tests/memcpy-abuse

   1 #!/bin/sh
   2 # Before gzip-1.4, this the use of memcpy in inflate_codes could
   3 # mistakenly operate on overlapping regions.  Exercise that code.
   4
   5 # Copyright (C) 2010-2021 Free Software Foundation, Inc.
   6
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19 # limit so don't run it by default.
  20
  21 . "${srcdir=.}/init.sh"; path_prepend_ ..
  22
  23 # The input must be larger than 32KiB and slightly
  24 # less uniform than e.g., all zeros.
  25 printf wxy%032767d 0 | tee in | gzip > in.gz || framework_failure_
  26
  27 fail=0
  28
  29 # Before the fix, this would call memcpy with overlapping regions.
  30 gzip -dc in.gz > out || fail=1
  31
  32 compare in out || fail=1
  33
  34 Exit $fail