This fixes a security problem in ksmbd. It currently has the
ZDI-CAN-18259 ID assigned, but no CVE yet.
Backported from:
8824b7af40cc4f3b5a6a
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 76c67fcc66116381c69439f20159b636573080ba)