In eth_start_xmit, the socket buffer may be NULL. So, add NULL pointer
check at .wrap API.
Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
---
drivers/usb/gadget/function/f_eem.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/gadget/function/f_eem.c b/drivers/usb/gadget/function/f_eem.c
index d58bfc3..8741fd7 100644
--- a/drivers/usb/gadget/function/f_eem.c
+++ b/drivers/usb/gadget/function/f_eem.c
@@ -341,11 +341,15 @@ static struct sk_buff *eem_wrap(struct gether *port, struct sk_buff *skb)
{
struct sk_buff *skb2 = NULL;
struct usb_ep *in = port->in_ep;
- int padlen = 0;
+ int headroom, tailroom, padlen = 0;
u16 len = skb->len;
- int headroom = skb_headroom(skb);
- int tailroom = skb_tailroom(skb);
+ if (!skb)
+ return NULL;
+
+ len = skb->len;
+ headroom = skb_headroom(skb);
+ tailroom = skb_tailroom(skb);
/* When (len + EEM_HLEN + ETH_FCS_LEN) % in->maxpacket) is 0,
* stick two bytes of zero-length EEM packet on the end.
--
1.9.1
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