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Subject[PATCH 28/64] staging: lustre: uapi: check if argument for lustre_cfg_buf() is NULL
Date
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>
---
drivers/staging/lustre/include/uapi/linux/lustre/lustre_cfg.h | 3 +++
1 file changed, 3 insertions(+)

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 4d23938..4208d61 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;
--
1.8.3.1
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