Netfilter: Fix logging regression

[NETFILTER]: Fix logging regression

Loading one of the LOG target fails if a different target has already
registered itself as backend for the same family. This can affect the
ipt_LOG and ipt_ULOG modules when both are loaded.

Reported and tested by: <t.artem@mailcity.com>
Upstream-commit: 7e2acc7e

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/bridge/netfilter/ebt_log.c b/net/bridge/netfilter/ebt_log.c
index 031bfa4a51fc0c8a25d7d7f92810183f577cbaea..984e9c64fb80304ec47a55b9f957159a3f60cece 100644 (file)
--- a/net/bridge/netfilter/ebt_log.c
+++ b/net/bridge/netfilter/ebt_log.c
@@ -196,10 +196,8 @@ static int __init ebt_log_init(void)
        ret = ebt_register_watcher(&log);
        if (ret < 0)
                return ret;
-       ret = nf_log_register(PF_BRIDGE, &ebt_log_logger);
-       if (ret < 0 && ret != -EEXIST)
-               ebt_unregister_watcher(&log);
-       return ret;
+       nf_log_register(PF_BRIDGE, &ebt_log_logger);
+       return 0;
 }
 
 static void __exit ebt_log_fini(void)

diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
index 9411db62591754b5592a783040e48763ddc92514..6fec35225699347f92b5c6f16a62cc5e214672b4 100644 (file)
--- a/net/bridge/netfilter/ebt_ulog.c
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -308,12 +308,8 @@ static int __init ebt_ulog_init(void)
        else if ((ret = ebt_register_watcher(&ulog)))
                sock_release(ebtulognl->sk_socket);
 
-       if (nf_log_register(PF_BRIDGE, &ebt_ulog_logger) < 0) {
-               printk(KERN_WARNING "ebt_ulog: not logging via ulog "
-                      "since somebody else already registered for PF_BRIDGE\n");
-               /* we cannot make module load fail here, since otherwise
-                * ebtables userspace would abort */
-       }
+       if (ret == 0)
+               nf_log_register(PF_BRIDGE, &ebt_ulog_logger);
 
        return ret;
 }

diff --git a/net/ipv4/netfilter/ipt_LOG.c b/net/ipv4/netfilter/ipt_LOG.c
index a42c5cd968b10a19dad14c05a79cc768969e26f6..361be2bc7eea610817b4f8dcd0288aa97fb521c7 100644 (file)
--- a/net/ipv4/netfilter/ipt_LOG.c
+++ b/net/ipv4/netfilter/ipt_LOG.c
@@ -477,10 +477,8 @@ static int __init ipt_log_init(void)
        ret = xt_register_target(&ipt_log_reg);
        if (ret < 0)
                return ret;
-       ret = nf_log_register(PF_INET, &ipt_log_logger);
-       if (ret < 0 && ret != -EEXIST)
-               xt_unregister_target(&ipt_log_reg);
-       return ret;
+       nf_log_register(PF_INET, &ipt_log_logger);
+       return 0;
 }
 
 static void __exit ipt_log_fini(void)

diff --git a/net/ipv6/netfilter/ip6t_LOG.c b/net/ipv6/netfilter/ip6t_LOG.c
index 5bb9cd3493504b9459004ac4336fefa0c9650173..a7a25177dc0ade17337484003b1a7085e424747f 100644 (file)
--- a/net/ipv6/netfilter/ip6t_LOG.c
+++ b/net/ipv6/netfilter/ip6t_LOG.c
@@ -490,10 +490,8 @@ static int __init ip6t_log_init(void)
        ret = xt_register_target(&ip6t_log_reg);
        if (ret < 0)
                return ret;
-       ret = nf_log_register(PF_INET6, &ip6t_logger);
-       if (ret < 0 && ret != -EEXIST)
-               xt_unregister_target(&ip6t_log_reg);
-       return ret;
+       nf_log_register(PF_INET6, &ip6t_logger);
+       return 0;
 }
 
 static void __exit ip6t_log_fini(void)