[all-commits] [llvm/llvm-project] 25863c: [ELF] .note.gnu.property: error for invalid pr_dat...

[Fangrui Song via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 25863cc512a38ae9b1235ee62faa79ff2aa3c226
      https://github.com/llvm/llvm-project/commit/25863cc512a38ae9b1235ee62faa79ff2aa3c226
  Author: Fangrui Song <i at maskray.me>
  Date:   2020-08-25 (Tue, 25 Aug 2020)

  Changed paths:
    M lld/ELF/InputFiles.cpp
    A lld/test/ELF/gnu-property-err.s

  Log Message:
  -----------
  [ELF] .note.gnu.property: error for invalid pr_datasize

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 some error checking, supports big-endian, and add some tests
for invalid n_descsz.

Differential Revision: https://reviews.llvm.org/D86422