src/patches/suse-2.6.27.39/patches.apparmor/d_namespace_path_oops_fix.diff

   1 From: Miklos Szeredi <mszeredi@suse.cz>
   2 Subject: fix oops in d_namespace_path
   3 Patch-mainline: no
   4 References: bnc#433504
   5
   6 d_namespace_path uses the current->fs->root to get the current
   7 namespace.  If root is detached root.mnt->mnt_ns will be NULL, causing
   8 an Oops.  Fix by checking this before dereferencing the mnt_ns.
   9
  10 Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
  11 ---
  12  fs/namespace.c |    2 +-
  13  1 file changed, 1 insertion(+), 1 deletion(-)
  14
  15 --- a/fs/namespace.c
  16 +++ b/fs/namespace.c
  17 @@ -2370,7 +2370,7 @@ char *d_namespace_path(struct dentry *de
  18         path_get(&current->fs->root);
  19         read_unlock(&current->fs->lock);
  20         spin_lock(&vfsmount_lock);
  21 -       if (root.mnt)
  22 +       if (root.mnt && root.mnt->mnt_ns)
  23                 ns_root.mnt = mntget(root.mnt->mnt_ns->root);
  24         if (ns_root.mnt)
  25                 ns_root.dentry = dget(ns_root.mnt->mnt_root);