[PATCH] Bluetooth: fix potential NULL ptr deref in dtl1_cs.c::dtl1_hci_send_frame()

[Jesper Juhl <jesper.juhl@gmail.com>]

There's a problem in drivers/bluetooth/dtl1_cs.c::dtl1_hci_send_frame()

If bt_skb_alloc() returns NULL, then skb_reserve(s, NSHL); will cause a
NULL pointer deref - ouch.
If we can't allocate the resources we require we need to tell the caller
by returning -ENOMEM.

Found by the coverity checker as bug #409

Patch is compile tested, but that's all, due to lack of hardware.


Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
---

 drivers/bluetooth/dtl1_cs.c |    3 +++
 1 files changed, 3 insertions(+)

--- linux-2.6.17-rc3-git12-orig/drivers/bluetooth/dtl1_cs.c	2006-05-07 03:25:16.000000000 +0200
+++ linux-2.6.17-rc3-git12/drivers/bluetooth/dtl1_cs.c	2006-05-07 20:43:01.000000000 +0200
@@ -423,6 +423,9 @@ static int dtl1_hci_send_frame(struct sk
 	nsh.len = skb->len;
 
 	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
+	if (!s)
+		return -ENOMEM;
+
 	skb_reserve(s, NSHL);
 	memcpy(skb_put(s, skb->len), skb->data, skb->len);
 	if (skb->len & 0x0001)