src: Check the filesize before calling mmap()

This commit is contained in:
Frank LENORMAND 2019-11-26 13:26:31 +01:00
parent fc9e0e8c6a
commit 7a384edeb0

View File

@ -217,13 +217,12 @@ MappedFile::MappedFile(StringView filename)
if (st.st_size == 0)
return;
else if (st.st_size > std::numeric_limits<int>::max())
throw runtime_error("file is too big");
data = (const char*)mmap(nullptr, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (data == MAP_FAILED)
throw file_access_error{filename, strerror(errno)};
if (st.st_size > std::numeric_limits<int>::max())
throw runtime_error("file is too big");
}
MappedFile::~MappedFile()