diff options
| author | Michael Niedermayer <[email protected]> | 2017-07-27 23:49:27 +0200 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2017-07-29 14:23:24 +0200 |
| commit | 7827b06d7731caf06a95f91b5339c8888532218d (patch) | |
| tree | 45d822833c13ea68fd13115334c393dbb199f56c | |
| parent | bae812711ad24d8371cddf24337534017a6a33a7 (diff) | |
avcodec/diracdec: Fix integer overflow in divide3()
Fixes: runtime error: signed integer overflow: -1073746548 * 21845 cannot be represented in type 'int'
Fixes: 2729/clusterfuzz-testcase-minimized-5902915464069120
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit c0220c768c7fc933a76c863ebbb0abdf68a88533)
Signed-off-by: Michael Niedermayer <[email protected]>
| -rw-r--r-- | libavcodec/diracdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index c50a861a95..bc0eb90ab1 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -248,7 +248,7 @@ enum dirac_subband { /* magic number division by 3 from schroedinger */ static inline int divide3(int x) { - return ((x+1)*21845 + 10922) >> 16; + return (int)((x+1U)*21845 + 10922) >> 16; } static DiracFrame *remove_frame(DiracFrame *framelist[], int picnum) |