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| 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/xfs_inode.h | |
| 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/xfs_inode.h')
| -rw-r--r-- | fs/xfs/xfs_inode.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index fdb89f72db95..e96eb0835fe6 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -267,6 +267,7 @@ typedef struct xfs_inode { sema_t i_flock; /* inode flush lock */ atomic_t i_pincount; /* inode pin count */ wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */ + spinlock_t i_flags_lock; /* inode i_flags lock */ #ifdef HAVE_REFCACHE struct xfs_inode **i_refcache; /* ptr to entry in ref cache */ struct xfs_inode *i_release; /* inode to unref */ |