ffmpeg | branch: release/3.4 | Michael Niedermayer <mich...@niedermayer.cc> | Tue Jun 20 00:13:43 2023 +0200| [ebea366ea992dcb26c23546ac7f9048b9fb5d81f] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> (cherry picked from commit 90647a9249aee8c0ef6c0bced3558ada9643f5b6) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ebea366ea992dcb26c23546ac7f9048b9fb5d81f --- libavcodec/huffyuvdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/huffyuvdec.c b/libavcodec/huffyuvdec.c index 4b8bc5b858..62b83705b4 100644 --- a/libavcodec/huffyuvdec.c +++ b/libavcodec/huffyuvdec.c @@ -751,7 +751,7 @@ static void decode_plane_bitstream(HYuvContext *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); } } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
