caif: Bugfix - handle mem-allocation failures

Discovered bugs when injecting slab allocation failures.
Add checks on all memory allocation.

Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/caif/cfserl.c b/net/caif/cfserl.c
index 06029ea2da2f..cb4325a3dc83 100644
--- a/net/caif/cfserl.c
+++ b/net/caif/cfserl.c
@@ -67,6 +67,8 @@ static int cfserl_receive(struct cflayer *l, struct cfpkt *newpkt)
                 layr->incomplete_frm =
                     cfpkt_append(layr->incomplete_frm, newpkt, expectlen);
                 pkt = layr->incomplete_frm;
+                if (pkt == NULL)
+                        return -ENOMEM;
         } else {
                 pkt = newpkt;
         }
@@ -154,7 +156,6 @@ static int cfserl_receive(struct cflayer *l, struct cfpkt *newpkt)
                         if (layr->usestx) {
                                 if (tail_pkt != NULL)
                                         pkt = cfpkt_append(pkt, tail_pkt, 0);
-
                                 /* Start search for next STX if frame failed */
                                 continue;
                         } else {