From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org, kuba@kernel.org
Subject: [PATCH net 10/15] netfilter: nf_tables: Fix oversized kvmalloc() calls
Date: Sat, 25 Sep 2021 00:11:08 +0200 [thread overview]
Message-ID: <20210924221113.348767-11-pablo@netfilter.org> (raw)
In-Reply-To: <20210924221113.348767-1-pablo@netfilter.org>
The commit 7661809d493b ("mm: don't allow oversized kvmalloc() calls")
limits the max allocatable memory via kvmalloc() to MAX_INT.
Reported-by: syzbot+cd43695a64bcd21b8596@syzkaller.appspotmail.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 33e771cd847c..b9546defdc28 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -4336,7 +4336,7 @@ static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
if (ops->privsize != NULL)
size = ops->privsize(nla, &desc);
alloc_size = sizeof(*set) + size + udlen;
- if (alloc_size < size)
+ if (alloc_size < size || alloc_size > INT_MAX)
return -ENOMEM;
set = kvzalloc(alloc_size, GFP_KERNEL);
if (!set)
--
2.30.2
next prev parent reply other threads:[~2021-09-24 22:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-24 22:10 [PATCH net 00/15] Netfilter/IPVS fixes for net Pablo Neira Ayuso
2021-09-24 22:10 ` [PATCH net 01/15] netfilter: ipset: Fix oversized kvmalloc() calls Pablo Neira Ayuso
2021-09-25 3:40 ` patchwork-bot+netdevbpf
2021-09-24 22:11 ` [PATCH net 02/15] ipvs: check that ip_vs_conn_tab_bits is between 8 and 20 Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 03/15] netfilter: ip6_tables: zero-initialize fragment offset Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 04/15] netfilter: conntrack: make max chain length random Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 05/15] netfilter: conntrack: include zone id in tuple hash again Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 06/15] netfilter: nat: include zone id in nat table " Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 07/15] selftests: netfilter: add selftest for directional zone support Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 08/15] selftests: netfilter: add zone stress test with colliding tuples Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 09/15] netfilter: nf_tables: unlink table before deleting it Pablo Neira Ayuso
2021-09-24 22:11 ` Pablo Neira Ayuso [this message]
2021-09-24 22:11 ` [PATCH net 11/15] netfilter: nf_nat_masquerade: make async masq_inet6_event handling generic Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 12/15] netfilter: nf_nat_masquerade: defer conntrack walk to work queue Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 13/15] netfilter: iptable_raw: drop bogus net_init annotation Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 14/15] netfilter: log: work around missing softdep backend module Pablo Neira Ayuso
2021-09-24 22:11 ` [PATCH net 15/15] netfilter: conntrack: serialize hash resizes and cleanups Pablo Neira Ayuso
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