On Tue, Feb 2, 2016 at 12:32 PM, Hannes Frederic Sowa
<han...@stressinduktion.org> wrote:
>
> Unfortunately we never transfer a scm_cookie via the skbs but merely use it
> to initialize unix_skb_parms structure in skb->cb and destroy it afterwards.
Ok, I obviously didn't check very closely.
> But "struct pid *" in unix_skb_parms should be enough to get us to
> corresponding "struct cred *" so we can decrement the correct counter during
> skb destruction.
Umm. I think the "struct cred" may change in between, can't it?
So I don't think you can later look up the cred based on the pid.
Could we add the cred pointer (or just the user pointer) to the unix_skb_parms?
Or maybe just add it to the "struct scm_fp_list"?
Linus
