[rtems-libbsd commit] ffec: Fix NULL pointer access

[Sebastian Huber]

Module:    rtems-libbsd
Branch:    master
Commit:    798d308be877078f269f52a1df71f8926202cdf6
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=798d308be877078f269f52a1df71f8926202cdf6

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Tue Oct 24 14:11:56 2017 +0200

ffec: Fix NULL pointer access

Update #3090.

---

 freebsd/sys/dev/ffec/if_ffec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/freebsd/sys/dev/ffec/if_ffec.c b/freebsd/sys/dev/ffec/if_ffec.c
index 5801312..07b8c34 100644
--- a/freebsd/sys/dev/ffec/if_ffec.c
+++ b/freebsd/sys/dev/ffec/if_ffec.c
@@ -788,6 +788,9 @@ ffec_alloc_mbufcl(struct ffec_softc *sc)
 	struct mbuf *m;
 
 	m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
+	if (m == NULL)
+		return (m);
+
 	m->m_pkthdr.len = m->m_len = m->m_ext.ext_size;
 #ifdef __rtems__
 	rtems_cache_invalidate_multiple_data_lines(m->m_data, m->m_len);