[all-commits] [llvm/llvm-project] 7a20d6: [ELF] Correctly compute .gdb_index size when symbo...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7a20d6abe4e42ce5d19d50d7f90963440750507b
      https://github.com/llvm/llvm-project/commit/7a20d6abe4e42ce5d19d50d7f90963440750507b
  Author: Fangrui Song <i at maskray.me>
  Date:   2022-08-31 (Wed, 31 Aug 2022)

  Changed paths:
    M lld/ELF/SyntheticSections.cpp
    M lld/ELF/SyntheticSections.h

  Log Message:
  -----------
  [ELF] Correctly compute .gdb_index size when symbol's name offset overflows

if `nameOff` overflows, `size` may be underestimated.
In writeTo, `memcpy(buf + sym.nameOff, sym.name.data(), sym.name.size());` may
cause an out-of-bounds write, leading to a SIGSEGV.