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staging: wilc1000: fix unchecked return value
Function dev_alloc_skb() will return a NULL pointer if there is no enough memory. However, in function WILC_WFI_mon_xmit(), its return value is used without validation. This may result in a bad memory access bug. This patch fixes the bug. Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -197,6 +197,8 @@ static netdev_tx_t WILC_WFI_mon_xmit(struct sk_buff *skb,
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if (skb->data[0] == 0xc0 && (!(memcmp(broadcast, &skb->data[4], 6)))) {
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skb2 = dev_alloc_skb(skb->len + sizeof(struct wilc_wfi_radiotap_cb_hdr));
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if (!skb2)
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return -ENOMEM;
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memcpy(skb_put(skb2, skb->len), skb->data, skb->len);
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