ffmpeg | branch: release/4.1 | Michael Niedermayer <mich...@niedermayer.cc> | Thu Jun 27 00:15:03 2019 +0200| [4db3ec5e7b1ab08abbe08dbcb7c9de37e8b3dfe4] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> (cherry picked from commit 2bbea155bf7c6ce6d5ae53cc41e44798cad2f39c) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4db3ec5e7b1ab08abbe08dbcb7c9de37e8b3dfe4 --- libavcodec/4xm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c index 8e05a4c366..7e6a15e49f 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]) { _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".