RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-29 10:52:20 +00:00
Code Issues Projects Releases Wiki Activity

avcodec/iff: Check input space before loop in decode_delta_d()

Browse Source 
Fixes: Timeout (114sec ->108ms)
Fixes: 19290/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5740598116220928

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 2019-12-12 23:13:02 +01:00
parent 934cc1faf4
commit e7af64178a
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
libavcodec/iff.c
View File

@ -1354,6 +1354,9 @@ static void decode_delta_d(uint8_t *dst,
bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
entries = bytestream2_get_be32(&gb);
if (entries * 8LL > bytestream2_get_bytes_left(&gb))
return;
while (entries && bytestream2_get_bytes_left(&gb) >= 8) {
int32_t opcode = bytestream2_get_be32(&gb);
unsigned offset = bytestream2_get_be32(&gb);