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@niedermayer.cc>
8 years ago · d24043e1a2
parent c996374d4d
commit d24043e1a2
1 changed files with 1 additions and 1 deletions
--- 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],