[XFS] fix inode leak in xfs_iget_core()

If the radix_tree_preload() fails, we need to destroy the inode we just
read in before trying again. This could leak xfs_vnode structures when
there is memory pressure. Noticed by Christoph Hellwig.

SGI-PV: 977823
SGI-Modid: xfs-linux-melb:xfs-kern:30606a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>

diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index f01b07687faf93103ff7964f266607b3a6a3ce17..8e09b71f4104a91e0e6e2ba00ce8384d1b780499 100644 (file)
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -235,6 +235,7 @@ finish_inode:
         */
        new_icl = kmem_zone_alloc(xfs_icluster_zone, KM_SLEEP);
        if (radix_tree_preload(GFP_KERNEL)) {
+               xfs_idestroy(ip);
                delay(1);
                goto again;
        }