[FFmpeg-cvslog] avcodec/jpeg2000dwt: Fix runtime error: left shift of negative value -123

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Sun Jun 11 20:28:46 2017 +0200| [3a3c32ea1f81e3364bf693926e9c88ddde659f05] | committer: Michael Niedermayer

avcodec/jpeg2000dwt: Fix runtime error: left shift of negative value -123

Fixes: 2208/clusterfuzz-testcase-minimized-5976593765761024

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit d24043e1a2f93f206a2ad59054f24f45ff023e5c)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3a3c32ea1f81e3364bf693926e9c88ddde659f05
---

 libavcodec/jpeg2000dwt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/jpeg2000dwt.c b/libavcodec/jpeg2000dwt.c
index 188cc261a4..735ed0b1dc 100644
--- a/libavcodec/jpeg2000dwt.c
+++ b/libavcodec/jpeg2000dwt.c
@@ -488,7 +488,7 @@ static void dwt_decode97_int(DWTContext *s, int32_t *t)
     line += 5;
 
     for (i = 0; i < w * h; i++)
-        data[i] <<= I_PRESHIFT;
+        data[i] *= 1 << I_PRESHIFT;
 
     for (lev = 0; lev < s->ndeclevels; lev++) {
         int lh = s->linelen[lev][0],