ffmpeg | branch: release/2.8 | Michael Niedermayer <mich...@niedermayer.cc> | Sat Feb 17 23:54:44 2018 +0100| [299b981382725c1befb56c8f324ce067783220d6] | committer: Michael Niedermayer
avcodec/diracdec: Use int64 in global mv to prevent overflow Fixes: runtime error: signed integer overflow: 361 * -6295541 cannot be represented in type 'int' Fixes: 5911/clusterfuzz-testcase-minimized-6450382197751808 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 cbcbefdc3b4cbc917d2f8b2dd216fb12121a838b) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=299b981382725c1befb56c8f324ce067783220d6 --- libavcodec/diracdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index 7c7a31e830..fb54312c49 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -1186,8 +1186,8 @@ static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref) int *c = s->globalmc[ref].perspective; int m = (1<<ep) - (c[0]*x + c[1]*y); - int mx = m * ((A[0][0] * x + A[0][1]*y) + (1<<ez) * b[0]); - int my = m * ((A[1][0] * x + A[1][1]*y) + (1<<ez) * b[1]); + int64_t mx = m * (int64_t)((A[0][0] * x + A[0][1]*y) + (1<<ez) * b[0]); + int64_t my = m * (int64_t)((A[1][0] * x + A[1][1]*y) + (1<<ez) * b[1]); block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep); block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
