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netfilter: nf_tables: limit allowed range via nla_policy

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These NLA_U32 types get stored in u8 fields, reject invalid values
instead of silently casting to u8.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2023-06-21 21:11:03 +02:00 committed by Pablo Neira Ayuso
parent 079cd63321
commit a412dbf40f
15 changed files with 21 additions and 21 deletions
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2
net/netfilter/nft_bitwise.c
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@ -86,7 +86,7 @@ static const struct nla_policy nft_bitwise_policy[NFTA_BITWISE_MAX + 1] = {
[NFTA_BITWISE_LEN] = { .type = NLA_U32 },
[NFTA_BITWISE_MASK] = { .type = NLA_NESTED },
[NFTA_BITWISE_XOR] = { .type = NLA_NESTED },
[NFTA_BITWISE_OP] = { .type = NLA_U32 },
[NFTA_BITWISE_OP] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_BITWISE_DATA] = { .type = NLA_NESTED },
};

6
net/netfilter/nft_byteorder.c
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@ -88,9 +88,9 @@ void nft_byteorder_eval(const struct nft_expr *expr,
static const struct nla_policy nft_byteorder_policy[NFTA_BYTEORDER_MAX + 1] = {
[NFTA_BYTEORDER_SREG] = { .type = NLA_U32 },
[NFTA_BYTEORDER_DREG] = { .type = NLA_U32 },
[NFTA_BYTEORDER_OP] = { .type = NLA_U32 },
[NFTA_BYTEORDER_LEN] = { .type = NLA_U32 },
[NFTA_BYTEORDER_SIZE] = { .type = NLA_U32 },
[NFTA_BYTEORDER_OP] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_BYTEORDER_LEN] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_BYTEORDER_SIZE] = NLA_POLICY_MAX(NLA_BE32, 255),
};
static int nft_byteorder_init(const struct nft_ctx *ctx,

2
net/netfilter/nft_ct.c
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@ -332,7 +332,7 @@ static void nft_ct_set_eval(const struct nft_expr *expr,
static const struct nla_policy nft_ct_policy[NFTA_CT_MAX + 1] = {
[NFTA_CT_DREG] = { .type = NLA_U32 },
[NFTA_CT_KEY] = { .type = NLA_U32 },
[NFTA_CT_KEY] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_CT_DIRECTION] = { .type = NLA_U8 },
[NFTA_CT_SREG] = { .type = NLA_U32 },
};

2
net/netfilter/nft_dynset.c
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@ -148,7 +148,7 @@ static const struct nla_policy nft_dynset_policy[NFTA_DYNSET_MAX + 1] = {
[NFTA_DYNSET_SET_NAME] = { .type = NLA_STRING,
.len = NFT_SET_MAXNAMELEN - 1 },
[NFTA_DYNSET_SET_ID] = { .type = NLA_U32 },
[NFTA_DYNSET_OP] = { .type = NLA_U32 },
[NFTA_DYNSET_OP] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_DYNSET_SREG_KEY] = { .type = NLA_U32 },
[NFTA_DYNSET_SREG_DATA] = { .type = NLA_U32 },
[NFTA_DYNSET_TIMEOUT] = { .type = NLA_U64 },

4
net/netfilter/nft_exthdr.c
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@ -487,9 +487,9 @@ static const struct nla_policy nft_exthdr_policy[NFTA_EXTHDR_MAX + 1] = {
[NFTA_EXTHDR_DREG] = { .type = NLA_U32 },
[NFTA_EXTHDR_TYPE] = { .type = NLA_U8 },
[NFTA_EXTHDR_OFFSET] = { .type = NLA_U32 },
[NFTA_EXTHDR_LEN] = { .type = NLA_U32 },
[NFTA_EXTHDR_LEN] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_EXTHDR_FLAGS] = { .type = NLA_U32 },
[NFTA_EXTHDR_OP] = { .type = NLA_U32 },
[NFTA_EXTHDR_OP] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_EXTHDR_SREG] = { .type = NLA_U32 },
};

2
net/netfilter/nft_fwd_netdev.c
View File

@ -40,7 +40,7 @@ static void nft_fwd_netdev_eval(const struct nft_expr *expr,
static const struct nla_policy nft_fwd_netdev_policy[NFTA_FWD_MAX + 1] = {
[NFTA_FWD_SREG_DEV] = { .type = NLA_U32 },
[NFTA_FWD_SREG_ADDR] = { .type = NLA_U32 },
[NFTA_FWD_NFPROTO] = { .type = NLA_U32 },
[NFTA_FWD_NFPROTO] = NLA_POLICY_MAX(NLA_BE32, 255),
};
static int nft_fwd_netdev_init(const struct nft_ctx *ctx,

2
net/netfilter/nft_hash.c
View File

@ -59,7 +59,7 @@ static void nft_symhash_eval(const struct nft_expr *expr,
static const struct nla_policy nft_hash_policy[NFTA_HASH_MAX + 1] = {
[NFTA_HASH_SREG] = { .type = NLA_U32 },
[NFTA_HASH_DREG] = { .type = NLA_U32 },
[NFTA_HASH_LEN] = { .type = NLA_U32 },
[NFTA_HASH_LEN] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_HASH_MODULUS] = { .type = NLA_U32 },
[NFTA_HASH_SEED] = { .type = NLA_U32 },
[NFTA_HASH_OFFSET] = { .type = NLA_U32 },

2
net/netfilter/nft_meta.c
View File

@ -458,7 +458,7 @@ EXPORT_SYMBOL_GPL(nft_meta_set_eval);
const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = {
[NFTA_META_DREG] = { .type = NLA_U32 },
[NFTA_META_KEY] = { .type = NLA_U32 },
[NFTA_META_KEY] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_META_SREG] = { .type = NLA_U32 },
};
EXPORT_SYMBOL_GPL(nft_meta_policy);

2
net/netfilter/nft_range.c
View File

@ -42,7 +42,7 @@ void nft_range_eval(const struct nft_expr *expr,
static const struct nla_policy nft_range_policy[NFTA_RANGE_MAX + 1] = {
[NFTA_RANGE_SREG] = { .type = NLA_U32 },
[NFTA_RANGE_OP] = { .type = NLA_U32 },
[NFTA_RANGE_OP] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_RANGE_FROM_DATA] = { .type = NLA_NESTED },
[NFTA_RANGE_TO_DATA] = { .type = NLA_NESTED },
};

2
net/netfilter/nft_reject.c
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@ -18,7 +18,7 @@
#include <linux/icmpv6.h>
const struct nla_policy nft_reject_policy[NFTA_REJECT_MAX + 1] = {
[NFTA_REJECT_TYPE] = { .type = NLA_U32 },
[NFTA_REJECT_TYPE] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_REJECT_ICMP_CODE] = { .type = NLA_U8 },
};
EXPORT_SYMBOL_GPL(nft_reject_policy);

2
net/netfilter/nft_rt.c
View File

@ -104,7 +104,7 @@ err:
static const struct nla_policy nft_rt_policy[NFTA_RT_MAX + 1] = {
[NFTA_RT_DREG] = { .type = NLA_U32 },
[NFTA_RT_KEY] = { .type = NLA_U32 },
[NFTA_RT_KEY] = NLA_POLICY_MAX(NLA_BE32, 255),
};
static int nft_rt_get_init(const struct nft_ctx *ctx,

4
net/netfilter/nft_socket.c
View File

@ -138,9 +138,9 @@ static void nft_socket_eval(const struct nft_expr *expr,
}
static const struct nla_policy nft_socket_policy[NFTA_SOCKET_MAX + 1] = {
[NFTA_SOCKET_KEY] = { .type = NLA_U32 },
[NFTA_SOCKET_KEY] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_SOCKET_DREG] = { .type = NLA_U32 },
[NFTA_SOCKET_LEVEL] = { .type = NLA_U32 },
[NFTA_SOCKET_LEVEL] = NLA_POLICY_MAX(NLA_BE32, 255),
};
static int nft_socket_init(const struct nft_ctx *ctx,

2
net/netfilter/nft_tproxy.c
View File

@ -183,7 +183,7 @@ static void nft_tproxy_eval(const struct nft_expr *expr,
}
static const struct nla_policy nft_tproxy_policy[NFTA_TPROXY_MAX + 1] = {
[NFTA_TPROXY_FAMILY] = { .type = NLA_U32 },
[NFTA_TPROXY_FAMILY] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_TPROXY_REG_ADDR] = { .type = NLA_U32 },
[NFTA_TPROXY_REG_PORT] = { .type = NLA_U32 },
};

4
net/netfilter/nft_tunnel.c
View File

@ -66,9 +66,9 @@ static void nft_tunnel_get_eval(const struct nft_expr *expr,
}
static const struct nla_policy nft_tunnel_policy[NFTA_TUNNEL_MAX + 1] = {
[NFTA_TUNNEL_KEY] = { .type = NLA_U32 },
[NFTA_TUNNEL_KEY] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_TUNNEL_DREG] = { .type = NLA_U32 },
[NFTA_TUNNEL_MODE] = { .type = NLA_U32 },
[NFTA_TUNNEL_MODE] = NLA_POLICY_MAX(NLA_BE32, 255),
};
static int nft_tunnel_get_init(const struct nft_ctx *ctx,

4
net/netfilter/nft_xfrm.c
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@ -16,9 +16,9 @@
#include <net/xfrm.h>
static const struct nla_policy nft_xfrm_policy[NFTA_XFRM_MAX + 1] = {
[NFTA_XFRM_KEY] = { .type = NLA_U32 },
[NFTA_XFRM_KEY] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_XFRM_DIR] = { .type = NLA_U8 },
[NFTA_XFRM_SPNUM] = { .type = NLA_U32 },
[NFTA_XFRM_SPNUM] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_XFRM_DREG] = { .type = NLA_U32 },
};