dev, size_t n, size_t size, gfp_t flags) { -- 2.29.1
WARNING: multiple messages have this Message-ID (diff)
From: Bartosz Golaszewski <brgl@bgdev.pl> To: Jonathan Cameron <jic23@kernel.org>, Lars-Peter Clausen <lars@metafoo.de>, Peter Meerwald-Stadler <pmeerw@pmeerw.net>, Michal Simek <michal.simek@xilinx.com> Cc: linux-iio@vger.kernel.org, Bartosz Golaszewski <bgolaszewski@baylibre.com>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 1/4] device: provide devm_krealloc_array() Date: Mon, 2 Nov 2020 15:22:25 +0100 [thread overview] Message-ID: <20201102142228.14949-2-brgl@bgdev.pl> (raw) In-Reply-To: <20201102142228.14949-1-brgl@bgdev.pl> From: Bartosz Golaszewski <bgolaszewski@baylibre.com> When allocating an array of elements, users should check for multiplication overflow or preferably use one of the provided helpers like: devm_kmalloc_array(). This provides devm_krealloc_array() for users who want to reallocate managed arrays. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> --- include/linux/device.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index 5ed101be7b2e..e77203faea55 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -226,6 +226,17 @@ static inline void *devm_kmalloc_array(struct device *dev, return devm_kmalloc(dev, bytes, flags); } +static inline void * +devm_krealloc_array(struct device *dev, void *ptr, size_t new_n, + size_t new_size, gfp_t gfp) +{ + size_t bytes; + + if (unlikely(check_mul_overflow(new_n, new_size, &bytes))) + return NULL; + + return devm_krealloc(dev, ptr, bytes, gfp); +} static inline void *devm_kcalloc(struct device *dev, size_t n, size_t size, gfp_t flags) { -- 2.29.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-11-02 14:26 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-02 14:22 [PATCH v2 0/4] iio: adc: xilinx: use even more devres Bartosz Golaszewski 2020-11-02 14:22 ` Bartosz Golaszewski 2020-11-02 14:22 ` Bartosz Golaszewski [this message] 2020-11-02 14:22 ` [PATCH v2 1/4] device: provide devm_krealloc_array() Bartosz Golaszewski 2020-11-14 15:46 ` Jonathan Cameron 2020-11-14 15:46 ` Jonathan Cameron 2020-11-14 16:17 ` Greg KH 2020-11-14 16:17 ` Greg KH 2020-11-16 10:18 ` Bartosz Golaszewski 2020-11-16 10:18 ` Bartosz Golaszewski 2020-11-23 11:38 ` Bartosz Golaszewski 2020-11-23 11:38 ` Bartosz Golaszewski 2020-11-28 16:00 ` Jonathan Cameron 2020-11-28 16:00 ` Jonathan Cameron 2020-11-02 14:22 ` [PATCH v2 2/4] iio: adc: xilinx: use helper variable for &pdev->dev Bartosz Golaszewski 2020-11-02 14:22 ` Bartosz Golaszewski 2020-11-02 14:22 ` [PATCH v2 3/4] iio: adc: xilinx: use devm_krealloc_array() instead of kfree() + kcalloc() Bartosz Golaszewski 2020-11-02 14:22 ` Bartosz Golaszewski 2020-11-02 14:22 ` [PATCH v2 4/4] iio: adc: xilinx: use more devres helpers and remove remove() Bartosz Golaszewski 2020-11-02 14:22 ` Bartosz Golaszewski 2020-11-08 17:08 ` Jonathan Cameron 2020-11-08 17:08 ` Jonathan Cameron 2020-11-09 10:52 ` Bartosz Golaszewski 2020-11-09 10:52 ` Bartosz Golaszewski 2020-11-08 17:08 ` [PATCH v2 0/4] iio: adc: xilinx: use even more devres Jonathan Cameron 2020-11-08 17:08 ` Jonathan Cameron
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