From a29c7aeb2eb3334108b14842baf99d44ef305975 Mon Sep 17 00:00:00 2001 From: "Bjoern A. Zeeb" Date: Wed, 29 Jun 2016 05:21:25 +0000 Subject: [PATCH] Several device drivers call if_alloc() and then do further checks and will cal if_free() in case of conflict, error, .. if_free() however sets the VNET instance from the ifp->if_vnet which was not yet initialized but would only in if_attach(). Fix this by setting the curvnet from where we allocate the interface in if_alloc(). if_attach() will later overwrite this as needed. We do not set the home_vnet early on as we only want to prevent the if_free() panic but not change any of the other housekeeping, e.g., triggered through ifioctl()s. Reviewed by: brooks Approved by: re (gjb) MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7010 --- sys/net/if.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sys/net/if.c b/sys/net/if.c index c351bea6ff4..0fd66c9371e 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -455,6 +455,9 @@ if_alloc(u_char type) ifp->if_index = idx; ifp->if_type = type; ifp->if_alloctype = type; +#ifdef VIMAGE + ifp->if_vnet = curvnet; +#endif if (if_com_alloc[type] != NULL) { ifp->if_l2com = if_com_alloc[type](type, ifp); if (ifp->if_l2com == NULL) {