From b92260f70a4ac194d1cc09c40b92766d38c7c783 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 12 Nov 2022 18:14:19 +0100 Subject: [PATCH] avformat/lafdec: Check for EOF in header reading Fixes: OOM testcase Fixes: 51527/clusterfuzz-testcase-minimized-ffmpeg_dem_LAF_fuzzer-5453663505612800 OOM can still happen after this as an arbitrary sized block is allocated and read this would require a redesign or some limit on the sample rate. Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/lafdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/lafdec.c b/libavformat/lafdec.c index 12b0d8540b..d02b479c4d 100644 --- a/libavformat/lafdec.c +++ b/libavformat/lafdec.c @@ -111,6 +111,9 @@ static int laf_read_header(AVFormatContext *ctx) sample_rate = avio_rl32(pb); duration = avio_rl64(pb) / st_count; + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; + switch (quality) { case 0: codec_id = AV_CODEC_ID_PCM_U8;