fix possible NULL deref on low memory condition in capidrv.c::send_message()

[cascardo/linux.git] / drivers / isdn / capi / capidrv.c

diff --git a/drivers/isdn/capi/capidrv.c b/drivers/isdn/capi/capidrv.c
index 23b6f7b..476012b 100644 (file)
--- a/drivers/isdn/capi/capidrv.c
+++ b/drivers/isdn/capi/capidrv.c
@@ -506,9 +506,14 @@ static void send_message(capidrv_contr * card, _cmsg * cmsg)
 {
        struct sk_buff *skb;
        size_t len;
+
        capi_cmsg2message(cmsg, cmsg->buf);
        len = CAPIMSG_LEN(cmsg->buf);
        skb = alloc_skb(len, GFP_ATOMIC);
+       if (!skb) {
+               printk(KERN_ERR "capidrv::send_message: can't allocate mem\n");
+               return;
+       }
        memcpy(skb_put(skb, len), cmsg->buf, len);
        if (capi20_put_message(&global.ap, skb) != CAPI_NOERROR)
                kfree_skb(skb);