[src/trunk]: src/sys/arch/arm/allwinner NULL-check after M_DONTWAIT.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e9d783805172
branches:  trunk
changeset: 359483:e9d783805172
user:      maxv <maxv%NetBSD.org@localhost>
date:      Mon Feb 12 16:58:01 2018 +0000

description:
NULL-check after M_DONTWAIT.

diffstat:

 sys/arch/arm/allwinner/awin_eth.c |  5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diffs (22 lines):

diff -r 71544719b75e -r e9d783805172 sys/arch/arm/allwinner/awin_eth.c
--- a/sys/arch/arm/allwinner/awin_eth.c Mon Feb 12 16:01:35 2018 +0000
+++ b/sys/arch/arm/allwinner/awin_eth.c Mon Feb 12 16:58:01 2018 +0000
@@ -31,7 +31,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(1, "$NetBSD: awin_eth.c,v 1.11 2016/06/10 13:27:10 ozaki-r Exp $");
+__KERNEL_RCSID(1, "$NetBSD: awin_eth.c,v 1.12 2018/02/12 16:58:01 maxv Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -401,6 +401,9 @@
 {
        struct mbuf *m = m_gethdr(M_DONTWAIT, MT_DATA);
 
+       if (m == NULL) {
+               return NULL;
+       }
        if (rxlen + 2 > MHLEN) {
                MCLGET(m, M_DONTWAIT);
                if ((m->m_flags & M_EXT) == 0) {