PERFORCE change 107430 for review
Roman Divacky
rdivacky at FreeBSD.org
Sat Oct 7 10:14:56 PDT 2006
http://perforce.freebsd.org/chv.cgi?CH=107430
Change 107430 by rdivacky at rdivacky_witten on 2006/10/07 17:14:07
Fix use-after-free. I want to refcount the new undo struct.
Noticed by: netchild
Affected files ...
.. //depot/projects/linuxolator/src/sys/kern/sysv_sem.c#5 edit
Differences ...
==== //depot/projects/linuxolator/src/sys/kern/sysv_sem.c#5 (text+ko) ====
@@ -1272,10 +1272,10 @@
refcount_release(&p->p_semundo->refcount);
if (p->p_semundo->refcount == 0)
free(p->p_semundo, M_SEM);
- refcount_acquire(&p->p_semundo->refcount);
PROC_LOCK(p);
p->p_semundo = SLIST_NEXT(suptr, un_next);
PROC_UNLOCK(p);
+ refcount_acquire(&p->p_semundo->refcount);
}
static int
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