kernel: wifi: ath9k: hif_usb: Fix use-after-free in ath9k_hif_usb_reg_in_cb()

A flaw was found in the ath9k USB Wi-Fi driver in the Linux kernel. In certain conditions within the ath9khifusbregincb path, a socket buffer skb may be freed prematurely and then freed again on an error path, leading to a use-after-free condition. Additionally, failure to allocate a new skb can...