Manfred Spraul wrote:
Hi Linus,
Two smp_wmb() statements are missing in the sysv sem code: This could
cause stack corruptions.
The attached patch adds them.
Signed-Off-By: Manfred Spraul <[email protected]>
------------------------------------------------------------------------
--- 2.6/ipc/sem.c 2005-12-19 01:36:54.000000000 +0100
+++ build-2.6/ipc/sem.c 2005-12-23 23:25:17.000000000 +0100
@@ -381,6 +381,7 @@
/* hands-off: q will disappear immediately after
* writing q->status.
*/
+ smb_wmb();
Typo? Shouldn't it be smp_wmb();
q->status = error;
q = n;
} else {
@@ -461,6 +462,7 @@
n = q->next;
q->status = IN_WAKEUP;
wake_up_process(q->sleeper); /* doesn't sleep */
+ smp_wmb();
q->status = -EIDRM; /* hands-off q */
q = n;
}
-
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