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fix alpha-plane check + add extra checks

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Change-Id: I9d8c9743f9d4f3d394544773ed2d0c31a9acf24d
This commit is contained in:
Pascal Massimino 2012-08-03 14:44:35 -07:00
parent a06f802325
commit c40d7ef125
1 changed files with 7 additions and 2 deletions
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9
src/dec/buffer.c
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@ -51,18 +51,23 @@ static VP8StatusCode CheckDecBuffer(const WebPDecBuffer* const buffer) {
ok &= (y_size <= buf->y_size);
ok &= (u_size <= buf->u_size);
ok &= (v_size <= buf->v_size);
ok &= (a_size <= buf->a_size);
ok &= (buf->y_stride >= width);
ok &= (buf->u_stride >= (width + 1) / 2);
ok &= (buf->v_stride >= (width + 1) / 2);
if (buf->a) {
ok &= (buf->y != NULL);
ok &= (buf->u != NULL);
ok &= (buf->v != NULL);
if (mode == MODE_YUVA) {
ok &= (buf->a_stride >= width);
ok &= (a_size <= buf->a_size);
ok &= (buf->a != NULL);
}
} else { // RGB checks
const WebPRGBABuffer* const buf = &buffer->u.RGBA;
const uint64_t size = (uint64_t)buf->stride * height;
ok &= (size <= buf->size);
ok &= (buf->stride >= width * kModeBpp[mode]);
ok &= (buf->rgba != NULL);
}
return ok ? VP8_STATUS_OK : VP8_STATUS_INVALID_PARAM;
}