aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorKees Cook <keescook@chromium.org>2017-07-12 14:34:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-12 16:26:01 -0700
commit9ef5932f8a1134b9d93676ee26701b2be90c7a95 (patch)
tree3cffc8fe88d4f1c59778ebb9a4a83feba1c7f001
parent66470b18179f8839a62b4c20ffd3903a4025fe90 (diff)
download96b-common-9ef5932f8a1134b9d93676ee26701b2be90c7a95.tar.gz
ipc/msg: do not use ipc_rcu_free()
Avoid using ipc_rcu_free, since it just re-finds the original structure pointer. For the pre-list-init failure path, there is no RCU needed, since it was just allocated. It can be directly freed. Link: http://lkml.kernel.org/r/20170525185107.12869-8-manfred@colorfullife.com Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--ipc/msg.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index 0ed7dae7d4e8..25d43e27ef12 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -95,13 +95,18 @@ static inline void msg_rmid(struct ipc_namespace *ns, struct msg_queue *s)
ipc_rmid(&msg_ids(ns), &s->q_perm);
}
+static void __msg_free(struct msg_queue *msq)
+{
+ kvfree(msq);
+}
+
static void msg_rcu_free(struct rcu_head *head)
{
struct kern_ipc_perm *p = container_of(head, struct kern_ipc_perm, rcu);
struct msg_queue *msq = container_of(p, struct msg_queue, q_perm);
security_msg_queue_free(msq);
- ipc_rcu_free(head);
+ __msg_free(msq);
}
/**
@@ -131,7 +136,7 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
msq->q_perm.security = NULL;
retval = security_msg_queue_alloc(msq);
if (retval) {
- ipc_rcu_putref(&msq->q_perm, ipc_rcu_free);
+ __msg_free(msq);
return retval;
}