From: "Gustavo A. R. Silva" <gustavo@embeddedor.com> To: Russell King <linux@armlinux.org.uk>, Linus Walleij <linus.walleij@linaro.org> Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" <gustavo@embeddedor.com> Subject: [PATCH v2 1/2] ARM: integrator: impd1: fix NULL pointer dereference Date: Fri, 4 Jan 2019 23:54:21 -0600 [thread overview] Message-ID: <418252fcd77472413ce15ac3df167e448a4defe9.1546667177.git.gustavo@embeddedor.com> (raw) In-Reply-To: <cover.1546667177.git.gustavo@embeddedor.com> There is a potential NULL pointer dereference in case devm_kzalloc() fails and returns NULL. Fix this by adding a NULL check on lookup. This issue was detected with the help of Coccinelle. Fixes: 684284b64aae ("ARM: integrator: add MMCI device to IM-PD1") Cc: stable@vger.kernel.org Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- Changes in v2: - None. arch/arm/mach-integrator/impd1.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c index a109f6482413..eb0149561be2 100644 --- a/arch/arm/mach-integrator/impd1.c +++ b/arch/arm/mach-integrator/impd1.c @@ -392,6 +392,9 @@ static int __ref impd1_probe(struct lm_device *dev) lookup = devm_kzalloc(&dev->dev, sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup), GFP_KERNEL); + if (!lookup) + return -ENOMEM; + chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL); mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id); lookup->dev_id = mmciname; -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com> To: Russell King <linux@armlinux.org.uk>, Linus Walleij <linus.walleij@linaro.org> Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Gustavo A. R. Silva" <gustavo@embeddedor.com> Subject: [PATCH v2 1/2] ARM: integrator: impd1: fix NULL pointer dereference Date: Fri, 4 Jan 2019 23:54:21 -0600 [thread overview] Message-ID: <418252fcd77472413ce15ac3df167e448a4defe9.1546667177.git.gustavo@embeddedor.com> (raw) In-Reply-To: <cover.1546667177.git.gustavo@embeddedor.com> There is a potential NULL pointer dereference in case devm_kzalloc() fails and returns NULL. Fix this by adding a NULL check on lookup. This issue was detected with the help of Coccinelle. Fixes: 684284b64aae ("ARM: integrator: add MMCI device to IM-PD1") Cc: stable@vger.kernel.org Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- Changes in v2: - None. arch/arm/mach-integrator/impd1.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c index a109f6482413..eb0149561be2 100644 --- a/arch/arm/mach-integrator/impd1.c +++ b/arch/arm/mach-integrator/impd1.c @@ -392,6 +392,9 @@ static int __ref impd1_probe(struct lm_device *dev) lookup = devm_kzalloc(&dev->dev, sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup), GFP_KERNEL); + if (!lookup) + return -ENOMEM; + chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL); mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id); lookup->dev_id = mmciname; -- 2.20.1 _______________________________________________ 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:[~2019-01-05 5:54 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-01-05 5:52 [PATCH v2 0/2] Fix NULL pointer dereference and use struct_size Gustavo A. R. Silva 2019-01-05 5:52 ` Gustavo A. R. Silva 2019-01-05 5:54 ` Gustavo A. R. Silva [this message] 2019-01-05 5:54 ` [PATCH v2 1/2] ARM: integrator: impd1: fix NULL pointer dereference Gustavo A. R. Silva 2019-01-05 5:55 ` [PATCH v2 2/2] ARM: integrator: impd1: use struct_size() in devm_kzalloc() Gustavo A. R. Silva 2019-01-05 5:55 ` Gustavo A. R. Silva 2019-01-11 12:33 ` Linus Walleij 2019-01-11 12:33 ` Linus Walleij
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