ffmpeg | branch: release/3.0 | Michael Niedermayer <mich...@niedermayer.cc> | Sun Feb 18 21:51:38 2018 +0100| [6822bd50c1eaa385b202ba692d954e1fb2a97fc3] | committer: Michael Niedermayer
avcodec/diracdec: Fix integer overflow in mv computation Fixes: signed integer overflow: -2072 + -2147483646 cannot be represented in type 'int' Fixes: 6097/clusterfuzz-testcase-minimized-5034145253163008 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 47e65ad63b3d067445c4de41a7718b83fc07767c) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6822bd50c1eaa385b202ba692d954e1fb2a97fc3 --- libavcodec/diracdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index 033fbe4261..da5240a135 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -1353,8 +1353,8 @@ static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock global_mv(s, block, x, y, i); } else { pred_mv(block, stride, x, y, i); - block->u.mv[i][0] += dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA); - block->u.mv[i][1] += dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA); + block->u.mv[i][0] += (unsigned)dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA); + block->u.mv[i][1] += (unsigned)dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA); } } } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
