linux-kernel - [PATCH] staging: media: davinci_vpfe: add error handling on kmalloc failure

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Date:   Fri, 16 Mar 2018 13:58:23 +0900
From:   Ji-Hun Kim <ji_hun.kim@...sung.com>
To:     mchehab@...nel.org
Cc:     gregkh@...uxfoundation.org, arvind.yadav.cs@...il.com,
        ji_hun.kim@...sung.com, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] staging: media: davinci_vpfe: add error handling on kmalloc
 failure

There is no failure checking on the param value which will be allocated
memory by kmalloc. Add a null pointer checking statement. Then goto error:
and return -ENOMEM error code when kmalloc is failed.

Signed-off-by: Ji-Hun Kim <ji_hun.kim@...sung.com>
---
 drivers/staging/media/davinci_vpfe/dm365_ipipe.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/staging/media/davinci_vpfe/dm365_ipipe.c b/drivers/staging/media/davinci_vpfe/dm365_ipipe.c
index 6a3434c..55a922c 100644
--- a/drivers/staging/media/davinci_vpfe/dm365_ipipe.c
+++ b/drivers/staging/media/davinci_vpfe/dm365_ipipe.c
@@ -1280,6 +1280,10 @@ static int ipipe_s_config(struct v4l2_subdev *sd, struct vpfe_ipipe_config *cfg)
 
 			params = kmalloc(sizeof(struct ipipe_module_params),
 					 GFP_KERNEL);
+			if (!params) {
+				rval = -ENOMEM;
+				goto error;
+			}
 			to = (void *)params + module_if->param_offset;
 			size = module_if->param_size;
 
@@ -1323,6 +1327,10 @@ static int ipipe_g_config(struct v4l2_subdev *sd, struct vpfe_ipipe_config *cfg)
 
 			params =  kmalloc(sizeof(struct ipipe_module_params),
 						GFP_KERNEL);
+			if (!params) {
+				rval = -ENOMEM;
+				goto error;
+			}
 			from = (void *)params + module_if->param_offset;
 			size = module_if->param_size;
 
-- 
1.9.1