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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-09 16:34:32 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-09 16:36:12 -0500 |
| commit | 3c5184ef1216dd476c9c67f22a199d90ac4d5892 (patch) | |
| tree | f6bd6d77ee9d1260892c8e8589497eaa2f5efbab | |
| parent | 94bf608a18fa4421315275a81c5489734599297a (diff) | |
| download | linux-3.10-3c5184ef1216dd476c9c67f22a199d90ac4d5892.tar.gz linux-3.10-3c5184ef1216dd476c9c67f22a199d90ac4d5892.tar.bz2 linux-3.10-3c5184ef1216dd476c9c67f22a199d90ac4d5892.zip | |
ceph: d_alloc_root() may fail
... and ceph_init_dentry(NULL) will oops
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/ceph/super.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 11bd0fc4853..48f61a12af6 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -636,19 +636,26 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, req->r_num_caps = 2; err = ceph_mdsc_do_request(mdsc, NULL, req); if (err == 0) { + struct inode *inode = req->r_target_inode; + req->r_target_inode = NULL; dout("open_root_inode success\n"); - if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && + if (ceph_ino(inode) == CEPH_INO_ROOT && fsc->sb->s_root == NULL) { - root = d_alloc_root(req->r_target_inode); + root = d_alloc_root(inode); + if (!root) { + iput(inode); + root = ERR_PTR(-ENOMEM); + goto out; + } ceph_init_dentry(root); } else { - root = d_obtain_alias(req->r_target_inode); + root = d_obtain_alias(inode); } - req->r_target_inode = NULL; dout("open_root_inode success, root dentry is %p\n", root); } else { root = ERR_PTR(err); } +out: ceph_mdsc_put_request(req); return root; } |