avcodec/jpeg2000: Fix runtime error: signed integer overflow: 4185 + 2147483394 cannot be represented in type 'int'

Fixes: 1870/clusterfuzz-testcase-minimized-4686788029317120 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 · 781f88bb26
parent 9c1812491f
commit 781f88bb26
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/jpeg2000.h
+++ b/libavcodec/jpeg2000.h
@ -220,7 +220,7 @@ static inline int ff_jpeg2000_ceildivpow2(int a, int b)

 static inline int ff_jpeg2000_ceildiv(int a, int b)
 {
-    return (a + b - 1) / b;
+    return (a + (int64_t)b - 1) / b;
 }

 /* TIER-1 routines */