From b532ca3d2f1f1caab71c0aab979949882b695198 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Thu, 25 Nov 2021 15:58:14 +0100
Subject: [PATCH] lavd/v4l2: reduce variable scope

device and cap are local to the loop iteration, there is no need for
them to retain their values. Especially for device it may be dangerous,
since it points to av_malloc'ed data.
---
 libavdevice/v4l2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 4b7984f1b0..fefea54142 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -1019,8 +1019,6 @@ static int v4l2_get_device_list(AVFormatContext *ctx, AVDeviceInfoList *device_l
     struct video_data *s = ctx->priv_data;
     DIR *dir;
     struct dirent *entry;
-    AVDeviceInfo *device = NULL;
-    struct v4l2_capability cap;
     int ret = 0;
 
     if (!device_list)
@@ -1033,6 +1031,8 @@ static int v4l2_get_device_list(AVFormatContext *ctx, AVDeviceInfoList *device_l
         return ret;
     }
     while ((entry = readdir(dir))) {
+        AVDeviceInfo *device = NULL;
+        struct v4l2_capability cap;
         int fd = -1;
         char device_name[256];