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Message-Id: <20221227023625.7261-1-chuanjian@nfschina.com>
Date: Tue, 27 Dec 2022 10:36:25 +0800
From: Dong Chuanjian <chuanjian@...china.com>
To: mchehab@...nel.org, hverkuil-cisco@...all.nl,
nicolas.dufresne@...labora.com, sebastian.fricke@...labora.com,
ezequiel@...guardiasur.com.ar
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
Dong Chuanjian <chuanjian@...china.com>
Subject: [PATCH] drivers/media/v4l2-core/v4l2-h264 : add detection of null pointers
When the pointer variable is judged to be null, null is returned
directly.
Signed-off-by: Dong Chuanjian <chuanjian@...china.com>
---
v2: Directly return when pointer allocation fails.
v3: problems in synchronous repair format_ref_list_p
diff --git a/drivers/media/v4l2-core/v4l2-h264.c b/drivers/media/v4l2-core/v4l2-h264.c
index 72bd64f65198..f6684c1d7319 100644
--- a/drivers/media/v4l2-core/v4l2-h264.c
+++ b/drivers/media/v4l2-core/v4l2-h264.c
@@ -305,6 +305,8 @@ static const char *format_ref_list_p(const struct v4l2_h264_reflist_builder *bui
int n = 0, i;
*out_str = kmalloc(tmp_str_size, GFP_KERNEL);
+ if (*out_str == NULL)
+ return NULL;
n += snprintf(*out_str + n, tmp_str_size - n, "|");
@@ -343,6 +345,8 @@ static const char *format_ref_list_b(const struct v4l2_h264_reflist_builder *bui
int n = 0, i;
*out_str = kmalloc(tmp_str_size, GFP_KERNEL);
+ if (*out_str == NULL)
+ return NULL;
n += snprintf(*out_str + n, tmp_str_size - n, "|");
--
2.18.2
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