From: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxxxxxx>
bitmap:ip and bitmap:ip,mac type did not reject such a crazy range
when created and using such a set results in a kernel crash.
The hash types just silently ignored such parameters.
Reject invalid /0 input parameters explicitely.
Signed-off-by: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxxxxxx>
---
net/netfilter/ipset/ip_set_bitmap_ip.c | 10 ++++++----
net/netfilter/ipset/ip_set_bitmap_ipmac.c | 5 +++--
net/netfilter/ipset/ip_set_hash_ip.c | 2 +-
net/netfilter/ipset/ip_set_hash_ipport.c | 2 +-
net/netfilter/ipset/ip_set_hash_ipportip.c | 2 +-
net/netfilter/ipset/ip_set_hash_ipportnet.c | 2 +-
6 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/net/netfilter/ipset/ip_set_bitmap_ip.c b/net/netfilter/ipset/ip_set_bitmap_ip.c
index 7e1b061..02184b5 100644
--- a/net/netfilter/ipset/ip_set_bitmap_ip.c
+++ b/net/netfilter/ipset/ip_set_bitmap_ip.c
@@ -284,7 +284,7 @@ bitmap_ip_uadt(struct ip_set *set, struct nlattr *tb[],
} else if (tb[IPSET_ATTR_CIDR]) {
u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
- if (cidr > 32)
+ if (!cidr || cidr > 32)
return -IPSET_ERR_INVALID_CIDR;
ip_set_mask_from_to(ip, ip_to, cidr);
} else
@@ -454,7 +454,8 @@ static int
bitmap_ip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
{
struct bitmap_ip *map;
- u32 first_ip, last_ip, hosts, elements;
+ u32 first_ip, last_ip, hosts;
+ u64 elements;
u8 netmask = 32;
int ret;
@@ -497,7 +498,7 @@ bitmap_ip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
if (netmask == 32) {
hosts = 1;
- elements = last_ip - first_ip + 1;
+ elements = (u64)last_ip - first_ip + 1;
} else {
u8 mask_bits;
u32 mask;
@@ -515,7 +516,8 @@ bitmap_ip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
if (elements > IPSET_BITMAP_MAX_RANGE + 1)
return -IPSET_ERR_BITMAP_RANGE_SIZE;
- pr_debug("hosts %u, elements %u\n", hosts, elements);
+ pr_debug("hosts %u, elements %llu\n",
+ hosts, (unsigned long long)elements);
map = kzalloc(sizeof(*map), GFP_KERNEL);
if (!map)
diff --git a/net/netfilter/ipset/ip_set_bitmap_ipmac.c b/net/netfilter/ipset/ip_set_bitmap_ipmac.c
index d7eaf10..6819d3c 100644
--- a/net/netfilter/ipset/ip_set_bitmap_ipmac.c
+++ b/net/netfilter/ipset/ip_set_bitmap_ipmac.c
@@ -557,7 +557,8 @@ static int
bitmap_ipmac_create(struct ip_set *set, struct nlattr *tb[],
u32 flags)
{
- u32 first_ip, last_ip, elements;
+ u32 first_ip, last_ip;
+ u64 elements;
struct bitmap_ipmac *map;
int ret;
@@ -588,7 +589,7 @@ bitmap_ipmac_create(struct ip_set *set, struct nlattr *tb[],
} else
return -IPSET_ERR_PROTOCOL;
- elements = last_ip - first_ip + 1;
+ elements = (u64)last_ip - first_ip + 1;
if (elements > IPSET_BITMAP_MAX_RANGE + 1)
return -IPSET_ERR_BITMAP_RANGE_SIZE;
diff --git a/net/netfilter/ipset/ip_set_hash_ip.c b/net/netfilter/ipset/ip_set_hash_ip.c
index 42bccd5..bc8f76e 100644
--- a/net/netfilter/ipset/ip_set_hash_ip.c
+++ b/net/netfilter/ipset/ip_set_hash_ip.c
@@ -179,7 +179,7 @@ hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[],
} else if (tb[IPSET_ATTR_CIDR]) {
u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
- if (cidr > 32)
+ if (!cidr || cidr > 32)
return -IPSET_ERR_INVALID_CIDR;
ip_set_mask_from_to(ip, ip_to, cidr);
} else
diff --git a/net/netfilter/ipset/ip_set_hash_ipport.c b/net/netfilter/ipset/ip_set_hash_ipport.c
index e0ce0dae..6760fd4 100644
--- a/net/netfilter/ipset/ip_set_hash_ipport.c
+++ b/net/netfilter/ipset/ip_set_hash_ipport.c
@@ -217,7 +217,7 @@ hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
} else if (tb[IPSET_ATTR_CIDR]) {
u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
- if (cidr > 32)
+ if (!cidr || cidr > 32)
return -IPSET_ERR_INVALID_CIDR;
ip_set_mask_from_to(ip, ip_to, cidr);
} else
diff --git a/net/netfilter/ipset/ip_set_hash_ipportip.c b/net/netfilter/ipset/ip_set_hash_ipportip.c
index c864bf4..ac09bec 100644
--- a/net/netfilter/ipset/ip_set_hash_ipportip.c
+++ b/net/netfilter/ipset/ip_set_hash_ipportip.c
@@ -225,7 +225,7 @@ hash_ipportip4_uadt(struct ip_set *set, struct nlattr *tb[],
} else if (tb[IPSET_ATTR_CIDR]) {
u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
- if (cidr > 32)
+ if (!cidr || cidr > 32)
return -IPSET_ERR_INVALID_CIDR;
ip_set_mask_from_to(ip, ip_to, cidr);
} else
diff --git a/net/netfilter/ipset/ip_set_hash_ipportnet.c b/net/netfilter/ipset/ip_set_hash_ipportnet.c
index 2c704bb..242814e 100644
--- a/net/netfilter/ipset/ip_set_hash_ipportnet.c
+++ b/net/netfilter/ipset/ip_set_hash_ipportnet.c
@@ -290,7 +290,7 @@ hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
} else if (tb[IPSET_ATTR_CIDR]) {
u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
- if (cidr > 32)
+ if (!cidr || cidr > 32)
return -IPSET_ERR_INVALID_CIDR;
ip_set_mask_from_to(ip, ip_to, cidr);
}
--
1.7.10.4
--
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
