On 1/13/22 22:54, Hangyu Hua wrote:

Any suggestions for this patch ? Guys.

I think putting sk_to_ax25 after lock_sock(sk) here will avoid any 
possilbe race conditions like other functions in ax25_proto_ops. CTING) {

As explained, your patch is not needed.

You failed to describe how a race was possible.

Just moving code around wont help.

How about providing a stack trace or some syzbot repro ?