ipc/mqueue: enforce hard limits
In two places we don't enforce the hard limits for CAP_SYS_RESOURCE apps.
In preparation for making more reasonable hard limits, start enforcing
them even on CAP_SYS_RESOURCE.
Signed-off-by: Doug Ledford <dledford@redhat.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: Amerigo Wang <amwang@redhat.com>
Cc: Joe Korty <joe.korty@ccur.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index b103022..6e10a55 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -301,8 +301,9 @@
error = -EACCES;
goto out_unlock;
}
- if (ipc_ns->mq_queues_count >= ipc_ns->mq_queues_max &&
- !capable(CAP_SYS_RESOURCE)) {
+ if (ipc_ns->mq_queues_count >= HARD_QUEUESMAX ||
+ (ipc_ns->mq_queues_count >= ipc_ns->mq_queues_max &&
+ !capable(CAP_SYS_RESOURCE))) {
error = -ENOSPC;
goto out_unlock;
}
@@ -589,7 +590,8 @@
if (attr->mq_maxmsg <= 0 || attr->mq_msgsize <= 0)
return 0;
if (capable(CAP_SYS_RESOURCE)) {
- if (attr->mq_maxmsg > HARD_MSGMAX)
+ if (attr->mq_maxmsg > HARD_MSGMAX ||
+ attr->mq_msgsize > HARD_MSGSIZEMAX)
return 0;
} else {
if (attr->mq_maxmsg > ipc_ns->mq_msg_max ||