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CVE request -- kernel: cifs: always do is_path_accessible check in cifs_mount
From: Petr Matousek <pmatouse () redhat com>
Date: Wed, 14 Sep 2011 16:09:27 +0200

"Currently, we skip doing the is_path_accessible check in cifs_mount if
there is no prefixpath. There is a report of at least one server however
that allows a TREE_CONNECT to a share that has a DFS referral at its
root. UNC that had no prefixpath was used in that case, so the
is_path_accessible check was not triggered and the box later hit
a BUG() because we were chasing a DFS referral on the root dentry for
the mount."

Upstream fix:


Petr Matousek / Red Hat Security Response Team

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