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diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c
--- a/sys/net/if_ethersubr.c
+++ b/sys/net/if_ethersubr.c
@@ -989,8 +989,11 @@
sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr);
uuid_ether_del(LLADDR(sdl));
+ /* XXXZL: Workaround bpfdetach() race */
+ sx_xlock(&ifnet_detach_sxlock);
bpfdetach(ifp);
if_detach(ifp);
+ sx_xunlock(&ifnet_detach_sxlock);
}
SYSCTL_DECL(_net_link);

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