diff options
| author | David Chinner <dgc@sgi.com> | 2006-09-28 11:06:03 +1000 |
|---|---|---|
| committer | Tim Shimmin <tes@sgi.com> | 2006-09-28 11:06:03 +1000 |
| commit | f273ab848b7cbc0088b0ac7457b3769e6566074e (patch) | |
| tree | 27f1b0ce7b056f77e7105284524cbdb658943ae5 /fs/xfs/linux-2.6 | |
| parent | 01106eae97b70399ce5a273a3cceb5246e8d9cc8 (diff) | |
| download | lwn-f273ab848b7cbc0088b0ac7457b3769e6566074e.tar.gz lwn-f273ab848b7cbc0088b0ac7457b3769e6566074e.zip | |
[XFS] Really fix use after free in xfs_iunpin.
The previous attempts to fix the linux inode use-after-free in xfs_iunpin
simply made the problem harder to hit. We actually need complete exclusion
between xfs_reclaim and xfs_iunpin, as well as ensuring that the i_flags
are consistent during both of these functions. Introduce a new spinlock
for exclusion and the i_flags, and fix up xfs_iunpin to use igrab before
marking the inode dirty.
SGI-PV: 952967
SGI-Modid: xfs-linux-melb:xfs-kern:26964a
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_super.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index 9df9ed37d219..38c4d128a8c0 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -227,7 +227,9 @@ xfs_initialize_vnode( xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip); xfs_set_inodeops(inode); + spin_lock(&ip->i_flags_lock); ip->i_flags &= ~XFS_INEW; + spin_unlock(&ip->i_flags_lock); barrier(); unlock_new_inode(inode); |