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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-04-05 22:58:29 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 13:33:44 +0200 |
| commit | 91e39dd6f30ff466086701aeeff2b0405a97d76f (patch) | |
| tree | 495cbd5f6c89abdabdc46e011d54213c42c511c4 | |
| parent | 0678c4d350dbf6f915368e5bb0c7de41b22b7fba (diff) | |
| download | ffmpeg-91e39dd6f30ff466086701aeeff2b0405a97d76f.tar.gz | |
avcodec/g2meet: Check tile_width in epic_jb_decode_tile()
Fixes: out of array access
Fixes: 21469/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_G2M_fuzzer-5199357982015488
Alternatively the arrays can be made bigger or the index can be clipped.
In case a real file with such huge tiles exist we ask the user to upload it.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 5501bb28ddfa6441dcbf8ea0a964a13aa33f66fe)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/g2meet.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/g2meet.c b/libavcodec/g2meet.c index 731d29a5d4..7ef275c9fe 100644 --- a/libavcodec/g2meet.c +++ b/libavcodec/g2meet.c @@ -917,6 +917,11 @@ static int epic_jb_decode_tile(G2MContext *c, int tile_x, int tile_y, awidth = FFALIGN(tile_width, 16); aheight = FFALIGN(tile_height, 16); + if (tile_width > (1 << FF_ARRAY_ELEMS(c->ec.prev_row_rung))) { + avpriv_request_sample(avctx, "large tile width"); + return AVERROR_INVALIDDATA; + } + if (els_dsize) { int ret, i, j, k; uint8_t tr_r, tr_g, tr_b, *buf; |