From e5ab2dab2c73710c753bf8a44171fc747625e9f3 Mon Sep 17 00:00:00 2001 From: Andreas Rheinhardt Date: Thu, 6 Jul 2023 22:48:55 +0200 Subject: [PATCH] avformat/evcdec: Check that enough data has been read Fixes potential use of uninitialized values in evc_read_nal_unit_length(). Reviewed-by: James Almer Signed-off-by: Andreas Rheinhardt --- libavformat/evcdec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/evcdec.c b/libavformat/evcdec.c index 9e09f8d264..6cce174f46 100644 --- a/libavformat/evcdec.c +++ b/libavformat/evcdec.c @@ -162,6 +162,8 @@ static int evc_read_packet(AVFormatContext *s, AVPacket *pkt) ret = avio_read(s->pb, buf, EVC_NALU_LENGTH_PREFIX_SIZE); if (ret < 0) return ret; + if (ret != EVC_NALU_LENGTH_PREFIX_SIZE) + return AVERROR_INVALIDDATA; nalu_size = evc_read_nal_unit_length(buf, EVC_NALU_LENGTH_PREFIX_SIZE); if (!nalu_size || nalu_size > INT_MAX)