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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-11-24 03:50:20 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-11-24 04:02:24 +0100 |
| commit | 3d5a5e86be2a65e33c34ab3ad7923f54e8e49c1d (patch) | |
| tree | eb90a7ebaff2bb0962db0d04907746a727471bb2 /libavcodec | |
| parent | 638d79a9d0805e4863f6cd6cce146e3121a26071 (diff) | |
| download | ffmpeg-3d5a5e86be2a65e33c34ab3ad7923f54e8e49c1d.tar.gz | |
avcodec/jpeg2000dec: Check precno before using it in JPEG2000_PGOD_CPRL
Fixes out of array reads
Fixes: asan_heap-oob_f0de57_6823_mjp2.mov
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index b150bc1595..d3e49a19e6 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -889,6 +889,10 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width; prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height; precno = prcx + rlevel->num_precincts_x * prcy; + + if (prcx >= rlevel->num_precincts_x || prcy >= rlevel->num_precincts_y) + return AVERROR_PATCHWELCOME; + for (layno = 0; layno < tile->codsty[0].nlayers; layno++) { if ((ret = jpeg2000_decode_packet(s, codsty, rlevel, precno, layno, |