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@xxxxxxxxxx> > --- > 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? Simon, please apply. Acked-by: Julian Anastasov <ja@xxxxxx> > 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@xxxxxx> -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
