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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-04-22 21:07:45 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-16 19:06:26 +0200 |
| commit | 69f861be42ecb07e1deac86757760ec36a8e7bef (patch) | |
| tree | 4702ab30f1e718afdb043301ae5ff8940ea0b217 | |
| parent | 3d29170013b1e28770082d660e8695fe26ba4e2f (diff) | |
| download | ffmpeg-69f861be42ecb07e1deac86757760ec36a8e7bef.tar.gz | |
avcodec/h263dec: Check slice_ret in mspeg4 slice loop
Fixes infinite loop
Fixes: 6858/clusterfuzz-testcase-ffmpeg_AV_CODEC_ID_MSMPEG4V3_fuzzer-4681563766784000
Fixes: 6890/clusterfuzz-testcase-ffmpeg_AV_CODEC_ID_WMV1_fuzzer-4756103142309888
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 de841fbea7655b74a9663001e01008a86c88779a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/h263dec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c index 077666470d..8491db0ed6 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -637,7 +637,7 @@ retry: slice_ret = decode_slice(s); while (s->mb_y < s->mb_height) { if (s->msmpeg4_version) { - if (s->slice_height == 0 || s->mb_x != 0 || + if (s->slice_height == 0 || s->mb_x != 0 || slice_ret < 0 || (s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0) break; } else { |