Module: xenomai-head
Branch: master
Commit: 9300cdb3a06befc7085bf95407a22c391259701c
URL:
http://git.xenomai.org/?p=xenomai-head.git;a=commit;h=9300cdb3a06befc7085bf95407a22c391259701c
Author: Gilles Chanteperdrix <gilles.chanteperd...@xenomai.org>
Date: Tue Jun 28 21:08:06 2011 +0200
posix: fix leak in user-space named semaphores
---
ksrc/skins/posix/syscall.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/ksrc/skins/posix/syscall.c b/ksrc/skins/posix/syscall.c
index 3c7f7ee..c9e84a6 100644
--- a/ksrc/skins/posix/syscall.c
+++ b/ksrc/skins/posix/syscall.c
@@ -718,17 +718,20 @@ static int __sem_close(struct pt_regs *regs)
usm = assoc2usem(assoc);
- if ((closed = (--usm->refcnt == 0)))
+ err = sem_close(&sm.native_sem);
+
+ if (!err && (closed = (--usm->refcnt == 0)))
pse51_assoc_remove(&pse51_queues()->usems,
(u_long)sm.shadow_sem.sem);
- err = sem_close(&sm.native_sem);
-
xnlock_put_irqrestore(&pse51_assoc_lock, s);
if (err)
return -thread_get_errno();
+ if (usm->refcnt == 0)
+ xnfree(usm);
+
return __xn_safe_copy_to_user((void __user *)__xn_reg_arg2(regs),
&closed, sizeof(int));
}
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