git: 8a727c3df89a - main - mroute: add missing WUNLOCK

The branch main has been updated by wma:

URL: https://cgit.FreeBSD.org/src/commit/?id=8a727c3df89acd02050b849a916e49ae447c1d9d

commit 8a727c3df89acd02050b849a916e49ae447c1d9d
Author:     Wojciech Macek <wma@FreeBSD.org>
AuthorDate: 2021-10-28 04:59:37 +0000
Commit:     Wojciech Macek <wma@FreeBSD.org>
CommitDate: 2021-10-28 05:12:23 +0000

    mroute: add missing WUNLOCK
    
    Add missing WNLOCK as in all other error cases.
    
    Reported by:            Stormshield
    Obtained from:          Semihalf
---
 sys/netinet/ip_mroute.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/netinet/ip_mroute.c b/sys/netinet/ip_mroute.c
index c992743a503e..02738616d56e 100644
--- a/sys/netinet/ip_mroute.c
+++ b/sys/netinet/ip_mroute.c
@@ -713,8 +713,10 @@ ip_mrouter_init(struct socket *so, int version)
     mtx_init(&V_bw_upcalls_ring_mtx, "mroute upcall buf_ring mtx", NULL, MTX_DEF);
     V_bw_upcalls_ring = buf_ring_alloc(BW_UPCALLS_MAX, M_MRTABLE,
 	M_NOWAIT, &V_bw_upcalls_ring_mtx);
-    if (!V_bw_upcalls_ring)
+    if (!V_bw_upcalls_ring) {
+	MRW_WUNLOCK();
 	return (ENOMEM);
+    }
 
     /* Create upcall thread */
     upcall_thread_shutdown = 0;