PR #22924 opened by Zhao Zhili (quink)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22924
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22924.patch

Signed-off-by: Zhao Zhili <[email protected]>


>From 3bfc5b8820ad3ed56bc8c235635d35460563e3ba Mon Sep 17 00:00:00 2001
From: Zhao Zhili <[email protected]>
Date: Mon, 13 Apr 2026 21:16:07 +0800
Subject: [PATCH] avdevice/v4l2: fix mmap_free() skipping first buffer

Signed-off-by: Zhao Zhili <[email protected]>
---
 libavdevice/v4l2.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 28bcc3df2a..2ca093b7b0 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -362,9 +362,8 @@ static void list_standards(AVFormatContext *ctx)
 
 static void mmap_free(struct video_data *s, int n)
 {
-    while (--n > 0) {
-        v4l2_munmap(s->buf_data[n].start, s->buf_data[n].len);
-    }
+    for (int i = 0; i < n; i++)
+        v4l2_munmap(s->buf_data[i].start, s->buf_data[i].len);
     av_freep(&s->buf_data);
 }
 
-- 
2.52.0

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