nfsd: fix crash on LOCKT on reexported NFSv3

[ Upstream commit 0bcc7ca40bd823193224e9f38bafbd8325aaf566 ]

Unlike other filesystems, NFSv3 tries to use fl_file in the GETLK case.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
1 file changed