xenia-project/FFmpeg
1
0
Fork 0
mirror of https://github.com/xenia-project/FFmpeg.git synced 2025-02-08 21:28:38 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

avcodec/tiff: Check palette shift

Browse Source 
Fixes multiple  runtime error: shift exponent 792 is too large for 32-bit type 'unsigned int'

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-03-14 01:34:14 +01:00
parent 58e9c7f4a2
commit cfa10e11be
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
libavcodec/tiff.c
View File

@ -996,6 +996,11 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame)
bytestream2_skip(&pal_gb[2], count / 3 * off * 2);
off = (type_sizes[type] - 1) << 3;
if (off > 31U) {
av_log(s->avctx, AV_LOG_ERROR, "palette shift %d is out of range\n", off);
return AVERROR_INVALIDDATA;
}
for (i = 0; i < count / 3; i++) {
uint32_t p = 0xFF000000;
p |= (ff_tget(&pal_gb[0], type, s->le) >> off) << 16;