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[XFS] Fix inode log item use-after-free on forced shutdown

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SGI-PV: 959388
SGI-Modid: xfs-linux-melb:xfs-kern:27805a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
This commit is contained in:
David Chinner 2007-02-10 18:36:04 +11:00 committed by Tim Shimmin
parent e5889e90dd
commit f74eaf59b3
1 changed files with 18 additions and 4 deletions
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22
fs/xfs/xfs_inode.c
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@ -2707,10 +2707,24 @@ xfs_idestroy(
ktrace_free(ip->i_dir_trace);
#endif
if (ip->i_itemp) {
/* XXXdpd should be able to assert this but shutdown
* is leaving the AIL behind. */
ASSERT(((ip->i_itemp->ili_item.li_flags & XFS_LI_IN_AIL) == 0) ||
XFS_FORCED_SHUTDOWN(ip->i_mount));
/*
* Only if we are shutting down the fs will we see an
* inode still in the AIL. If it is there, we should remove
* it to prevent a use-after-free from occurring.
*/
xfs_mount_t *mp = ip->i_mount;
xfs_log_item_t *lip = &ip->i_itemp->ili_item;
int s;
ASSERT(((lip->li_flags & XFS_LI_IN_AIL) == 0) ||
XFS_FORCED_SHUTDOWN(ip->i_mount));
if (lip->li_flags & XFS_LI_IN_AIL) {
AIL_LOCK(mp, s);
if (lip->li_flags & XFS_LI_IN_AIL)
xfs_trans_delete_ail(mp, lip, s);
else
AIL_UNLOCK(mp, s);
}
xfs_inode_item_destroy(ip);
}
kmem_zone_free(xfs_inode_zone, ip);