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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-06-20 00:13:43 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-09-14 22:00:17 +0200 |
| commit | 90647a9249aee8c0ef6c0bced3558ada9643f5b6 (patch) | |
| tree | f94ddc67883e8064779d612db5e24a98a08ad545 | |
| parent | ca09d8a0dcd82e3128e62463231296aaf63ae6f7 (diff) | |
avcodec/huffyuvdec: avoid undefined behavior with get_vlc2() failure
Fixes: left shift of negative value -1
Fixes: 59889/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HUFFYUV_fuzzer-5472742275940352
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/huffyuvdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/huffyuvdec.c b/libavcodec/huffyuvdec.c index 0b7f91dd0a..ce6d4d4c59 100644 --- a/libavcodec/huffyuvdec.c +++ b/libavcodec/huffyuvdec.c @@ -757,7 +757,7 @@ static void decode_plane_bitstream(HYuvDecContext *s, int width, int plane) } } if( width&1 && get_bits_left(&s->gb)>0 ) { - int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2; + int dst = (unsigned)get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2; s->temp16[0][width-1] = dst + get_bits(&s->gb, 2); } } |