* [PATCH] tcp: fix possible socket refcount problem for ipv6
@ 2012-09-05 20:53 Julian Anastasov
2012-09-05 20:57 ` Eric Dumazet
0 siblings, 1 reply; 3+ messages in thread
From: Julian Anastasov @ 2012-09-05 20:53 UTC (permalink / raw)
To: David Miller; +Cc: netdev
commit 144d56e91044181ec0ef67aeca91e9a8b5718348
("tcp: fix possible socket refcount problem") is missing
the IPv6 part. As tcp_release_cb is shared by both protocols
we should hold sock reference for the TCP_MTU_REDUCED_DEFERRED
bit.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
---
net/ipv6/tcp_ipv6.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 09078b9..f3bfb8b 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -403,8 +403,9 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
tp->mtu_info = ntohl(info);
if (!sock_owned_by_user(sk))
tcp_v6_mtu_reduced(sk);
- else
- set_bit(TCP_MTU_REDUCED_DEFERRED, &tp->tsq_flags);
+ else if (!test_and_set_bit(TCP_MTU_REDUCED_DEFERRED,
+ &tp->tsq_flags))
+ sock_hold(sk);
goto out;
}
--
1.7.3.4
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] tcp: fix possible socket refcount problem for ipv6
2012-09-05 20:53 [PATCH] tcp: fix possible socket refcount problem for ipv6 Julian Anastasov
@ 2012-09-05 20:57 ` Eric Dumazet
2012-09-05 21:16 ` David Miller
0 siblings, 1 reply; 3+ messages in thread
From: Eric Dumazet @ 2012-09-05 20:57 UTC (permalink / raw)
To: Julian Anastasov; +Cc: David Miller, netdev
On Wed, 2012-09-05 at 23:53 +0300, Julian Anastasov wrote:
> commit 144d56e91044181ec0ef67aeca91e9a8b5718348
> ("tcp: fix possible socket refcount problem") is missing
> the IPv6 part. As tcp_release_cb is shared by both protocols
> we should hold sock reference for the TCP_MTU_REDUCED_DEFERRED
> bit.
>
> Signed-off-by: Julian Anastasov <ja@ssi.bg>
> ---
> net/ipv6/tcp_ipv6.c | 5 +++--
> 1 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
> index 09078b9..f3bfb8b 100644
> --- a/net/ipv6/tcp_ipv6.c
> +++ b/net/ipv6/tcp_ipv6.c
> @@ -403,8 +403,9 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
> tp->mtu_info = ntohl(info);
> if (!sock_owned_by_user(sk))
> tcp_v6_mtu_reduced(sk);
> - else
> - set_bit(TCP_MTU_REDUCED_DEFERRED, &tp->tsq_flags);
> + else if (!test_and_set_bit(TCP_MTU_REDUCED_DEFERRED,
> + &tp->tsq_flags))
> + sock_hold(sk);
> goto out;
> }
>
Thanks !
Acked-by: Eric Dumazet <edumazet@google.com>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] tcp: fix possible socket refcount problem for ipv6
2012-09-05 20:57 ` Eric Dumazet
@ 2012-09-05 21:16 ` David Miller
0 siblings, 0 replies; 3+ messages in thread
From: David Miller @ 2012-09-05 21:16 UTC (permalink / raw)
To: eric.dumazet; +Cc: ja, netdev
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 05 Sep 2012 22:57:00 +0200
> On Wed, 2012-09-05 at 23:53 +0300, Julian Anastasov wrote:
>> commit 144d56e91044181ec0ef67aeca91e9a8b5718348
>> ("tcp: fix possible socket refcount problem") is missing
>> the IPv6 part. As tcp_release_cb is shared by both protocols
>> we should hold sock reference for the TCP_MTU_REDUCED_DEFERRED
>> bit.
>>
>> Signed-off-by: Julian Anastasov <ja@ssi.bg>
...
> Acked-by: Eric Dumazet <edumazet@google.com>
Applied, thanks everyone.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2012-09-05 20:53 [PATCH] tcp: fix possible socket refcount problem for ipv6 Julian Anastasov
2012-09-05 20:57 ` Eric Dumazet
2012-09-05 21:16 ` David Miller
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