From f514113cfa9fc44d80086bb2a2b783e8026dc3a9 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 23 Nov 2020 21:42:23 +0100 Subject: [PATCH] avformat/flvdec: Treat high ts byte as unsigned Fixes: left shift of 255 by 24 places cannot be represented in type 'int' Fixes: 27516/clusterfuzz-testcase-minimized-ffmpeg_dem_KUX_fuzzer-5152854660349952 Signed-off-by: Michael Niedermayer --- libavformat/flvdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c index 943c0278e5..30d1fcf4b7 100644 --- a/libavformat/flvdec.c +++ b/libavformat/flvdec.c @@ -1174,7 +1174,7 @@ retry_duration: avio_seek(s->pb, fsize - 3 - size, SEEK_SET); if (size == avio_rb24(s->pb) + 11) { uint32_t ts = avio_rb24(s->pb); - ts |= avio_r8(s->pb) << 24; + ts |= (unsigned)avio_r8(s->pb) << 24; if (ts) s->duration = ts * (int64_t)AV_TIME_BASE / 1000; else if (fsize >= 8 && fsize - 8 >= size) {