NET_LOCK() for bpf(4)

[Martin Pieuchot]

ok?

Index: net/bpf.c
===================================================================
RCS file: /cvs/src/sys/net/bpf.c,v
retrieving revision 1.158
diff -u -p -r1.158 bpf.c
--- net/bpf.c   9 Jan 2017 19:15:01 -0000       1.158
+++ net/bpf.c   21 Jan 2017 00:55:26 -0000
@@ -624,9 +624,9 @@ bpfwrite(dev_t dev, struct uio *uio, int
        if (d->bd_hdrcmplt && dst.ss_family == AF_UNSPEC)
                dst.ss_family = pseudo_AF_HDRCMPLT;
 
-       s = splsoftnet();
+       NET_LOCK(s);
        error = ifp->if_output(ifp, m, (struct sockaddr *)&dst, NULL);
-       splx(s);
+       NET_UNLOCK(s);
 
 out:
        bpf_put(d);