This is not necessarily specific to fuzzed files
Fixes: Multiple integer overflows
Fixes: 656/clusterfuzz-testcase-
6463814516080640
Fixes: 658/clusterfuzz-testcase-
6691260146384896
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
s->sprite_delta[0][i] *= 1 << shift_y;
s->sprite_delta[1][i] *= 1 << shift_y;
ctx->sprite_shift[i] = 16;
+
+ if (llabs(s->sprite_offset[i][0] + s->sprite_delta[i][0] * (int64_t)w) >= INT_MAX ||
+ llabs(s->sprite_offset[i][0] + s->sprite_delta[i][1] * (int64_t)h) >= INT_MAX ||
+ llabs(s->sprite_offset[i][0] + s->sprite_delta[i][0] * (int64_t)w + s->sprite_delta[i][1] * (int64_t)h) >= INT_MAX) {
+ avpriv_request_sample(s->avctx, "Overflow on sprite points");
+ return AVERROR_PATCHWELCOME;
+ }
}
s->real_sprite_warping_points = ctx->num_sprite_warping_points;
}