[src/trunk]: src/sys/uvm Woah man, fix enormous leak.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/04a4675d0fe9
branches:  trunk
changeset: 445872:04a4675d0fe9
user:      maxv <maxv%NetBSD.org@localhost>
date:      Thu Nov 15 14:19:23 2018 +0000

description:
Woah man, fix enormous leak.

        Possible info leak: [len=1056, leaked=931]
        #0 0xffffffff80bad351 in kleak_copyout
        #1 0xffffffff80b2cf64 in uvm_swap_stats.part.1
        #2 0xffffffff80b2d38d in uvm_swap_stats
        #3 0xffffffff80b2d43c in sys_swapctl
        #4 0xffffffff80259b82 in syscall

diffstat:

 sys/uvm/uvm_swap.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r 1d63cca03530 -r 04a4675d0fe9 sys/uvm/uvm_swap.c
--- a/sys/uvm/uvm_swap.c        Thu Nov 15 13:50:51 2018 +0000
+++ b/sys/uvm/uvm_swap.c        Thu Nov 15 14:19:23 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_swap.c,v 1.177 2018/03/15 03:21:58 christos Exp $  */
+/*     $NetBSD: uvm_swap.c,v 1.178 2018/11/15 14:19:23 maxv Exp $      */
 
 /*
  * Copyright (c) 1995, 1996, 1997, 2009 Matthew R. Green
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_swap.c,v 1.177 2018/03/15 03:21:58 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_swap.c,v 1.178 2018/11/15 14:19:23 maxv Exp $");
 
 #include "opt_uvmhist.h"
 #include "opt_compat_netbsd.h"
@@ -744,6 +744,7 @@
                        inuse = btodb((uint64_t)sdp->swd_npginuse <<
                            PAGE_SHIFT);
 
+                       memset(&sep, 0, sizeof(sep));
                        swapent_cvt(&sep, sdp, inuse);
                        if (f)
                                (*f)(&sep, &sep);