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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-27 00:15:03 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-02 19:41:48 +0100 |
| commit | a70dd95c43c09c30bc8650066fa809026b33576a (patch) | |
| tree | ffa80a29072b308c54af0efcf3114bba80c0b923 /libavcodec | |
| parent | 76a60fc760bb189a94d2e941d6bc5dd5b34a6d2a (diff) | |
| download | ffmpeg-a70dd95c43c09c30bc8650066fa809026b33576a.tar.gz | |
avcodec/4xm: Fix signed integer overflows in idct()
Fixes: signed integer overflow: 20242 * 121095 cannot be represented in type 'int'
Fixes: 15310/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FOURXM_fuzzer-5737051745419264
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 2bbea155bf7c6ce6d5ae53cc41e44798cad2f39c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/4xm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c index 90446a2677..6c135c36ab 100644 --- a/libavcodec/4xm.c +++ b/libavcodec/4xm.c @@ -158,7 +158,7 @@ typedef struct FourXContext { #define FIX_1_847759065 121095 #define FIX_2_613125930 171254 -#define MULTIPLY(var, const) (((var) * (const)) >> 16) +#define MULTIPLY(var, const) ((int)((var) * (unsigned)(const)) >> 16) static void idct(int16_t block[64]) { |