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Date: Tue, 9 Dec 2014 09:52:15 +0900 From: Simon Horman <horms@...ge.net.au> To: Julian Anastasov <ja@....bg> Cc: Dan Carpenter <dan.carpenter@...cle.com>, Wensong Zhang <wensong@...ux-vs.org>, Pablo Neira Ayuso <pablo@...filter.org>, Patrick McHardy <kaber@...sh.net>, Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>, "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org, lvs-devel@...r.kernel.org, netfilter-devel@...r.kernel.org, coreteam@...filter.org, kernel-janitors@...r.kernel.org Subject: Re: [patch v2] ipvs: uninitialized data with IP_VS_IPV6 On Sun, Dec 07, 2014 at 08:39:35PM +0200, Julian Anastasov wrote: > > Hello, > > On Sat, 6 Dec 2014, Dan Carpenter wrote: > > > The app_tcp_pkt_out() function expects "*diff" to be set and ends up > > using uninitialized data if CONFIG_IP_VS_IPV6 is turned on. > > > > The same issue is there in app_tcp_pkt_in(). Thanks to Julian Anastasov > > for noticing that. > > > > Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com> > > --- > > v2: fix app_tcp_pkt_in() as well. This is an old bug. > > Thanks! It will not break seqs for IPv6 control > connection, only that we do not support FTP yet :( I have > the doubt whether this should be classified as bugfix :) > I guess, it is a net-next material, right? Agreed, I have queued it up in ipvs-next. I'll send a pull request to Pablo if Dan doesn't object to it going there. > Simon, please apply. > > Acked-by: Julian Anastasov <ja@....bg> > > > diff --git a/net/netfilter/ipvs/ip_vs_ftp.c b/net/netfilter/ipvs/ip_vs_ftp.c > > index 1d5341f..5d3daae 100644 > > --- a/net/netfilter/ipvs/ip_vs_ftp.c > > +++ b/net/netfilter/ipvs/ip_vs_ftp.c > > @@ -183,6 +183,8 @@ static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp, > > struct nf_conn *ct; > > struct net *net; > > > > + *diff = 0; > > + > > #ifdef CONFIG_IP_VS_IPV6 > > /* This application helper doesn't work with IPv6 yet, > > * so turn this into a no-op for IPv6 packets > > @@ -191,8 +193,6 @@ static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp, > > return 1; > > #endif > > > > - *diff = 0; > > - > > /* Only useful for established sessions */ > > if (cp->state != IP_VS_TCP_S_ESTABLISHED) > > return 1; > > @@ -322,6 +322,9 @@ static int ip_vs_ftp_in(struct ip_vs_app *app, struct ip_vs_conn *cp, > > struct ip_vs_conn *n_cp; > > struct net *net; > > > > + /* no diff required for incoming packets */ > > + *diff = 0; > > + > > #ifdef CONFIG_IP_VS_IPV6 > > /* This application helper doesn't work with IPv6 yet, > > * so turn this into a no-op for IPv6 packets > > @@ -330,9 +333,6 @@ static int ip_vs_ftp_in(struct ip_vs_app *app, struct ip_vs_conn *cp, > > return 1; > > #endif > > > > - /* no diff required for incoming packets */ > > - *diff = 0; > > - > > /* Only useful for established sessions */ > > if (cp->state != IP_VS_TCP_S_ESTABLISHED) > > return 1; > > Regards > > -- > Julian Anastasov <ja@....bg> > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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