[rtems-libbsd commit] if_dwc: Avoid NULL pointer access

[Sebastian Huber]

Module:    rtems-libbsd
Branch:    master
Commit:    1535c87c81b7627d34d6e7604b1c798433adc36d
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=1535c87c81b7627d34d6e7604b1c798433adc36d

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Fri Mar 27 09:48:27 2015 +0100

if_dwc: Avoid NULL pointer access

---

 freebsd/sys/dev/dwc/if_dwc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/freebsd/sys/dev/dwc/if_dwc.c b/freebsd/sys/dev/dwc/if_dwc.c
index 75d4862..33240ea 100644
--- a/freebsd/sys/dev/dwc/if_dwc.c
+++ b/freebsd/sys/dev/dwc/if_dwc.c
@@ -610,7 +610,8 @@ dwc_alloc_mbufcl(struct dwc_softc *sc)
 	struct mbuf *m;
 
 	m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
-	m->m_pkthdr.len = m->m_len = m->m_ext.ext_size;
+	if (m != NULL)
+		m->m_pkthdr.len = m->m_len = m->m_ext.ext_size;
 
 	return (m);
 }