ceph: protect access to d_parent

[pandora-kernel.git] / fs / ceph / inode.c

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 2717dc4..a7db56f 100644 (file)
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1562,7 +1562,7 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr)
 {
        struct inode *inode = dentry->d_inode;
        struct ceph_inode_info *ci = ceph_inode(inode);
-       struct inode *parent_inode = dentry->d_parent->d_inode;
+       struct inode *parent_inode;
        const unsigned int ia_valid = attr->ia_valid;
        struct ceph_mds_request *req;
        struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
@@ -1745,7 +1745,9 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr)
                req->r_inode_drop = release;
                req->r_args.setattr.mask = cpu_to_le32(mask);
                req->r_num_caps = 1;
+               parent_inode = ceph_get_dentry_parent_inode(dentry);
                err = ceph_mdsc_do_request(mdsc, parent_inode, req);
+               iput(parent_inode);
        }
        dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
             ceph_cap_string(dirtied), mask);