Re: [PATCH] xfs/549: test mkfs.xfs whether terminate getsubopt arrays properly

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On Wed, Jul 20, 2022 at 10:21:19AM -0700, Darrick J. Wong wrote:
> On Wed, Jul 20, 2022 at 01:45:37PM +0800, Yang Xu wrote:
> > When I run xfs/144 manually, the step as below:
> > mkfs.xfs -f -d agcount=3200,size=6366g -d file,n
> > 
> > I accidentally pressed the Enter key, it triggers Segmentation fault.
> > Then I found Darrick has fixed this one weeks ago. So add this test.
> > 
> > Signed-off-by: Yang Xu <xuyang2018.jy@xxxxxxxxxxx>
> > ---
> >  tests/xfs/549     | 33 +++++++++++++++++++++++++++++++++
> >  tests/xfs/549.out |  2 ++
> >  2 files changed, 35 insertions(+)
> >  create mode 100755 tests/xfs/549
> >  create mode 100644 tests/xfs/549.out
> > 
> > diff --git a/tests/xfs/549 b/tests/xfs/549
> > new file mode 100755
> > index 00000000..31ead3c7
> > --- /dev/null
> > +++ b/tests/xfs/549
> > @@ -0,0 +1,33 @@
> > +#! /bin/bash
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Copyright (c) 2022 FUJITSU LIMITED. All rights reserved.
> > +#
> > +# FS QA Test 549
> > +#
> > +# Regression test for xfsprogs commit
> > +# 50dba8189b1f ("mkfs: terminate getsubopt arrays properly")
> > +#
> > +# This case test mkfs.xfs whether can terminate getsubopt arrays properly.
> > +# If not, it will trigger segmentation fault.
> > +#
> > +
> > +. ./common/preamble
> > +_begin_fstest auto quick mkfs
> > +
> > +# real QA test starts here
> > +_supported_fs xfs
> > +_fixed_by_git_commit xfsprogs 50dba8189b1f \
> > +	"mkfs: terminate getsubopt arrays properly"
> > +_require_test
> > +
> > +testfile=$TEST_DIR/a
> > +rm -rf $testfile
> > +
> > +$MKFS_XFS_PROG -f -d agcount=4 -d file,name=$testfile,nrext64=0 \
> > +	>> $seqres.full  2>&1
> 
> Heh, you don't even need $testfile --
> 
> "$MKFS_XFS_PROG -d agcount=3 -d garbagegarbagegarbage=0"
> 
> is enough to cause the crash.  But this works just as well, so

Thanks Darrick.

If it's not needed, let's remove those meaningless lines, likes

  testfile=$TEST_DIR/a
  rm -rf $testfile
  $MKFS_XFS_PROG -f -d agcount=4 -d file,name=$testfile,nrext64=0

That makes me feel this test need "EEXIST" error, to trigger this bug :)

Thanks,
Zorro


> 
> Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> 
> --D
> 
> > +
> > +echo "Silence is golden"
> > +
> > +# success, all done
> > +status=0
> > +exit
> > diff --git a/tests/xfs/549.out b/tests/xfs/549.out
> > new file mode 100644
> > index 00000000..4e3acd3f
> > --- /dev/null
> > +++ b/tests/xfs/549.out
> > @@ -0,0 +1,2 @@
> > +QA output created by 549
> > +Silence is golden
> > -- 
> > 2.23.0
> > 
> 




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