Re: [patch] ipvs: freeing uninitialized pointer on error

[Julian Anastasov <ja@xxxxxx>]

        Hello,

On Fri, 25 Jan 2013, Dan Carpenter wrote:

> If state != IP_VS_STATE_BACKUP then tinfo->buf is uninitialized.  If
> kthread_run() fails then it means we free random memory resulting in an
> oops.

        Good catch. Simon, please apply!

        Problem is in 3.5+ caused by commit f73181c828
(ipvs: add support for sync threads)

> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

Acked-by: Julian Anastasov <ja@xxxxxx>

> diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
> index effa10c..44fd10c 100644
> --- a/net/netfilter/ipvs/ip_vs_sync.c
> +++ b/net/netfilter/ipvs/ip_vs_sync.c
> @@ -1795,6 +1795,8 @@ int start_sync_thread(struct net *net, int state, char 
> *mcast_ifn, __u8 syncid)
>                                            GFP_KERNEL);
>                       if (!tinfo->buf)
>                               goto outtinfo;
> +             } else {
> +                     tinfo->buf = NULL;
>               }
>               tinfo->id = id;

Regards

--
Julian Anastasov <ja@xxxxxx>
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