ffmpeg | branch: release/2.8 | Michael Niedermayer <mich...@niedermayer.cc> | Mon Mar 21 20:51:47 2022 +0100| [51ce9b5029b77c874e5737acd26c368a53f9f330] | committer: Michael Niedermayer
avcodec/diracdec: avoid signed integer overflow in global mv Fixes: signed integer overflow: -128275513086 * -76056576 cannot be represented in type 'long' Fixes: 45818/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-5129799149944832 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 7f1279684e8e1e33c78577b7f0265c062e4e6232) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=51ce9b5029b77c874e5737acd26c368a53f9f330 --- libavcodec/diracdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index 87cb093ed5..2c530d96a8 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; int64_t m = (1<<ep) - (c[0]*(int64_t)x + c[1]*(int64_t)y); - int64_t mx = m * (int64_t)((A[0][0] * (int64_t)x + A[0][1]*(int64_t)y) + (1LL<<ez) * b[0]); - int64_t my = m * (int64_t)((A[1][0] * (int64_t)x + A[1][1]*(int64_t)y) + (1LL<<ez) * b[1]); + int64_t mx = m * (uint64_t)((A[0][0] * (int64_t)x + A[0][1]*(int64_t)y) + (1LL<<ez) * b[0]); + int64_t my = m * (uint64_t)((A[1][0] * (int64_t)x + A[1][1]*(int64_t)y) + (1LL<<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 https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
