From 0f5748b23567df4aabbd12b5ac59c6f5ce2ddb71 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Sun, 17 Sep 2017 14:06:27 -0700
Subject: [PATCH] xfs: disable per-inode DAX flag
Git-commit: 742d84290739ae908f1b61b7d17ea382c8c0073a
Patch-mainline: v4.14-rc1
References: bsc#1085535
Stable-commit: 0f5748b23567df4aabbd12b5ac59c6f5ce2ddb71
commit 742d84290739ae908f1b61b7d17ea382c8c0073a upstream.
Currently flag switching can be used to easily crash the kernel. Disable
the per-inode DAX flag until that is sorted out.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
---
fs/xfs/xfs_ioctl.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 9c0c7a920304..06ca244c323a 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1008,11 +1008,12 @@ xfs_diflags_to_linux(
inode->i_flags |= S_NOATIME;
else
inode->i_flags &= ~S_NOATIME;
+#if 0 /* disabled until the flag switching races are sorted out */
if (xflags & FS_XFLAG_DAX)
inode->i_flags |= S_DAX;
else
inode->i_flags &= ~S_DAX;
-
+#endif
}
static int
--
2.16.2