git: e900c81ede85 - stable/13 - tun/tap: correct ref count on cloned cdevs

The branch stable/13 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=e900c81ede851f52ab50b541b9a6ef5fbc9bb919

commit e900c81ede851f52ab50b541b9a6ef5fbc9bb919
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2023-09-21 10:47:14 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2023-10-16 07:17:23 +0000

    tun/tap: correct ref count on cloned cdevs
    
    PR:     273418
    
    (cherry picked from commit 27f1ec0be24b45559793e486a4fa5a2e7fdadc17)
---
 sys/net/if_tuntap.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/net/if_tuntap.c b/sys/net/if_tuntap.c
index b81c2149a62f..756aa04482cb 100644
--- a/sys/net/if_tuntap.c
+++ b/sys/net/if_tuntap.c
@@ -541,6 +541,8 @@ tun_clone_create(struct if_clone *ifc, char *name, size_t len, caddr_t params)
 	/* find any existing device, or allocate new unit number */
 	dev = NULL;
 	i = clone_create(&drv->clones, &drv->cdevsw, &unit, &dev, 0);
+	if (i == 0)
+		dev_ref(dev);
 	/* No preexisting struct cdev *, create one */
 	if (i != 0)
 		i = tun_create_device(drv, unit, NULL, &dev, name);
@@ -596,6 +598,8 @@ tunclone(void *arg, struct ucred *cred, char *name, int namelen,
 
 	/* find any existing device, or allocate new unit number */
 	i = clone_create(&drv->clones, &drv->cdevsw, &u, dev, 0);
+	if (i == 0)
+		dev_ref(*dev);
 	if (i) {
 		if (append_unit) {
 			namelen = snprintf(devname, sizeof(devname), "%s%d",