From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH 6/5] xfs: only check da node header padding on v5 filesystems
Date: Wed, 8 Nov 2017 12:56:36 -0800 [thread overview]
Message-ID: <20171108205636.GG26910@magnolia> (raw)
In-Reply-To: <151001660179.26786.15701876786383794673.stgit@magnolia>
From: Darrick J. Wong <darrick.wong@oracle.com>
It turns out that we only started zeroing a new da btree node's block
header on v5 filesystems. Prior to that, we just wouldn't set anything
at all, which means that the pad field never got set and would retain
whatever happened to be in memory.
Therefore, we can only check the pad for zeroness on v5 filesystems.
shared/006 on a v4 filesystem exposes this scrub bug.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/scrub/dabtree.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/scrub/dabtree.c b/fs/xfs/scrub/dabtree.c
index 4c9839c..d94edd9 100644
--- a/fs/xfs/scrub/dabtree.c
+++ b/fs/xfs/scrub/dabtree.c
@@ -378,7 +378,8 @@ xfs_scrub_da_btree_block(
blk->magic = be16_to_cpu(hdr3->hdr.magic);
pmaxrecs = &ds->maxrecs[level];
- if (hdr3->hdr.pad != cpu_to_be16(0))
+ /* We only started zeroing the header on v5 filesystems. */
+ if (xfs_sb_version_hascrc(&ds->sc->mp->m_sb) && hdr3->hdr.pad)
xfs_scrub_da_set_corrupt(ds, level);
/* Check the owner. */
next prev parent reply other threads:[~2017-11-08 20:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-07 1:03 [PATCH 0/5] xfs: various 4.15 scrub fixes Darrick J. Wong
2017-11-07 1:03 ` [PATCH 1/5] xfs: check the uniqueness of the AGFL entries Darrick J. Wong
2017-11-09 2:08 ` Dave Chinner
2017-11-09 2:48 ` Darrick J. Wong
2017-11-09 5:02 ` [PATCH v2 " Darrick J. Wong
2017-11-09 22:12 ` Darrick J. Wong
2017-11-09 23:39 ` [PATCH v3 " Darrick J. Wong
2017-11-10 1:23 ` Dave Chinner
2017-11-07 1:03 ` [PATCH 2/5] xfs: refactor the directory data block bestfree checks Darrick J. Wong
2017-11-09 2:11 ` Dave Chinner
2017-11-07 1:03 ` [PATCH 3/5] xfs: pass inode number to xfs_scrub_ino_set_{preen, warning} Darrick J. Wong
2017-11-09 2:13 ` Dave Chinner
2017-11-07 1:03 ` [PATCH 4/5] xfs: fix uninitialized return values in scrub code Darrick J. Wong
2017-11-09 2:13 ` Dave Chinner
2017-11-07 1:03 ` [PATCH 5/5] xfs: fix btree scrub deref check Darrick J. Wong
2017-11-09 2:16 ` Dave Chinner
2017-11-08 20:56 ` Darrick J. Wong [this message]
2017-11-09 2:17 ` [PATCH 6/5] xfs: only check da node header padding on v5 filesystems Dave Chinner
2017-11-09 6:00 ` [PATCH 7/5] xfs: on failed mount, force-reclaim inodes after unmounting quota controls Darrick J. Wong
2017-11-09 23:24 ` Dave Chinner
2017-11-09 23:49 ` Darrick J. Wong
2017-11-09 23:57 ` [PATCH v2 " Darrick J. Wong
2017-11-10 1:19 ` Dave Chinner
2017-11-09 17:35 ` [PATCH 8/5] xfs: remove u_int* type usage Darrick J. Wong
2017-11-09 23:25 ` Dave Chinner
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