[PATCH] usb: gadget: add error handling for skb_realloc_headroom

[Zhouyang Jia]

When skb_realloc_headroom fails, the lack of error-handling code may
cause unexpected results.

This patch adds error-handling code after calling skb_realloc_headroom.

Signed-off-by: Zhouyang Jia <jiazhouyang09@xxxxxxxxx>
---
 drivers/usb/gadget/function/f_rndis.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c
index d48df36..17c164b 100644
--- a/drivers/usb/gadget/function/f_rndis.c
+++ b/drivers/usb/gadget/function/f_rndis.c
@@ -374,6 +374,9 @@ static struct sk_buff *rndis_add_header(struct gether *port,
 		return NULL;
 
 	skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type));
+	if (!skb2)
+		return NULL;
+
 	rndis_add_hdr(skb2);
 
 	dev_kfree_skb(skb);
-- 
2.7.4