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authorFlorian Westphal <fw@strlen.de>2012-06-17 09:56:46 +0000
committerPablo Neira Ayuso <pablo@netfilter.org>2012-06-25 12:03:21 +0200
commitef5b6e127761667f78d99b7510a3876077fe9abe (patch)
treef47a8122ac8fbb8bf7d76b2a4720a811e25dd3e2 /net
parent8b8e4bc0391f8abbcdb9e1c54415bcc0f4f5a2a0 (diff)
downloadlinux-ef5b6e127761667f78d99b7510a3876077fe9abe.tar.bz2
netfilter: ipset: fix interface comparision in hash-netiface sets
ifname_compare() assumes that skb->dev is zero-padded, e.g 'eth1\0\0\0\0\0...'. This isn't always the case. e1000 driver does strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); in e1000_probe(), so once device is registered dev->name memory contains 'eth1\0:0:3\0\0\0' (or something like that), which makes eth1 compare fail. Use plain strcmp() instead. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/ipset/ip_set_hash_netiface.c32
1 files changed, 4 insertions, 28 deletions
diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c
index ee863943c826..d5d3607ae7bc 100644
--- a/net/netfilter/ipset/ip_set_hash_netiface.c
+++ b/net/netfilter/ipset/ip_set_hash_netiface.c
@@ -38,30 +38,6 @@ struct iface_node {
#define iface_data(n) (rb_entry(n, struct iface_node, node)->iface)
-static inline long
-ifname_compare(const char *_a, const char *_b)
-{
- const long *a = (const long *)_a;
- const long *b = (const long *)_b;
-
- BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
- if (a[0] != b[0])
- return a[0] - b[0];
- if (IFNAMSIZ > sizeof(long)) {
- if (a[1] != b[1])
- return a[1] - b[1];
- }
- if (IFNAMSIZ > 2 * sizeof(long)) {
- if (a[2] != b[2])
- return a[2] - b[2];
- }
- if (IFNAMSIZ > 3 * sizeof(long)) {
- if (a[3] != b[3])
- return a[3] - b[3];
- }
- return 0;
-}
-
static void
rbtree_destroy(struct rb_root *root)
{
@@ -99,7 +75,7 @@ iface_test(struct rb_root *root, const char **iface)
while (n) {
const char *d = iface_data(n);
- long res = ifname_compare(*iface, d);
+ int res = strcmp(*iface, d);
if (res < 0)
n = n->rb_left;
@@ -121,7 +97,7 @@ iface_add(struct rb_root *root, const char **iface)
while (*n) {
char *ifname = iface_data(*n);
- long res = ifname_compare(*iface, ifname);
+ int res = strcmp(*iface, ifname);
p = *n;
if (res < 0)
@@ -366,7 +342,7 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
struct hash_netiface4_elem data = { .cidr = HOST_MASK };
u32 ip = 0, ip_to, last;
u32 timeout = h->timeout;
- char iface[IFNAMSIZ] = {};
+ char iface[IFNAMSIZ];
int ret;
if (unlikely(!tb[IPSET_ATTR_IP] ||
@@ -663,7 +639,7 @@ hash_netiface6_uadt(struct ip_set *set, struct nlattr *tb[],
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netiface6_elem data = { .cidr = HOST_MASK };
u32 timeout = h->timeout;
- char iface[IFNAMSIZ] = {};
+ char iface[IFNAMSIZ];
int ret;
if (unlikely(!tb[IPSET_ATTR_IP] ||