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tun/tap: correct ref count on cloned cdevs

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Reported and tested by:	eugen
PR:	273418
Discussed with:	jah, kevans
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D42008
This commit is contained in:
Konstantin Belousov 2023-09-21 13:47:14 +03:00
parent 792655abd6
commit 27f1ec0be2
1 changed files with 4 additions and 1 deletions
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5
sys/net/if_tuntap.c
View file

@ -548,6 +548,7 @@ tun_clone_create(struct if_clone *ifc, char *name, size_t len,
if (i != 0)
i = tun_create_device(drv, unit, NULL, &dev, name);
if (i == 0) {
dev_ref(dev);
tuncreate(dev);
struct tuntap_softc *tp = dev->si_drv1;
*ifpp = tp->tun_ifp;
@ -611,8 +612,10 @@ tunclone(void *arg, struct ucred *cred, char *name, int namelen,
i = tun_create_device(drv, u, cred, dev, name);
}
if (i == 0)
if (i == 0) {
dev_ref(*dev);
if_clone_create(name, namelen, NULL);
}
out:
CURVNET_RESTORE();
}