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Pavel Shilovsky authored
commit fec11dd9 caused a regression when we have already mounted //server/share/a and want to mount //server/share/a/b. The problem is that lookup_one_len calls __lookup_hash with nd pointer as NULL. Then __lookup_hash calls do_revalidate in the case when dentry exists and we end up with NULL pointer deference in cifs_d_revalidate: if (nd->flags & LOOKUP_RCU) return -ECHILD; Fix this by checking nd for NULL. Signed-off-by:
Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
3ca30d40