[PATCH] fs/locks.c: Fix lease_init (CVE-2006-1860)

[PATCH] fs/locks.c: Fix lease_init (CVE-2006-1860)

It is insane to be giving lease_init() the task of freeing the lock it is
supposed to initialise, given that the lock is not guaranteed to be
allocated on the stack. This causes lockups in fcntl_setlease().
Problem diagnosed by Daniel Hokka Zakrisson <daniel@hozac.com>

Also fix a slab leak in __setlease() due to an uninitialised return value.
Problem diagnosed by Björn Steinbrink.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Daniel Hokka Zakrisson <daniel@hozac.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Cc: Björn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>