[all-commits] [llvm/llvm-project] 2584e1: [llvm-readobj] - Don't crash when relocation table...

[Georgii Rymar via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 2584e1e324c97eeeacc1e421e5f3191a708c3d2d
      https://github.com/llvm/llvm-project/commit/2584e1e324c97eeeacc1e421e5f3191a708c3d2d
  Author: Georgii Rymar <grimar at accesssoftek.com>
  Date:   2020-11-23 (Mon, 23 Nov 2020)

  Changed paths:
    M llvm/test/tools/llvm-readobj/ELF/broken-dynamic-reloc.test
    M llvm/tools/llvm-readobj/ELFDumper.cpp

  Log Message:
  -----------
  [llvm-readobj] - Don't crash when relocation table goes past the EOF.

It is possible to trigger reading past the EOF by breaking fields like
DT_PLTRELSZ, DT_RELSZ or DT_RELASZ

This patch adds a validation in `DynRegionInfo` helper class.

Differential revision: https://reviews.llvm.org/D91787