Re: [PATCH] linux 2.9.10-rc1: Fix oops in unix_dgram_sendmsg when using SELinux and SOCK_SEQPACKET

[Arnaldo Carvalho de Melo <acme@conectiva.com.br>]

Chris Wright wrote:
> * Ross Kendall Axe (ross.axe@blueyonder.co.uk) wrote:
> 
>>Taking this idea further, couldn't we split unix_dgram_sendmsg into 2 
>>functions, do_unix_dgram_sendmsg and do_unix_connectionless_sendmsg (and 
>>similarly for unix_stream_sendmsg), then all we'd need is:
>>
>><pseudocode>
>>static int do_unix_dgram_sendmsg(...);
>>static int do_unix_stream_sendmsg(...);
>>static int do_unix_connectionless_sendmsg(...);
>>static int do_unix_connectional_sendmsg(...);
> 
> 
> We could probably break it down to better functions and helpers, but I'm
> not sure that's quite the breakdown.  That looks to me like an indirect
> way to pass a flag which is already encoded in the ops and sk_type.
> At anyrate, for 2.6.10 the changes should be small and obvious.
> Better refactoring should be left for 2.6.11.

Hey, go ahead, do the split and please, please use sk->sk_prot, that is
the way to do the proper split and will allow us to nuke several
pointers in struct sock (sk_slab, sk_owner for now) :-)

I have a friend doing this for X.25, will submit his patches as soon
as we do some more testing and 2.6.10 is out.

- Arnaldo