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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-01-11 23:56:05 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-03-16 14:48:37 +0100 |
| commit | ce0bb67b1fda5e95ee438471c8ffc06b977b8ef2 (patch) | |
| tree | 73f83adbd86b32f4f60f3bd836d52ced30a68be8 | |
| parent | 365203e99ec46695578776ab1afc16fbc207a6aa (diff) | |
| download | ffmpeg-ce0bb67b1fda5e95ee438471c8ffc06b977b8ef2.tar.gz | |
avcodec/pngdec: dont skip/read chunk twice
Fixes: out of array access
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PNG_fuzzer-6668158952144896.fuzz
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit df1a38d5200e14a29903f1027b4548d595c7ff8a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/pngdec.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index 23e42aaf26..9f142980a0 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -1231,6 +1231,7 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s, } av_log(avctx, AV_LOG_ERROR, ", skipping\n"); bytestream2_skip(&s->gb, length + 8); /* tag */ + continue; } } tag = bytestream2_get_le32(&s->gb); |