[FFmpeg-devel] [PATCH] libavformat/udp: Fix call to recvfrom(2) (PR #20797)

[desmondliu via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

PR #20797 opened by desmondliu
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20797
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20797.patch

Last parameter to recvfrom() is not initialized, causing
recvfrom() to randomly return EINVAL. Issue was introduced in
af04a27893.


>From 4348bde2d2c58a2409c277f487541be00a5f61f6 Mon Sep 17 00:00:00 2001
From: Desmond Liu <desmond.liu@netint.ca>
Date: Thu, 30 Oct 2025 17:22:12 -0700
Subject: [PATCH] libavformat/udp: Fix call to recvfrom(2)

Last parameter to recvfrom() is not initialized, causing
recvfrom() to randomly return EINVAL. Issue was introduced in
af04a27893.
---
 libavformat/udp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavformat/udp.c b/libavformat/udp.c
index 87a9d5d431..61e80c86c5 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -543,6 +543,7 @@ static void *circular_buffer_task_rx( void *_URLContext)
     }
     while(1) {
         UDPQueuedPacketHeader pkt_header;
+        pkt_header.addr_len = sizeof(pkt_header.addr);
 
         pthread_mutex_unlock(&s->mutex);
         /* Blocking operations are always cancellation points;
-- 
2.49.1

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