On Thu, Sep 21, 2017 at 07:34:46PM -0700, Richard Wareing wrote:
> Verify kernel doesn't panic when user attempts to set realtime flags
> on non-realtime FS, using kernel compiled with CONFIG_XFS_RT. Unpatched
> kernels will panic during this test. Kernels not compiled with
> CONFIG_XFS_RT should pass test.
>
> This bug was fixed via commit b31ff3cdf540110da4572e3e29bd172087af65cc
> on the main kernel tree.
>
> Signed-off-by: Richard Wareing <rwareing@xxxxxx>
> ---
> Changes since v4:
> * Check inherit flag on scratch mount via lsattr + grep
>
> Changes since v3:
> * Tabs not spaces
> * Test added to auto group
> * _filter_xfs_io filter only
> * Removed _require_test
>
> Changes since v2:
> * Added to dangerous group
>
> Changes since v1:
> * Corrected copyright text
>
> tests/xfs/431 | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> tests/xfs/431.out | 3 ++
> tests/xfs/group | 1 +
> 3 files changed, 88 insertions(+)
> create mode 100755 tests/xfs/431
> create mode 100644 tests/xfs/431.out
>
> diff --git a/tests/xfs/431 b/tests/xfs/431
> new file mode 100755
> index 0000000..414ec46
> --- /dev/null
> +++ b/tests/xfs/431
> @@ -0,0 +1,84 @@
> +#! /bin/bash
> +# FS QA Test 431
> +#
> +# Verify kernel doesn't panic when user attempts to set realtime flags
> +# on non-realtime FS, using kernel compiled with CONFIG_XFS_RT. Unpatched
> +# kernels will panic during this test. Kernels not compiled with
> +# CONFIG_XFS_RT should pass test.
> +#
> +# See CVE-2017-14340 for more information.
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2017 Facebook, Inc. All Rights Reserved.
> +#
> +# This program is free software; you can redistribute it and/or
> +# modify it under the terms of the GNU General Public License as
> +# published by the Free Software Foundation.
> +#
> +# This program is distributed in the hope that it would be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program; if not, write the Free Software Foundation,
> +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
> +#-----------------------------------------------------------------------
> +#
> +
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1 # failure is the default!
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +_cleanup()
> +{
> + cd /
> + rm -f $tmp.*
> +}
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +
> +# Modify as appropriate.
> +_supported_fs xfs
> +_supported_os Linux
> +_require_xfs_io_command "chattr"
> +_require_xfs_io_command "fsync"
> +_require_xfs_io_command "pwrite"
> +_require_scratch
> +
> +_scratch_mkfs >/dev/null 2>&1
> +_scratch_mount
> +
> +# Set realtime inherit flag on scratch mount, suppress output
> +# as this may simply error out on future kernels, we will check
> +# exit code instead.
> +$XFS_IO_PROG -c 'chattr +t' $SCRATCH_MNT &> /dev/null
> +
> +# Erroring out here is fine, this would be desired behavior for
> +# FSes without realtime devices present.
> +if $XFS_IO_PROG -c 'lsattr' $SCRATCH_MNT |
> + grep '^[[:graph:]]\{7\}t[[:graph:]]\{8\}' &> /dev/null; then
This looks better to me. Though I don't think assuming the fixed
position of 't' is a good idea. We may add new attr flags so the
position could change. Why not just grep for 't'? We don't have multiple
't's anyway :)
if $XFS_IO_PROG -c 'lsattr' $SCRATCH_MNT | grep -q 't'; then
...
I can do this update at commit time if this looks fine to you.
Thanks,
Eryu
> + # Attempt to write/fsync data to file
> + $XFS_IO_PROG -fc 'pwrite 0 1m' -c fsync $SCRATCH_MNT/testfile |
> + tee -a $seqres.full | _filter_xfs_io
> +
> + # Remove the rt inherit flag after we are done or xfs_repair
> + # will fail.
> + $XFS_IO_PROG -c 'chattr -t' $SCRATCH_MNT | tee -a $seqres.full 2>&1
> +fi
> +
> +# success, all done
> +status=0
> +exit
> diff --git a/tests/xfs/431.out b/tests/xfs/431.out
> new file mode 100644
> index 0000000..8c14f11
> --- /dev/null
> +++ b/tests/xfs/431.out
> @@ -0,0 +1,3 @@
> +QA output created by 431
> +wrote 1048576/1048576 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> diff --git a/tests/xfs/group b/tests/xfs/group
> index 0a449b9..1765559 100644
> --- a/tests/xfs/group
> +++ b/tests/xfs/group
> @@ -427,3 +427,4 @@
> 428 dangerous_fuzzers dangerous_scrub dangerous_online_repair
> 429 dangerous_fuzzers dangerous_scrub dangerous_repair
> 430 dangerous_fuzzers dangerous_scrub dangerous_online_repair
> +431 auto quick dangerous
> --
> 2.9.5
>
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