]> git.baikalelectronics.ru Git - kernel.git/commit
ipc/mqueue: strengthen checks on mqueue creation
authorDoug Ledford <dledford@redhat.com>
Thu, 31 May 2012 23:26:36 +0000 (16:26 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 1 Jun 2012 00:49:31 +0000 (17:49 -0700)
commited73736244346bcbd254bc6905d035a08bd8878f
tree4a50ff35f9cc0b320985a76b5f2e8313635b0f81
parent674de5156c47c4dad06099343eeef835cf5365da
ipc/mqueue: strengthen checks on mqueue creation

We already check the mq attr struct if it's passed in, but now that the
admin can set system wide defaults separate from maximums, it's actually
possible to set the defaults to something that would overflow.  So, if
there is no attr struct passed in to the open call, check the default
values.

While we are at it, simplify mq_attr_ok() by making it return 0 or an
error condition, so that way if we add more tests to it later, we have the
option of what error should be returned instead of the calling location
having to pick a possibly inaccurate error code.

[akpm@linux-foundation.org: s/ENOMEM/EOVERFLOW/]
Signed-off-by: Doug Ledford <dledford@redhat.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Manfred Spraul <manfred@colorfullife.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ipc/mqueue.c