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authorDave Chinner <dchinner@redhat.com>2016-05-18 13:54:22 +1000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-06-07 18:14:38 -0700
commitbaa7a74d6df5e67d62045ad6d7dbe1942bbbbefe (patch)
tree01d1884deb206616e3099b630472ba7275e95dde /fs/xfs
parent7dc8f21bd5afbabb086891b3a9d0930883bed793 (diff)
xfs: fix inode validity check in xfs_iflush_cluster
commit 51b07f30a71c27405259a0248206ed4e22adbee2 upstream. Some careless idiot(*) wrote crap code in commit 1a3e8f3 ("xfs: convert inode cache lookups to use RCU locking") back in late 2010, and so xfs_iflush_cluster checks the wrong inode for whether it is still valid under RCU protection. Fix it to lock and check the correct inode. (*) Careless-idiot: Dave Chinner <dchinner@redhat.com> Discovered-by: Brain Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_inode.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index af39e08859ed..611987c7542c 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3220,13 +3220,13 @@ xfs_iflush_cluster(
* We need to check under the i_flags_lock for a valid inode
* here. Skip it if it is not valid or the wrong inode.
*/
- spin_lock(&ip->i_flags_lock);
- if (!ip->i_ino ||
+ spin_lock(&iq->i_flags_lock);
+ if (!iq->i_ino ||
(XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) {
- spin_unlock(&ip->i_flags_lock);
+ spin_unlock(&iq->i_flags_lock);
continue;
}
- spin_unlock(&ip->i_flags_lock);
+ spin_unlock(&iq->i_flags_lock);
/*
* Do an un-protected check to see if the inode is dirty and