Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: htc_hst: free skb in ath9k_htc_rx_msg() if there is no callback function It is stated that ath9k_htc_rx_msg() either frees the provided skb or passes its management to another callback function. However, the skb is not freed in case there is no another callback function, and Syzkaller was able to cause a memory leak. Also minor comment fix. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

References 8

• git.kernel.org https://git.kernel.org/stable/c/564bc2222bf50eb6cdee715a5431bf4dc9f923c1
• git.kernel.org https://git.kernel.org/stable/c/5a84e51f72580fc70066b03f3dac38421e702a0b
• git.kernel.org https://git.kernel.org/stable/c/68171c006c8645a3e0293a6c3e6037c6538ac1c5
• git.kernel.org https://git.kernel.org/stable/c/9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69
• git.kernel.org https://git.kernel.org/stable/c/b11f95f65cc52ee3a756e6f6a88df37a203e25bd
• git.kernel.org https://git.kernel.org/stable/c/bbfababb4f899fe1556eac195f9774b6fe675fb6
• git.kernel.org https://git.kernel.org/stable/c/c0c0614f143b568cd0e9525d53cf12e5dcd11987
• git.kernel.org https://git.kernel.org/stable/c/ec246dfe006b2a8f36353f7489e4f525114db9a5

Remediation