[FFmpeg-cvslog] avcodec/jpeg2000: Check that codsty->log2_prec_widths/heights has been initialized

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Mon Sep  4 22:23:26 2017 +0200| [64e034da954125ef98fb8f9153f9706cdb8a96fe] | committer: Michael Niedermayer

avcodec/jpeg2000: Check that codsty->log2_prec_widths/heights has been initialized

Fixes: OOM
Fixes: 2225/clusterfuzz-testcase-minimized-5505632079708160

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=64e034da954125ef98fb8f9153f9706cdb8a96fe
---

 libavcodec/jpeg2000.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/jpeg2000.c b/libavcodec/jpeg2000.c
index 94efc94c4d..afeb9df27c 100644
--- a/libavcodec/jpeg2000.c
+++ b/libavcodec/jpeg2000.c
@@ -506,6 +506,9 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
         // update precincts size: 2^n value
         reslevel->log2_prec_width  = codsty->log2_prec_widths[reslevelno];
         reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
+        if (!reslevel->log2_prec_width || !reslevel->log2_prec_height) {
+            return AVERROR_INVALIDDATA;
+        }
 
         /* Number of bands for each resolution level */
         if (reslevelno == 0)