From: Krzysztof Kozlowski <k.kozlowski.k@gmail.com> To: Kukjin Kim <kgene@kernel.org>, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Subject: [RESEND PATCH v2 2/3] ARM: EXYNOS: Handle of_find_device_by_node and kstrdup failures Date: Wed, 22 Apr 2015 22:17:09 +0900 [thread overview] Message-ID: <1429708630-19810-2-git-send-email-k.kozlowski.k@gmail.com> (raw) In-Reply-To: <1429708630-19810-1-git-send-email-k.kozlowski.k@gmail.com> From: Krzysztof Kozlowski <k.kozlowski@samsung.com> Prevent possible NULL pointer dereference of pointer returned by of_find_device_by_node(). Handle this by skipping such power domain. Additionally fail the init on kstrdup() failure. Such case is actually not fatal because the name for power domain allocated by kstrdup() is used only in printk. Still as a precaution handle this as an error condition. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> --- Changes since v1: None. --- arch/arm/mach-exynos/pm_domains.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c index 14622b5f4481..61c32ccc9f7a 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -126,6 +126,12 @@ static __init int exynos4_pm_init_power_domain(void) struct device *dev; pdev = of_find_device_by_node(np); + if (!pdev) { + pr_err("%s: failed to find device for node %s\n", + __func__, np->name); + of_node_put(np); + continue; + } dev = &pdev->dev; pd = kzalloc(sizeof(*pd), GFP_KERNEL); @@ -136,6 +142,12 @@ static __init int exynos4_pm_init_power_domain(void) } pd->pd.name = kstrdup(dev_name(dev), GFP_KERNEL); + if (!pd->pd.name) { + kfree(pd); + of_node_put(np); + return -ENOMEM; + } + pd->name = pd->pd.name; pd->base = of_iomap(np, 0); if (!pd->base) { -- 2.1.0
WARNING: multiple messages have this Message-ID (diff)
From: k.kozlowski.k@gmail.com (Krzysztof Kozlowski) To: linux-arm-kernel@lists.infradead.org Subject: [RESEND PATCH v2 2/3] ARM: EXYNOS: Handle of_find_device_by_node and kstrdup failures Date: Wed, 22 Apr 2015 22:17:09 +0900 [thread overview] Message-ID: <1429708630-19810-2-git-send-email-k.kozlowski.k@gmail.com> (raw) In-Reply-To: <1429708630-19810-1-git-send-email-k.kozlowski.k@gmail.com> From: Krzysztof Kozlowski <k.kozlowski@samsung.com> Prevent possible NULL pointer dereference of pointer returned by of_find_device_by_node(). Handle this by skipping such power domain. Additionally fail the init on kstrdup() failure. Such case is actually not fatal because the name for power domain allocated by kstrdup() is used only in printk. Still as a precaution handle this as an error condition. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> --- Changes since v1: None. --- arch/arm/mach-exynos/pm_domains.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c index 14622b5f4481..61c32ccc9f7a 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -126,6 +126,12 @@ static __init int exynos4_pm_init_power_domain(void) struct device *dev; pdev = of_find_device_by_node(np); + if (!pdev) { + pr_err("%s: failed to find device for node %s\n", + __func__, np->name); + of_node_put(np); + continue; + } dev = &pdev->dev; pd = kzalloc(sizeof(*pd), GFP_KERNEL); @@ -136,6 +142,12 @@ static __init int exynos4_pm_init_power_domain(void) } pd->pd.name = kstrdup(dev_name(dev), GFP_KERNEL); + if (!pd->pd.name) { + kfree(pd); + of_node_put(np); + return -ENOMEM; + } + pd->name = pd->pd.name; pd->base = of_iomap(np, 0); if (!pd->base) { -- 2.1.0
next prev parent reply other threads:[~2015-04-22 13:17 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-04-22 13:17 [RESEND PATCH v2 1/3] ARM: EXYNOS: Handle of of_iomap() failure Krzysztof Kozlowski 2015-04-22 13:17 ` Krzysztof Kozlowski 2015-04-22 13:17 ` Krzysztof Kozlowski [this message] 2015-04-22 13:17 ` [RESEND PATCH v2 2/3] ARM: EXYNOS: Handle of_find_device_by_node and kstrdup failures Krzysztof Kozlowski 2015-04-22 13:17 ` [RESEND PATCH v2 3/3] ARM: EXYNOS: Add missing of_node_put() when parsing power domains Krzysztof Kozlowski 2015-04-22 13:17 ` Krzysztof Kozlowski
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