[FFmpeg-devel] [PATCH 2/2] avformat/demux: Count EAGAIN as 100 bytes in relation to read limit in avformat_find_stream_info()

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/2] avformat/demux: Count EAGAIN as 100 bytes in relation to read limit in avformat_find_stream_info()
Date: Tue,  8 Feb 2022 21:23:53 +0100
Message-ID: <20220208202353.19554-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20220208202353.19554-1-michael@niedermayer.cc>

Fixes: Timeout
Fixes: 43717/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5206008287330304

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/demux.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavformat/demux.c b/libavformat/demux.c
index dd42d32710..1acba0c608 100644
--- a/libavformat/demux.c
+++ b/libavformat/demux.c
@@ -2590,8 +2590,10 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
         /* NOTE: A new stream can be added there if no header in file
          * (AVFMTCTX_NOHEADER). */
         ret = read_frame_internal(ic, pkt1);
-        if (ret == AVERROR(EAGAIN))
+        if (ret == AVERROR(EAGAIN)) {
+            read_size += 100;
             continue;
+        }
 
         if (ret < 0) {
             /* EOF or error*/
-- 
2.17.1

_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel

To unsubscribe, visit link above, or email
ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
