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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-07-27 23:49:27 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-07-29 14:23:24 +0200 |
| commit | 934878f2a62f6744e44b1ef8085ffdfa6d4a5007 (patch) | |
| tree | ebd9410061db2e6a724710f3976368321b600041 | |
| parent | 38d9a782a585f82e8ee543d8e806a6a282322e5c (diff) | |
| download | ffmpeg-934878f2a62f6744e44b1ef8085ffdfa6d4a5007.tar.gz | |
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 <michael@niedermayer.cc>
(cherry picked from commit c0220c768c7fc933a76c863ebbb0abdf68a88533)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -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 42ccbb5746..6ab3c5f7f4 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -249,7 +249,7 @@ 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) |