[src/netbsd-8]: src/sys/netipsec Pull up following revision(s) (requested by ...

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

details:   https://anonhg.NetBSD.org/src/rev/8cae070610e1
branches:  netbsd-8
changeset: 452575:8cae070610e1
user:      martin <martin%NetBSD.org@localhost>
date:      Mon Jul 15 08:18:50 2019 +0000

description:
Pull up following revision(s) (requested by maxv in ticket #1287):

        sys/netipsec/keysock.c: revision 1.69

Fix locking: it is fine if the lock is already key_so_mtx, this can happen
in socketpair. In that case don't take it.

Ok ozaki-r@

diffstat:

 sys/netipsec/keysock.c |  14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)

diffs (35 lines):

diff -r c8f5439e0d35 -r 8cae070610e1 sys/netipsec/keysock.c
--- a/sys/netipsec/keysock.c    Tue Jul 09 15:17:50 2019 +0000
+++ b/sys/netipsec/keysock.c    Mon Jul 15 08:18:50 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: keysock.c,v 1.58.2.3 2018/11/12 12:23:20 martin Exp $  */
+/*     $NetBSD: keysock.c,v 1.58.2.4 2019/07/15 08:18:50 martin Exp $  */
 /*     $FreeBSD: src/sys/netipsec/keysock.c,v 1.3.2.1 2003/01/24 05:11:36 sam Exp $    */
 /*     $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $        */
 
@@ -32,7 +32,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: keysock.c,v 1.58.2.3 2018/11/12 12:23:20 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: keysock.c,v 1.58.2.4 2019/07/15 08:18:50 martin Exp $");
 
 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
 
@@ -475,10 +475,12 @@
 
        s = splsoftnet();
 
-       KASSERT(so->so_lock == NULL);
-       mutex_obj_hold(key_so_mtx);
-       so->so_lock = key_so_mtx;
-       solock(so);
+       if (so->so_lock != key_so_mtx) {
+               KASSERT(so->so_lock == NULL);
+               mutex_obj_hold(key_so_mtx);
+               so->so_lock = key_so_mtx;
+               solock(so);
+       }
 
        error = raw_attach(so, proto, &key_rawcb);
        if (error) {