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58cff8a009
Many tests use `program ... && fail=1` to ensure expected error situations are indicated. However that would mask an unexpected exit (like a crash). Therefore explicitly check the expected exit code. Note where error messages are also verified, the extra protection is not added. * tests/init.sh (returns_): A new helper function to check the return code of a command, and used throughout the tests. * cfg.mk (sc_prohibit_and_fail_1): Add a syntax check to avoid new instances of this issue.
65 lines
2.1 KiB
Bash
Executable File
65 lines
2.1 KiB
Bash
Executable File
#!/bin/sh
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# Ensure that cut does not allocate mem for large ranges
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# Copyright (C) 2012-2015 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ cut
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require_ulimit_v_
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getlimits_
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# sed script to subtract one from the input.
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# Each input line should consist of a positive decimal number.
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# Each output line's number is one less than the input's.
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# There's no limit (other than line length) on the number's magnitude.
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subtract_one='
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s/$/@/
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: again
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s/0@/@9/
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s/1@/0/
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s/2@/1/
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s/3@/2/
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s/4@/3/
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s/5@/4/
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s/6@/5/
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s/7@/6/
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s/8@/7/
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s/9@/8/
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t again
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'
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# Ensure we can cut up to our sentinel value.
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# This is currently SIZE_MAX, but could be raised to UINTMAX_MAX
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# if we didn't allocate memory for each line as a unit.
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# Don't use expr to subtract one, since SIZE_MAX may exceed its maximum value.
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CUT_MAX=$(echo $SIZE_MAX | sed "$subtract_one")
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# From coreutils-8.10 through 8.20, this would make cut try to allocate
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# a 256MiB bit vector. With a 20MB limit on VM, the following would fail.
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(ulimit -v 20000; : | cut -b$CUT_MAX- > err 2>&1) || fail=1
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# Up to and including coreutils-8.21, cut would allocate possibly needed
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# memory upfront. Subsequently extra memory is no longer needed.
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(ulimit -v 20000; : | cut -b1-$CUT_MAX >> err 2>&1) || fail=1
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# Explicitly disallow values above CUT_MAX
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(ulimit -v 20000; : | returns_ 1 cut -b$SIZE_MAX 2>/dev/null) || fail=1
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(ulimit -v 20000; : | returns_ 1 cut -b$SIZE_OFLOW 2>/dev/null) || fail=1
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compare /dev/null err || fail=1
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Exit $fail
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