| Message ID | 1472309497-11351-1-git-send-email-zlang@redhat.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Sat, Aug 27, 2016 at 10:51:37PM +0800, Zorro Lang wrote: > Although ro-compat features cannot be mounted rw, a bug allows > an ro->rw remount transition, and this will corrupt the filesystem > if it contains ro-compat features unknown to the running kernel. > > This bug has been fix on linux kernel (d0a58e8 xfs: disallow rw > remount on fs with unknown ro-compat features), this case is > the regression testcase of that bug. > > Signed-off-by: Zorro Lang <zlang@redhat.com> > --- > tests/xfs/263 | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ > tests/xfs/263.out | 6 ++++ > tests/xfs/group | 1 + > 3 files changed, 106 insertions(+) > create mode 100755 tests/xfs/263 > create mode 100644 tests/xfs/263.out > > diff --git a/tests/xfs/263 b/tests/xfs/263 > new file mode 100755 > index 0000000..b934e9f > --- /dev/null > +++ b/tests/xfs/263 > @@ -0,0 +1,99 @@ > +#! /bin/bash > +# FS QA Test 263 > +# > +# Test upstream d0a58e8: > +# xfs: disallow rw remount on fs with unknown ro-compat features > +# > +#----------------------------------------------------------------------- > +# Copyright (c) 2016 Red Hat, 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.* > + # Due to we've broken the superblock of SCRATCH_DEV by > + # xfs_db, so clean bad superblock at the end > + _scratch_unmount > + _scratch_mkfs >/dev/null 2>&1 > +} > + > +# get standard environment, filters and checks > +. ./common/rc > +. ./common/filter > + > +# remove previous $seqres.full before test > +rm -f $seqres.full > + > +# real QA test starts here > +_supported_fs xfs > +_supported_os Linux > +_require_scratch > +_require_xfs_crc > + > +# Only V5 XFS disallow rw mount/remount with unknown ro-compat > +# features > +MKFS_OPTIONS="-m crc=1" > +_scratch_mkfs_xfs >>$seqres.full 2>&1 > + > +# set the highest bit of features_ro_compat, use it as an unknown > +# feature bit. If one day this bit become known feature, please > +# change this case. > +$XFS_DB_PROG -x -c "sb 0" \ > + -c "write features_ro_compat $((2**31))" \ > + $SCRATCH_DEV > + > +echo "rw mount test" > +# Generally this mount failed as bad superblock > +# But still keep testing this > +MOUNT_OPTIONS="-o rw" > +_scratch_mount 2>>$seqres.full > +if [ $? -eq 0 ]; then > + _fail "rw mount test failed" > +fi > + > +echo "ro mount test" > +MOUNT_OPTIONS="-o ro" > +_scratch_mount > +if [ $? -ne 0 ]; then > + _fail "ro mount test failed" > +else > + # no hang/panic is fine > + $FSSTRESS_PROG -d $SCRATCH_MNT -p 4 -n 400 >>$seqres.full 2>&1 > +fi > + > +dmesg -c >/dev/null > +echo "rw remount test" > +MOUNT_OPTIONS="-o rw,remount" > +_scratch_mount 2>>$seqres.full > +if [ $? -eq 0 ]; then > + _fail "rw,remount test failed" > +fi > +dmesg -c | sed -n -e "s/.*XFS.*: \(ro->rw transition prohibited.*\)/\1/p" > + > +# success, all done > +status=0 > +exit > diff --git a/tests/xfs/263.out b/tests/xfs/263.out > new file mode 100644 > index 0000000..974e02f > --- /dev/null > +++ b/tests/xfs/263.out > @@ -0,0 +1,6 @@ > +QA output created by 263 > +features_ro_compat = 0x80000000 > +rw mount test > +ro mount test > +rw remount test > +mount: cannot remount LOOP_IMG read-write, is write-protected Sorry, please ignore this patch. I forgot to update the .out file. I'll send a V2 to fix this problem. Thanks, Zorro > diff --git a/tests/xfs/group b/tests/xfs/group > index 6905a62..ec3c022 100644 > --- a/tests/xfs/group > +++ b/tests/xfs/group > @@ -260,6 +260,7 @@ > 260 auto quick quota > 261 auto quick quota > 262 auto quick quota > +263 auto quick mount > 265 auto clone > 266 dump ioctl auto quick > 267 dump ioctl tape > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe fstests" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/tests/xfs/263 b/tests/xfs/263 new file mode 100755 index 0000000..b934e9f --- /dev/null +++ b/tests/xfs/263 @@ -0,0 +1,99 @@ +#! /bin/bash +# FS QA Test 263 +# +# Test upstream d0a58e8: +# xfs: disallow rw remount on fs with unknown ro-compat features +# +#----------------------------------------------------------------------- +# Copyright (c) 2016 Red Hat, 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.* + # Due to we've broken the superblock of SCRATCH_DEV by + # xfs_db, so clean bad superblock at the end + _scratch_unmount + _scratch_mkfs >/dev/null 2>&1 +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here +_supported_fs xfs +_supported_os Linux +_require_scratch +_require_xfs_crc + +# Only V5 XFS disallow rw mount/remount with unknown ro-compat +# features +MKFS_OPTIONS="-m crc=1" +_scratch_mkfs_xfs >>$seqres.full 2>&1 + +# set the highest bit of features_ro_compat, use it as an unknown +# feature bit. If one day this bit become known feature, please +# change this case. +$XFS_DB_PROG -x -c "sb 0" \ + -c "write features_ro_compat $((2**31))" \ + $SCRATCH_DEV + +echo "rw mount test" +# Generally this mount failed as bad superblock +# But still keep testing this +MOUNT_OPTIONS="-o rw" +_scratch_mount 2>>$seqres.full +if [ $? -eq 0 ]; then + _fail "rw mount test failed" +fi + +echo "ro mount test" +MOUNT_OPTIONS="-o ro" +_scratch_mount +if [ $? -ne 0 ]; then + _fail "ro mount test failed" +else + # no hang/panic is fine + $FSSTRESS_PROG -d $SCRATCH_MNT -p 4 -n 400 >>$seqres.full 2>&1 +fi + +dmesg -c >/dev/null +echo "rw remount test" +MOUNT_OPTIONS="-o rw,remount" +_scratch_mount 2>>$seqres.full +if [ $? -eq 0 ]; then + _fail "rw,remount test failed" +fi +dmesg -c | sed -n -e "s/.*XFS.*: \(ro->rw transition prohibited.*\)/\1/p" + +# success, all done +status=0 +exit diff --git a/tests/xfs/263.out b/tests/xfs/263.out new file mode 100644 index 0000000..974e02f --- /dev/null +++ b/tests/xfs/263.out @@ -0,0 +1,6 @@ +QA output created by 263 +features_ro_compat = 0x80000000 +rw mount test +ro mount test +rw remount test +mount: cannot remount LOOP_IMG read-write, is write-protected diff --git a/tests/xfs/group b/tests/xfs/group index 6905a62..ec3c022 100644 --- a/tests/xfs/group +++ b/tests/xfs/group @@ -260,6 +260,7 @@ 260 auto quick quota 261 auto quick quota 262 auto quick quota +263 auto quick mount 265 auto clone 266 dump ioctl auto quick 267 dump ioctl tape
Although ro-compat features cannot be mounted rw, a bug allows an ro->rw remount transition, and this will corrupt the filesystem if it contains ro-compat features unknown to the running kernel. This bug has been fix on linux kernel (d0a58e8 xfs: disallow rw remount on fs with unknown ro-compat features), this case is the regression testcase of that bug. Signed-off-by: Zorro Lang <zlang@redhat.com> --- tests/xfs/263 | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/xfs/263.out | 6 ++++ tests/xfs/group | 1 + 3 files changed, 106 insertions(+) create mode 100755 tests/xfs/263 create mode 100644 tests/xfs/263.out