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| author | Luca Barbato <lu_zero@gentoo.org> | 2013-07-01 10:00:58 +0200 |
|---|---|---|
| committer | Luca Barbato <lu_zero@gentoo.org> | 2013-07-02 20:05:43 +0200 |
| commit | 5650e331a733711b809bc27f968500f0f5530126 (patch) | |
| tree | 519c7cba29e59ca7f6ec449a01c07009478b5284 /libavcodec/jpeg2000dec.c | |
| parent | 8ad3267ce3a1522a181946288049cc848cc9e351 (diff) | |
| download | ffmpeg-5650e331a733711b809bc27f968500f0f5530126.tar.gz | |
jpeg2000: Validate resolution levels
There are 32 maximum decomposition levels, thus 33 resolution levels.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Diffstat (limited to 'libavcodec/jpeg2000dec.c')
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 8c49ea9307..e29f73162b 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -251,7 +251,12 @@ static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c) if (s->buf_end - s->buf < 5) return AVERROR(EINVAL); - c->nreslevels = bytestream_get_byte(&s->buf) + 1; // num of resolution levels - 1 + /* nreslevels = number of resolution levels + = number of decomposition level +1 */ + c->nreslevels = bytestream_get_byte(&s->buf) + 1; + + if (c->nreslevels > JPEG2000_MAX_RESLEVELS) + return AVERROR_INVALIDDATA; /* compute number of resolution levels to decode */ if (c->nreslevels < s->reduction_factor) |