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| author | Michael Niedermayer <michael@niedermayer.cc> | 2016-01-27 17:13:10 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-01-31 00:24:52 +0100 |
| commit | 69e191f854f75815f17099a9a5f911dc30075c70 (patch) | |
| tree | 67f2243f93246fc4124d09f19ab0a6cfffe7da54 | |
| parent | 3fa6ecca763225adada3b275806eafcbf0472dda (diff) | |
| download | ffmpeg-69e191f854f75815f17099a9a5f911dc30075c70.tar.gz | |
avcodec/jpeg2000dec: More completely check cdef
Fixes out of array access
Fixes: j2k-poc.bin
Found-by: Lucas Leong <wmliang.tw@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 0aada30510d809bccfd539a90ea37b61188f2cb4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 39e99cc295..2430c73e2e 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -1245,11 +1245,15 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, if (tile->codsty[0].mct) mct_decode(s, tile); - if (s->cdef[0] < 0) { - for (x = 0; x < s->ncomponents; x++) - s->cdef[x] = x + 1; - if ((s->ncomponents & 1) == 0) - s->cdef[s->ncomponents-1] = 0; + for (x = 0; x < s->ncomponents; x++) { + if (s->cdef[x] < 0) { + for (x = 0; x < s->ncomponents; x++) { + s->cdef[x] = x + 1; + } + if ((s->ncomponents & 1) == 0) + s->cdef[s->ncomponents-1] = 0; + break; + } } if (s->precision <= 8) { |