Re: git: e3044071dec1 - main - in6p_set_multicast_if(): fix malloc(M_WAITOK) with epoch

[Hans Petter Selasky]

On 12/6/21 23:36, Gleb Smirnoff wrote:

diff --git a/sys/netinet6/in6_mcast.c b/sys/netinet6/in6_mcast.c
index b1b161ace1b8..d0f8186e75c7 100644
--- a/sys/netinet6/in6_mcast.c
+++ b/sys/netinet6/in6_mcast.c
@@ -2454,9 +2454,9 @@ in6p_set_multicast_if(struct inpcb *inp, struct sockopt 
*sopt)
                        return (EADDRNOTAVAIL);
                }
        }
+       NET_EPOCH_EXIT(et);     /* XXXGL: unsafe ifp */
        imo = in6p_findmoptions(inp);
-       imo->im6o_multicast_ifp = ifp;       /* XXXGL: reference?! */
-       NET_EPOCH_EXIT(et);
+       imo->im6o_multicast_ifp = ifp;
        INP_WUNLOCK(inp);

return (0);

You can ref the ifp before the EPOCH exit?

--HPS