Once we'd freed m->buf, m->count should become zero - we have no valid
contents reachable via m->buf.
Reported-by: NCharley (Hao Chuan) Chu <charley.chu@broadcom.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>