From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org,
linux-rt-users <linux-rt-users@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Carsten Emde <C.Emde@osadl.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
John Kacur <jkacur@redhat.com>, <stable-rt@vger.kernel.org>,
Mike Galbraith <bitbucket@online.de>,
Eric Dumazet <edumazet@google.com>
Subject: [PATCH RT 1/5] tcp: force a dst refcount when prequeue packet
Date: Fri, 03 May 2013 17:37:04 -0400 [thread overview]
Message-ID: <20130503213817.778015700@goodmis.org> (raw)
In-Reply-To: <20130503213703.521223574@goodmis.org>
[-- Attachment #1: 0001-tcp-force-a-dst-refcount-when-prequeue-packet.patch --]
[-- Type: text/plain, Size: 910 bytes --]
From: Eric Dumazet <edumazet@google.com>
Before escaping RCU protected section and adding packet into
prequeue, make sure the dst is refcounted.
Cc: stable-rt@vger.kernel.org
Reported-by: Mike Galbraith <bitbucket@online.de>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
include/net/tcp.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 1f000ff..9297897 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1015,6 +1015,7 @@ static inline bool tcp_prequeue(struct sock *sk, struct sk_buff *skb)
if (sysctl_tcp_low_latency || !tp->ucopy.task)
return false;
+ skb_dst_force(skb);
__skb_queue_tail(&tp->ucopy.prequeue, skb);
tp->ucopy.memory += skb->truesize;
if (tp->ucopy.memory > sk->sk_rcvbuf) {
--
1.7.10.4
next prev parent reply other threads:[~2013-05-03 21:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-03 21:37 [PATCH RT 0/5] [ANNOUNCE] 3.6.11.2-rt34-rc1 Steven Rostedt
2013-05-03 21:37 ` Steven Rostedt [this message]
2013-05-03 21:37 ` [PATCH RT 2/5] x86/mce: Defer mce wakeups to threads for PREEMPT_RT Steven Rostedt
2013-05-03 21:37 ` [PATCH RT 3/5] powerpc/64bit,PREEMPT_RT: Check preempt_count before preempting Steven Rostedt
2013-05-03 21:37 ` [PATCH RT 4/5] swap: Use unique local lock name for swap_lock Steven Rostedt
2013-05-03 21:37 ` [PATCH RT 5/5] Linux 3.6.11.2-rt34-rc1 Steven Rostedt
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