| commit | 27cb1572e3e6bb1f8cf6bb3d74c914a87b131792 | [log] [tgz] |
|---|---|---|
| author | Al Viro <viro@zeniv.linux.org.uk> | Fri Mar 18 08:29:36 2011 -0400 |
| committer | Al Viro <viro@zeniv.linux.org.uk> | Fri Mar 18 08:54:59 2011 -0400 |
| tree | 01e6510de480d3595ccff315d777770490e51f9c | |
| parent | 9d412a43c3b26e1e549319e5eec26f0829f9f74d [diff] |
fix deadlock in pivot_root() Don't hold vfsmount_lock over the loop traversing ->mnt_parent; do check_mnt(new.mnt) under namespace_sem instead; combined with namespace_sem held over all that code it'll guarantee the stability of ->mnt_parent chain all the way to the root. Doing check_mnt() outside of namespace_sem in case of pivot_root() is wrong anyway. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>