avoid race, avoid mbuf leak

diff --git a/sys/net/bpf.c b/sys/net/bpf.c
index a8992a3..2f0079a 100644 (file)
--- a/sys/net/bpf.c
+++ b/sys/net/bpf.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: bpf.c,v 1.5 1996/06/18 16:12:17 deraadt Exp $ */
+/*     $OpenBSD: bpf.c,v 1.6 1996/12/07 09:17:46 deraadt Exp $ */
 /*     $NetBSD: bpf.c,v 1.27 1996/05/07 05:26:02 thorpej Exp $ */
 
 /*
@@ -552,7 +552,7 @@ bpfwrite(dev, uio, ioflag)
        struct ifnet *ifp;
        struct mbuf *m;
        int error, s;
-       static struct sockaddr dst;
+       struct sockaddr dst;
 
        if (d->bd_bif == 0)
                return (ENXIO);
@@ -566,8 +566,10 @@ bpfwrite(dev, uio, ioflag)
        if (error)
                return (error);
 
-       if (m->m_pkthdr.len > ifp->if_mtu)
+       if (m->m_pkthdr.len > ifp->if_mtu) {
+               m_freem(m);
                return (EMSGSIZE);
+       }
 
        s = splsoftnet();
 #if BSD >= 199103