virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-08-15 14:13:16 +02:00
Code Issues Releases Activity

avcodec/pngdec: Check length in fdAT

Browse Source 
Fixes: 21089/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APNG_fuzzer-5135981419429888
Fixes: out of array read

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2020-04-07 19:29:44 +02:00
parent 4f54982773
commit 79e5c2ee2b
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/pngdec.c
View File

@@ -1252,7 +1252,7 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s,
case MKTAG('f', 'd', 'A', 'T'): case MKTAG('f', 'd', 'A', 'T'):
if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG) if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG)
goto skip_tag; goto skip_tag;
if (!decode_next_dat) { if (!decode_next_dat || length < 4) {
ret = AVERROR_INVALIDDATA; ret = AVERROR_INVALIDDATA;
goto fail; goto fail;
} }