netfilter: nf_nat_snmp: Fix panic when snmp_trap_helper fails to register

[pandora-kernel.git] / net / ipv4 / netfilter / nf_nat_snmp_basic.c

diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index d1cb412..5e40775 100644 (file)
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -400,11 +400,8 @@ static unsigned char asn1_octets_decode(struct asn1_ctx *ctx,
        *len = 0;
 
        *octets = kmalloc(eoc - ctx->pointer, GFP_ATOMIC);
-       if (*octets == NULL) {
-               if (net_ratelimit())
-                       pr_notice("OOM in bsalg (%d)\n", __LINE__);
+       if (*octets == NULL)
                return 0;
-       }
 
        ptr = *octets;
        while (ctx->pointer < eoc) {
@@ -451,11 +448,8 @@ static unsigned char asn1_oid_decode(struct asn1_ctx *ctx,
                return 0;
 
        *oid = kmalloc(size * sizeof(unsigned long), GFP_ATOMIC);
-       if (*oid == NULL) {
-               if (net_ratelimit())
-                       pr_notice("OOM in bsalg (%d)\n", __LINE__);
+       if (*oid == NULL)
                return 0;
-       }
 
        optr = *oid;
 
@@ -728,8 +722,6 @@ static unsigned char snmp_object_decode(struct asn1_ctx *ctx,
                *obj = kmalloc(sizeof(struct snmp_object) + len, GFP_ATOMIC);
                if (*obj == NULL) {
                        kfree(id);
-                       if (net_ratelimit())
-                               pr_notice("OOM in bsalg (%d)\n", __LINE__);
                        return 0;
                }
                (*obj)->syntax.l[0] = l;
@@ -744,8 +736,6 @@ static unsigned char snmp_object_decode(struct asn1_ctx *ctx,
                if (*obj == NULL) {
                        kfree(p);
                        kfree(id);
-                       if (net_ratelimit())
-                               pr_notice("OOM in bsalg (%d)\n", __LINE__);
                        return 0;
                }
                memcpy((*obj)->syntax.c, p, len);
@@ -759,8 +749,6 @@ static unsigned char snmp_object_decode(struct asn1_ctx *ctx,
                *obj = kmalloc(sizeof(struct snmp_object), GFP_ATOMIC);
                if (*obj == NULL) {
                        kfree(id);
-                       if (net_ratelimit())
-                               pr_notice("OOM in bsalg (%d)\n", __LINE__);
                        return 0;
                }
                if (!asn1_null_decode(ctx, end)) {
@@ -780,8 +768,6 @@ static unsigned char snmp_object_decode(struct asn1_ctx *ctx,
                if (*obj == NULL) {
                        kfree(lp);
                        kfree(id);
-                       if (net_ratelimit())
-                               pr_notice("OOM in bsalg (%d)\n", __LINE__);
                        return 0;
                }
                memcpy((*obj)->syntax.ul, lp, len);
@@ -801,8 +787,6 @@ static unsigned char snmp_object_decode(struct asn1_ctx *ctx,
                if (*obj == NULL) {
                        kfree(p);
                        kfree(id);
-                       if (net_ratelimit())
-                               pr_notice("OOM in bsalg (%d)\n", __LINE__);
                        return 0;
                }
                memcpy((*obj)->syntax.uc, p, len);
@@ -819,8 +803,6 @@ static unsigned char snmp_object_decode(struct asn1_ctx *ctx,
                *obj = kmalloc(sizeof(struct snmp_object) + len, GFP_ATOMIC);
                if (*obj == NULL) {
                        kfree(id);
-                       if (net_ratelimit())
-                               pr_notice("OOM in bsalg (%d)\n", __LINE__);
                        return 0;
                }
                (*obj)->syntax.ul[0] = ul;
@@ -1279,16 +1261,6 @@ static const struct nf_conntrack_expect_policy snmp_exp_policy = {
        .timeout        = 180,
 };
 
-static struct nf_conntrack_helper snmp_helper __read_mostly = {
-       .me                     = THIS_MODULE,
-       .help                   = help,
-       .expect_policy          = &snmp_exp_policy,
-       .name                   = "snmp",
-       .tuple.src.l3num        = AF_INET,
-       .tuple.src.u.udp.port   = cpu_to_be16(SNMP_PORT),
-       .tuple.dst.protonum     = IPPROTO_UDP,
-};
-
 static struct nf_conntrack_helper snmp_trap_helper __read_mostly = {
        .me                     = THIS_MODULE,
        .help                   = help,
@@ -1307,17 +1279,10 @@ static struct nf_conntrack_helper snmp_trap_helper __read_mostly = {
 
 static int __init nf_nat_snmp_basic_init(void)
 {
-       int ret = 0;
-
        BUG_ON(nf_nat_snmp_hook != NULL);
        RCU_INIT_POINTER(nf_nat_snmp_hook, help);
 
-       ret = nf_conntrack_helper_register(&snmp_trap_helper);
-       if (ret < 0) {
-               nf_conntrack_helper_unregister(&snmp_helper);
-               return ret;
-       }
-       return ret;
+       return nf_conntrack_helper_register(&snmp_trap_helper);
 }
 
 static void __exit nf_nat_snmp_basic_fini(void)