[FFmpeg-cvslog] avcodec/jpeg2000dec: Check PPx / PPy values
Michael Niedermayer
git at videolan.org
Thu Jun 25 00:26:32 CEST 2015
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Wed Jun 24 22:58:58 2015 +0200| [2d8bf3d126a3894cc77697e2d0359087c7036b4b] | committer: Michael Niedermayer
avcodec/jpeg2000dec: Check PPx / PPy values
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2d8bf3d126a3894cc77697e2d0359087c7036b4b
---
libavcodec/jpeg2000dec.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index fc5dc28..1901127 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -461,6 +461,13 @@ static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
byte = bytestream2_get_byte(&s->g);
c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
+ if (i)
+ if (c->log2_prec_widths[i] == 0 || c->log2_prec_heights[i] == 0) {
+ av_log(s->avctx, AV_LOG_ERROR, "PPx %d PPy %d invalid\n",
+ c->log2_prec_widths[i], c->log2_prec_heights[i]);
+ c->log2_prec_widths[i] = c->log2_prec_heights[i] = 1;
+ return AVERROR_INVALIDDATA;
+ }
}
} else {
memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
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