From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Tue, 23 May 2017 18:41:40 +0000 (+0200)
Subject: pinctrl: samsung: Handle memory allocation failure during wakeup banks init
X-Git-Tag: Ubuntu-5.10.0-12.13~9975^2~17^2~1
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=a1ea9a400f5c76cdbe31a8f5c3154f464d84b803;p=mirror_ubuntu-hirsute-kernel.git

pinctrl: samsung: Handle memory allocation failure during wakeup banks init

Check if kmemdup failed during wakeup banks initialization.  Otherwise
NULL pointer would be stored under "irq_chip" member of bank and later
dereferenced in interrupt handler.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 727462cc670c..96068b40d32a 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -479,6 +479,8 @@ int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
 		if (match) {
 			irq_chip = kmemdup(match->data,
 				sizeof(*irq_chip), GFP_KERNEL);
+			if (!irq_chip)
+				return -ENOMEM;
 			wkup_np = np;
 			break;
 		}