CVE-2022-50829

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: ath9k: hif_usb: Fix use-after-free in ath9k_hif_usb_reg_in_cb()<br /> <br /> It is possible that skb is freed in ath9k_htc_rx_msg(), then<br /> usb_submit_urb() fails and we try to free skb again. It causes<br /> use-after-free bug. Moreover, if alloc_skb() fails, urb-&gt;context becomes<br /> NULL but rx_buf is not freed and there can be a memory leak.<br /> <br /> The patch removes unnecessary nskb and makes skb processing more clear: it<br /> is supposed that ath9k_htc_rx_msg() either frees old skb or passes its<br /> managing to another callback function.<br /> <br /> Found by Linux Verification Center (linuxtesting.org) with Syzkaller.