| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2017 Facebook, Inc. All Rights Reserved. |
| # |
| # 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. |
| # |
| . ./common/preamble |
| _begin_fstest auto quick |
| |
| # Import common functions. |
| . ./common/filter |
| |
| # real QA test starts here |
| |
| # Modify as appropriate. |
| _supported_fs xfs |
| _require_xfs_io_command "chattr" "t" |
| _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 |
| _xfs_force_bdev realtime $SCRATCH_MNT &> /dev/null |
| |
| # Check if 't' is actually set, as xfs_io returns 0 even when it fails to set |
| # an attribute. And 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 -q 't'; then |
| # 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 testfile and rt inherit flag after we are done or |
| # xfs_repair will fail. |
| rm -f $SCRATCH_MNT/testfile |
| _xfs_force_bdev data $SCRATCH_MNT | tee -a $seqres.full 2>&1 |
| fi |
| |
| # success, all done |
| status=0 |
| exit |