net: netprio: fd passed in SCM_RIGHTS datagram not set correctly
authorJohn Fastabend <john.r.fastabend@intel.com>
Tue, 14 Aug 2012 12:34:30 +0000 (12:34 +0000)
committerDavid S. Miller <davem@davemloft.net>
Thu, 16 Aug 2012 21:56:11 +0000 (14:56 -0700)
commit48a87cc26c13b68f6cce4e9d769fcb17a6b3e4b8
treed3b54c7b7748fecd44cdd7553c95f299cc6274f7
parentf796c20cf67aa54c9130d0dc41307c0025719b85
net: netprio: fd passed in SCM_RIGHTS datagram not set correctly

A socket fd passed in a SCM_RIGHTS datagram was not getting
updated with the new tasks cgrp prioidx. This leaves IO on
the socket tagged with the old tasks priority.

To fix this add a check in the scm recvmsg path to update the
sock cgrp prioidx with the new tasks value.

Thanks to Al Viro for catching this.

CC: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/scm.c