On Tue, May 01, 2018 at 08:39:26AM -0700, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > Kanda Motohiro reported that expanding a tiny xattr into a large xattr > fails on XFS because we remove the tiny xattr from a shortform fork and > then try to re-add it after converting the fork to extents format having > not removed the ATTR_REPLACE flag. This fails because the attr is no > longer present, causing a fs shutdown. > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199119 > Reported-by: kanda.motohiro@xxxxxxxxx > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Thanks for the revision! Because I found more issues in v1 than I expected, so I drop the patch from last fstests update. I should have made that clear.. > --- > .gitignore | 1 + > src/Makefile | 3 +- > src/attr_replace_test.c | 60 +++++++++++++++++++++++++++++++++++++++++ > tests/generic/706 | 68 +++++++++++++++++++++++++++++++++++++++++++++++ > tests/generic/706.out | 2 + > tests/generic/group | 1 + > 6 files changed, 134 insertions(+), 1 deletion(-) > create mode 100644 src/attr_replace_test.c > create mode 100755 tests/generic/706 > create mode 100644 tests/generic/706.out > > > diff --git a/.gitignore b/.gitignore > index 192ca35e..af9743f9 100644 > --- a/.gitignore > +++ b/.gitignore > @@ -53,6 +53,7 @@ > /src/append_reader > /src/append_writer > /src/attr-list-by-handle-cursor-test > +/src/attr_replace_test Seems this should be put before attr-list-by-handle-cursor-test, according to the result of sort. > /src/bstat > /src/bulkstat_unlink_test > /src/bulkstat_unlink_test_modified > diff --git a/src/Makefile b/src/Makefile > index 6ca56366..c42d3bb1 100644 > --- a/src/Makefile > +++ b/src/Makefile > @@ -25,7 +25,8 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ > seek_copy_test t_readdir_1 t_readdir_2 fsync-tester nsexec cloner \ > renameat2 t_getcwd e4compact test-nextquota punch-alternating \ > attr-list-by-handle-cursor-test listxattr dio-interleaved t_dir_type \ > - dio-invalidate-cache stat_test t_encrypted_d_revalidate > + dio-invalidate-cache stat_test t_encrypted_d_revalidate \ > + attr_replace_test > > SUBDIRS = log-writes perf > > diff --git a/src/attr_replace_test.c b/src/attr_replace_test.c > new file mode 100644 > index 00000000..c870d165 > --- /dev/null > +++ b/src/attr_replace_test.c > @@ -0,0 +1,60 @@ > +// setattr.c by kanda.motohiro@xxxxxxxxx > +// xfs extended attribute corruption bug reproducer > +#include <stdio.h> > +#include <string.h> > +#include <fcntl.h> > +#include <errno.h> > +#include <stdlib.h> > +#include <unistd.h> > +#include <sys/types.h> > +#include <sys/xattr.h> > +#include <sys/stat.h> > + > +#define die() do { perror(""); \ > +fprintf(stderr, "error=%d at line %d\n", errno, __LINE__); \ > +exit(1); } while (0) > + > +int main(int argc, char *argv[]) > +{ > + int ret; > + int fd; > + char *path; > + char *name = "user.world"; > + char *value; > + struct stat sbuf; > + size_t size = sizeof(value); > + > + if (argc != 2) die(); die() doesn't seem like the right thing to do (and some other places), it'll print something like: Success error=0 at line NN I'd define a new "fail()" macro and use it where appropriate. +#define fail(...) do { \ +fprintf(stderr, __VA_ARGS__); exit (1); \ +} while (0) I can fix the minor issues on commit, for real this time :) Thanks, Eryu > + path = argv[1]; > + > + fd = open(path, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR); > + if (fd < 0) die(); > + > + /* > + * The value should be 3/4 the size of a fs block to ensure that we > + * get to extents format. > + */ > + ret = fstat(fd, &sbuf); > + if (ret < 0) die(); > + size = sbuf.st_blksize * 3 / 4; > + if (!size) die(); > + value = malloc(size); > + if (!value) die(); > + > + // First, create a small xattr. > + memset(value, '0', 1); > + ret = fsetxattr(fd, name, value, 1, XATTR_CREATE); > + if (ret < 0) die(); > + close(fd); > + > + fd = open(path, O_RDWR); > + if (fd < 0) die(); > + > + // Then, replace it with bigger one, forcing short form to leaf conversion. > + memset(value, '1', size); > + ret = fsetxattr(fd, name, value, size, XATTR_REPLACE); > + if (ret < 0) die(); > + close(fd); > + > + return 0; > +} > diff --git a/tests/generic/706 b/tests/generic/706 > new file mode 100755 > index 00000000..9f98c3b1 > --- /dev/null > +++ b/tests/generic/706 > @@ -0,0 +1,68 @@ > +#! /bin/bash > +# FS QA Test No. 706 > +# > +# Ensure that we can XATTR_REPLACE a tiny attr into a large attr. > +# Kanda Motohiro <kanda.motohiro@xxxxxxxxx> reports that XATTR_REPLACE'ing > +# a single-byte attr with a 2048-byte attr causes a fs shutdown because we > +# remove the shortform attr, convert the attr fork to long format, and then > +# try to re-add the attr having not cleared ATTR_REPLACE. > +# > +#----------------------------------------------------------------------- > +# Copyright (c) 2018 Oracle. 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" > + > +status=1 # failure is the default! > +trap "_cleanup; exit \$status" 0 1 2 3 15 > + > +_cleanup() > +{ > + cd / > + rm -f $testfile > +} > + > +# get standard environment, filters and checks > +. ./common/rc > +. ./common/filter > +. ./common/attr > + > +# remove previous $seqres.full before test > +rm -f $seqres.full > + > +# real QA test starts here > +_supported_fs generic > +_supported_os Linux > +_require_test_program "attr_replace_test" > +_require_attrs > +_require_scratch > + > +rm -f $seqres.full > +_scratch_mkfs >>$seqres.full 2>&1 > +_scratch_mount >>$seqres.full 2>&1 > + > +filter_attr_output() { > + _filter_scratch | sed -e 's/has a [0-9]* byte value/has a NNNN byte value/g' > +} > + > +./src/attr_replace_test $SCRATCH_MNT/hello > +$ATTR_PROG -l $SCRATCH_MNT/hello | filter_attr_output > + > +status=0 > +exit > diff --git a/tests/generic/706.out b/tests/generic/706.out > new file mode 100644 > index 00000000..61c8419a > --- /dev/null > +++ b/tests/generic/706.out > @@ -0,0 +1,2 @@ > +QA output created by 706 > +Attribute "world" has a NNNN byte value for SCRATCH_MNT/hello > diff --git a/tests/generic/group b/tests/generic/group > index 19be9267..54a85ea0 100644 > --- a/tests/generic/group > +++ b/tests/generic/group > @@ -487,3 +487,4 @@ > 482 auto metadata replay > 483 auto quick log metadata > 484 auto quick > +706 auto quick attr > -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
