CVE-2023-53199

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: hif_usb: clean up skbs if ath9k_hif_usb_rx_stream() fails Syzkaller detected a memory leak of skbs in ath9k_hif_usb_rx_stream(). While processing skbs in ath9k_hif_usb_rx_stream(), the already allocated skbs in skb_pool are not freed if ath9k_hif_usb_rx_stream() fails. If we have an incorrect pkt_len or pkt_tag, the input skb is considered invalid and dropped. All the associated packets already in skb_pool should be dropped and freed. Added a comment describing this issue. The patch also makes remain_skb NULL after being processed so that it cannot be referenced after potential free. The initialization of hif_dev fields which are associated with remain_skb (rx_remain_len, rx_transfer_len and rx_pad_len) is moved after a new remain_skb is allocated. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

• linux linux kernel (>= 2.6.38 < 4.19.276) • linux linux kernel (>= 4.20 < 5.4.235) • linux linux kernel (>= 5.5 < 5.10.173) • linux linux kernel (>= 5.11 < 5.15.99) • linux linux kernel (>= 5.16 < 6.1.16) • linux linux kernel (>= 6.2 < 6.2.3)