CVE-2022-48794

In the Linux kernel, the following vulnerability has been resolved:

net: ieee802154: at86rf230: Stop leaking skbs

Upon error the ieee802154_xmit_complete() helper is not called. Only ieee802154_wake_queue() is called manually. In the Tx case we then leak the skb structure.

Free the skb structure upon error before returning when appropriate.

As the is_tx = 0 cannot be moved in the complete handler because of a possible race between the delay in switching to STATE_RX_AACK_ON and a new interrupt, we introduce an intermediate was_tx boolean just for this purpose.

There is no Fixes tag applying here, many changes have been made on this area and the issue kind of always existed.

Affected Software

References

• https://git.kernel.org/stable/c/0fd484644c68897c490a3307bfcc8bf767df5a43
• https://git.kernel.org/stable/c/1c72f04d52b7200bb83426a9bed378668271ea4a
• https://git.kernel.org/stable/c/23b2a25382400168427ea278f3d8bf4ecfd333bf
• https://git.kernel.org/stable/c/455ef08d6e5473526fa6763f75a93f7198206966
• https://git.kernel.org/stable/c/6312f6a53fd3ea38125dcaca5e3c9aa7d8a60cf7
• https://git.kernel.org/stable/c/af649e5c95f56df64363bc46f6746b87819f9c0d
• https://git.kernel.org/stable/c/d2a1eaf51b7d4412319adb6acef114ba472d1692
• https://git.kernel.org/stable/c/e5ce576d45bf72fd0e3dc37eff897bfcc488f6a9