diff options
| author | Dave Chinner <dchinner@redhat.com> | 2016-05-18 13:54:22 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-07 18:14:38 -0700 |
| commit | baa7a74d6df5e67d62045ad6d7dbe1942bbbbefe (patch) | |
| tree | 01d1884deb206616e3099b630472ba7275e95dde | |
| parent | 7dc8f21bd5afbabb086891b3a9d0930883bed793 (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>
| -rw-r--r-- | fs/xfs/xfs_inode.c | 8 |
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 |