tree 61a5e5b353be80e092795e357863509861a6a774
parent 5c80f1ae9842a8b7985acd0f02efb9828effb05f
author Pavel Emelyanov <xemul@openvz.org> 1194761310 -0800
committer David S. Miller <davem@davemloft.net> 1194761310 -0800

[UNIX]: The unix_nr_socks limit can be exceeded

The unix_nr_socks value is limited with the 2 * get_max_files() value,
as seen from the unix_create1(). However, the check and the actual
increment are separated with the GFP_KERNEL allocation, so this limit
can be exceeded under a memory pressure - task may go to sleep freeing
the pages and some other task will be allowed to allocate a new sock
and so on and so forth.

So make the increment before the check (similar thing is done in the
sock_kmalloc) and go to kmalloc after this.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>