This checks the sprite delta intermediates for overflow
Fixes: 716/clusterfuzz-testcase-
4890287480504320
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
for (i = 0; i < 2; i++) {
if (llabs(s->sprite_offset[0][i] + s->sprite_delta[i][0] * (w+16LL)) >= INT_MAX ||
llabs(s->sprite_offset[0][i] + s->sprite_delta[i][1] * (h+16LL)) >= INT_MAX ||
- llabs(s->sprite_offset[0][i] + s->sprite_delta[i][0] * (w+16LL) + s->sprite_delta[i][1] * (h+16LL)) >= INT_MAX) {
+ llabs(s->sprite_offset[0][i] + s->sprite_delta[i][0] * (w+16LL) + s->sprite_delta[i][1] * (h+16LL)) >= INT_MAX ||
+ llabs(s->sprite_delta[i][0] * (w+16LL)) >= INT_MAX ||
+ llabs(s->sprite_delta[i][1] * (w+16LL)) >= INT_MAX
+ ) {
avpriv_request_sample(s->avctx, "Overflow on sprite points");
goto overflow;
}