From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 07/13] netfilter: nf_tables: underflow in nft_parse_u32_check()
Date: Fri, 21 Oct 2016 12:12:17 +0200 [thread overview]
Message-ID: <1477044743-18948-8-git-send-email-pablo@netfilter.org> (raw)
In-Reply-To: <1477044743-18948-1-git-send-email-pablo@netfilter.org>
From: Dan Carpenter <dan.carpenter@oracle.com>
We don't want to allow negatives here.
Fixes: 36b701fae12a ('netfilter: nf_tables: validate maximum value of u32 netlink attributes')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/nf_tables_api.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index b70d3ea1430e..24db22257586 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -4423,7 +4423,7 @@ static int nf_tables_check_loops(const struct nft_ctx *ctx,
*/
unsigned int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
{
- int val;
+ u32 val;
val = ntohl(nla_get_be32(attr));
if (val > max)
--
2.1.4
next prev parent reply other threads:[~2016-10-21 10:12 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-21 10:12 [PATCH 00/13] Netfilter fixes for net Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 01/13] netfilter: xt_hashlimit: Add missing ULL suffixes for 64-bit constants Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 02/13] netfilter: nft_dynset: fix element timeout for HZ != 1000 Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 03/13] netfilter: conntrack: remove obsolete sysctl (nf_conntrack_events_retry_timeout) Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 04/13] netfilter: xt_NFLOG: fix unexpected truncated packet Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 05/13] netfilter: xt_ipcomp: add "ip[6]t_ipcomp" module alias name Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 06/13] netfilter: nft_hash: add missing NFTA_HASH_OFFSET's nla_policy Pablo Neira Ayuso
2016-10-21 10:12 ` Pablo Neira Ayuso [this message]
2016-10-21 10:12 ` [PATCH 08/13] netfilter: nft_exthdr: fix error handling in nft_exthdr_init() Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 09/13] netfilter: nft_range: validate operation netlink attribute Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 10/13] netfilter: nf_tables: avoid uninitialized variable warning Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 11/13] netfilter: x_tables: suppress kmemcheck warning Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 12/13] netfilter: conntrack: restart gc immediately if GC_MAX_EVICTS is reached Pablo Neira Ayuso
2016-10-21 10:12 ` [PATCH 13/13] netfilter: fix nf_queue handling Pablo Neira Ayuso
2016-10-21 14:25 ` [PATCH 00/13] Netfilter fixes for net David Miller
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