openharmony/third_party_ffmpeg
1
0
Fork 0
mirror of https://gitee.com/openharmony/third_party_ffmpeg synced 2024-11-23 11:19:55 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

avcodec/xvididct: Fix integer overflow in MULT()

Browse Source 
Fixes: signed integer overflow: 23170 * 95058 cannot be represented in type 'int'
Fixes: 20295/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MJPEG_fuzzer-5800212870463488

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-01-31 23:43:57 +01:00
parent 187161d62f
commit 7ccb576191
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/xvididct.c
View File

@ -142,7 +142,7 @@ static int idct_row(short *in, const int *const tab, int rnd)
#define TAN3 0xAB0E
#define SQRT2 0x5A82
#define MULT(c, x, n) (((c) * (x)) >> (n))
#define MULT(c, x, n) ((unsigned)((int)((c) * (unsigned)(x)) >> (n)))
// 12b version => #define MULT(c,x, n) ((((c) >> 3) * (x)) >> ((n) - 3))
// 12b zero-testing version: