diff mbox

[v3,1/2] ip_tunnel: fix potential issue in ip_tunnel_rcv

Message ID 1496896364-27153-1-git-send-email-yanhaishuang@cmss.chinamobile.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Haishuang Yan June 8, 2017, 4:32 a.m. UTC
When ip_tunnel_rcv fails, the tun_dst won't be freed, so call
dst_release to free it in error code path.

CC: Pravin B Shelar <pshelar@nicira.com>
Fixes: 2e15ea390e6f ("ip_gre: Add support to collect tunnel metadata.")
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>

---
Changes in v2:
  - Add the the missing Fixes information
Changes in v3:
  - Free tun_dst from error code path
---
 net/ipv4/ip_tunnel.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Eric Dumazet June 8, 2017, 4:54 a.m. UTC | #1
On Thu, 2017-06-08 at 12:32 +0800, Haishuang Yan wrote:
> When ip_tunnel_rcv fails, the tun_dst won't be freed, so call
> dst_release to free it in error code path.
> 
> CC: Pravin B Shelar <pshelar@nicira.com>
> Fixes: 2e15ea390e6f ("ip_gre: Add support to collect tunnel metadata.")
> Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
> 
> ---
> Changes in v2:
>   - Add the the missing Fixes information
> Changes in v3:
>   - Free tun_dst from error code path
> ---
>  net/ipv4/ip_tunnel.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
> index b878ecb..0f1d876 100644
> --- a/net/ipv4/ip_tunnel.c
> +++ b/net/ipv4/ip_tunnel.c
> @@ -446,6 +446,8 @@ int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
>  	return 0;
>  
>  drop:
> +	if (tun_dst)
> +		dst_release((struct dst_entry *)tun_dst);
>  	kfree_skb(skb);
>  	return 0;
>  }

Acked-by: Eric Dumazet <edumazet@google.com>
Pravin Shelar June 8, 2017, 9:47 p.m. UTC | #2
On Wed, Jun 7, 2017 at 9:32 PM, Haishuang Yan
<yanhaishuang@cmss.chinamobile.com> wrote:
> When ip_tunnel_rcv fails, the tun_dst won't be freed, so call
> dst_release to free it in error code path.
>
> CC: Pravin B Shelar <pshelar@nicira.com>
> Fixes: 2e15ea390e6f ("ip_gre: Add support to collect tunnel metadata.")
> Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
>
> ---
> Changes in v2:
>   - Add the the missing Fixes information
> Changes in v3:
>   - Free tun_dst from error code path
> ---

Acked-by: Pravin B Shelar <pshelar@ovn.org>
diff mbox

Patch

diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index b878ecb..0f1d876 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -446,6 +446,8 @@  int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
 	return 0;
 
 drop:
+	if (tun_dst)
+		dst_release((struct dst_entry *)tun_dst);
 	kfree_skb(skb);
 	return 0;
 }