[PATCH] D97757: [lld-macho] Rework length check when opening input files

[Greg McGary via Phabricator via llvm-commits]

gkm added inline comments.


================
Comment at: lld/MachO/InputFiles.cpp:109
   auto *hdr = reinterpret_cast<const MachO::fat_header *>(buf);
-  if (read32be(&hdr->magic) != MachO::FAT_MAGIC) {
+  if (mbref.getBufferSize() < sizeof(uint32_t) ||
+      read32be(&hdr->magic) != MachO::FAT_MAGIC) {
----------------
This is the new guard for adequate buffer size before reading the magic#


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D97757/new/

https://reviews.llvm.org/D97757