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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-04-22 22:07:45 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-18 02:16:04 +0300 |
| commit | 3b23dd4b91afa378344cc3f4cdc7dea2b88a9fe7 (patch) | |
| tree | 7165a82799ea71829a829dfa2bd57944ef8efe0a /libavcodec/h263dec.c | |
| parent | 24947b3f7dd26a73696f428b3311731995bc45ef (diff) | |
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>
Diffstat (limited to 'libavcodec/h263dec.c')
| -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 bcb2b08bb0..9497c735b2 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 { |