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Commit 7bcbf81a authored by Julian Anastasov's avatar Julian Anastasov Committed by David S. Miller
Browse files

ipvs: avoid oops for passive FTP 



Fix Passive FTP problem in ip_vs_ftp:

- Do not oops in nf_nat_set_seq_adjust (adjust_tcp_sequence) when
  iptable_nat module is not loaded

Signed-off-by: default avatarJulian Anastasov <ja@ssi.bg>
Signed-off-by: default avatarSimon Horman <horms@verge.net.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5e4e7573

net/netfilter/ipvs/ip_vs_ftp.c

+2 −1
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ 
#include <linux/netfilter.h>

#include <net/netfilter/nf_conntrack.h>

#include <net/netfilter/nf_conntrack_expect.h>

#include <net/netfilter/nf_nat.h>

#include <net/netfilter/nf_nat_helper.h>

#include <linux/gfp.h>

#include <net/protocol.h>
@@ -359,7 +360,7 @@ static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp, 
		buf_len = strlen(buf);



		ct = nf_ct_get(skb, &ctinfo);

		if (ct && !nf_ct_is_untracked(ct)) {

		if (ct && !nf_ct_is_untracked(ct) && nfct_nat(ct)) {

			/* If mangling fails this function will return 0

			 * which will cause the packet to be dropped.

			 * Mangling can only fail under memory pressure,