svn commit: r338992 - stable/11/sys/dev/ffec

[Andrey V. Elsukov]

Author: ae
Date: Fri Sep 28 10:02:47 2018
New Revision: 338992
URL: https://svnweb.freebsd.org/changeset/base/338992

Log:
  MFC r338857:
    Fix possible NULL pointer dereference in ffec_alloc_mbufcl().
  
    PR:		231514

Modified:
  stable/11/sys/dev/ffec/if_ffec.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/dev/ffec/if_ffec.c
==============================================================================
--- stable/11/sys/dev/ffec/if_ffec.c	Fri Sep 28 00:01:45 2018	(r338991)
+++ stable/11/sys/dev/ffec/if_ffec.c	Fri Sep 28 10:02:47 2018	(r338992)
@@ -799,7 +799,8 @@ ffec_alloc_mbufcl(struct ffec_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);
 }