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From: Samuel Ortiz <samuel-jcdQHdrhKHMdnm+yROfE0A@public.gmane.org>
To: "Paul E. McKenney"
	<paulmck-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>,
	"David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
	Josh Triplett <josht-DhXWPJtHtuFWk0Htik3J/w@public.gmane.org>
Cc: Andrew Morton <akpm-3NddpPZAyC0@public.gmane.org>,
	netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	irda-users-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Dipkanar Sarma <dipankar-xthvdsQ13ZrQT0dZR+AlfA@public.gmane.org>
Subject: [PATCH 1/2] [IrDA] Fix RCU lock pairing on error path
Date: Fri, 30 Jun 2006 09:55:34 +0300	[thread overview]
Message-ID: <20060630065534.GA4729@sortiz.org> (raw)
In-Reply-To: <20060629142741.GA1294-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>

Hi Dave,

irlan_client_discovery_indication calls rcu_read_lock and rcu_read_unlock, but
returns without unlocking in an error case.  Fix that by replacing the return
with a goto so that the rcu_read_unlock always gets executed.

Signed-off-by: Josh Triplett <josh-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org>
Acked-by: Paul E. McKenney <paulmck-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Signed-off-by: Samuel Ortiz samuel-jcdQHdrhKHMdnm+yROfE0A@public.gmane.org <>
---
 net/irda/irlan/irlan_client.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/net/irda/irlan/irlan_client.c b/net/irda/irlan/irlan_client.c
index f8e6cb0..95cf123 100644
--- a/net/irda/irlan/irlan_client.c
+++ b/net/irda/irlan/irlan_client.c
@@ -173,13 +173,14 @@ void irlan_client_discovery_indication(d
 	rcu_read_lock();
 	self = irlan_get_any();
 	if (self) {
-		IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
+		IRDA_ASSERT(self->magic == IRLAN_MAGIC, goto out;);
 
 		IRDA_DEBUG(1, "%s(), Found instance (%08x)!\n", __FUNCTION__ ,
 		      daddr);
 		
 		irlan_client_wakeup(self, saddr, daddr);
 	}
+IRDA_ASSERT_LABEL(out:)
 	rcu_read_unlock();
 }
 	
-- 
1.4.0


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       reply	other threads:[~2006-06-30  6:55 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1151542602.18723.19.camel@josh-work.beaverton.ibm.com>
     [not found] ` <20060629142741.GA1294@us.ibm.com>
     [not found]   ` <20060629142741.GA1294-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2006-06-30  6:55     ` Samuel Ortiz [this message]
     [not found]       ` <20060630065534.GA4729-jcdQHdrhKHMdnm+yROfE0A@public.gmane.org>
2006-06-30  0:02         ` [PATCH 1/2] [IrDA] Fix RCU lock pairing on error path David Miller

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