Re: memory leak in do_ipv6_setsockopt

[Eric Dumazet]

On Tue, 2015-12-01 at 15:24 +0100, Daniel Borkmann wrote:
> On 12/01/2015 03:16 PM, Eric Dumazet wrote:
> > On Tue, 2015-12-01 at 15:07 +0100, Daniel Borkmann wrote:
> >
> >> Yeah, we miss inet6_destroy_sock() in SCTP. :-(
> >>
> >> Looks good to me.
> >
> > OK, I will send a formal (and tested ;) ) patch.
> 
> I was shortly wondering whether there could be a use-after-free by
> doing this after sctp_destroy_sock() due to the sctp_endpoint_destroy()
> that would eventually drop a ref on the socket, but the endpoint holds
> a separate ref, so we should be good.
> 

More generically ->destroy() caller must keep a reference on the socket.

inet_csk_destroy_sock() for example uses sk after

sk->sk_prot->destroy(sk);



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/