From: James Simmons <jsimmons@infradead.org>
Date: Sun, 20 Aug 2017 02:26:22 +0000 (-0400)
Subject: staging: lustre: uapi: check if argument for lustre_cfg_buf() is NULL
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ef27faebbad8d936bd2672ed94c4b925b5c92609;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

staging: lustre: uapi: check if argument for lustre_cfg_buf() is NULL

Check if lcfg passed in is NULL and if it is just return NULL.

Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6245
Reviewed-on: https://review.whamcloud.com/22138
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/lustre/include/uapi/linux/lustre/lustre_cfg.h b/drivers/staging/lustre/include/uapi/linux/lustre/lustre_cfg.h
index 4d2393870ccd..4208d61cb37b 100644
--- a/drivers/staging/lustre/include/uapi/linux/lustre/lustre_cfg.h
+++ b/drivers/staging/lustre/include/uapi/linux/lustre/lustre_cfg.h
@@ -161,6 +161,9 @@ static inline void *lustre_cfg_buf(struct lustre_cfg *lcfg, __u32 index)
 	size_t offset;
 	__u32 bufcount;
 
+	if (!lcfg)
+		return NULL;
+
 	bufcount = lcfg->lcfg_bufcount;
 	if (index >= bufcount)
 		return NULL;