decoder/DsdLib: check size before seeking

This commit is contained in:
Max Kellermann 2015-01-30 23:19:26 +01:00
parent fd02c87fa2
commit 3ecb19d0f1

View File

@ -112,19 +112,18 @@ dsdlib_tag_id3(InputStream &is,
if (tagoffset == 0 || !is.KnownSize())
return;
if (!dsdlib_skip_to(nullptr, is, tagoffset))
return;
/* Prevent broken files causing problems */
const auto size = is.GetSize();
if (tagoffset >= size)
return;
const id3_length_t count = size - tagoffset;
if (count < 10 || count > 1024 * 1024)
return;
if (!dsdlib_skip_to(nullptr, is, tagoffset))
return;
id3_byte_t *const id3_buf = new id3_byte_t[count];
if (id3_buf == nullptr)
return;