[PATCH] D86422: [ELF] .note.gnu.property: error for invalid pr_datasize

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
MaskRay added reviewers: grimar, psmith.
Herald added subscribers: llvm-commits, arichardson, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.
MaskRay requested review of this revision.

A n_type==NT_GNU_PROPERTY_TYPE_0 note encodes a program property.
If pr_datasize is invalid, LLD may crash
(https://github.com/ClangBuiltLinux/linux/issues/1141)

This patch adds the error checking, supports big-endian, and some tests
for invalid n_descsz.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86422

Files:
  lld/ELF/InputFiles.cpp
  lld/test/ELF/gnu-property-err.s

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