From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Pablo Neira Ayuso <pablo@netfilter.org>,
syzbot+cd43695a64bcd21b8596@syzkaller.appspotmail.com,
Sasha Levin <sashal@kernel.org>,
kadlec@netfilter.org, fw@strlen.de, davem@davemloft.net,
kuba@kernel.org, netfilter-devel@vger.kernel.org,
coreteam@netfilter.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.14 17/40] netfilter: nf_tables: Fix oversized kvmalloc() calls
Date: Tue, 5 Oct 2021 09:49:56 -0400 [thread overview]
Message-ID: <20211005135020.214291-17-sashal@kernel.org> (raw)
In-Reply-To: <20211005135020.214291-1-sashal@kernel.org>
From: Pablo Neira Ayuso <pablo@netfilter.org>
[ Upstream commit 45928afe94a094bcda9af858b96673d59bc4a0e9 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.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 081437dd75b7..4b6255c4b183 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)
--
2.33.0
next prev parent reply other threads:[~2021-10-05 13:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20211005135020.214291-1-sashal@kernel.org>
2021-10-05 13:49 ` [PATCH AUTOSEL 5.14 09/40] netfilter: ipset: Fix oversized kvmalloc() calls Sasha Levin
2021-10-05 13:49 ` [PATCH AUTOSEL 5.14 12/40] netfilter: ip6_tables: zero-initialize fragment offset Sasha Levin
2021-10-05 13:49 ` Sasha Levin [this message]
2021-10-05 13:49 ` [PATCH AUTOSEL 5.14 18/40] netfilter: nf_nat_masquerade: make async masq_inet6_event handling generic Sasha Levin
2021-10-05 13:49 ` [PATCH AUTOSEL 5.14 19/40] netfilter: nf_nat_masquerade: defer conntrack walk to work queue Sasha Levin
2021-10-05 13:49 ` [PATCH AUTOSEL 5.14 20/40] netfilter: conntrack: serialize hash resizes and cleanups Sasha Levin
2021-10-05 13:50 ` [PATCH AUTOSEL 5.14 21/40] mac80211: Drop frames from invalid MAC address in ad-hoc mode Sasha Levin
2021-10-05 13:50 ` [PATCH AUTOSEL 5.14 25/40] net: prevent user from passing illegal stab size Sasha Levin
2021-10-05 13:50 ` [PATCH AUTOSEL 5.14 26/40] mac80211: check return value of rhashtable_init Sasha Levin
2021-10-05 13:50 ` [PATCH AUTOSEL 5.14 27/40] net: bgmac-platform: handle mac-address deferral Sasha Levin
2021-10-05 13:50 ` [PATCH AUTOSEL 5.14 28/40] net: mdiobus: Fix memory leak in __mdiobus_register Sasha Levin
2021-10-05 14:02 ` Andrew Lunn
2021-10-06 15:12 ` Sasha Levin
2021-10-05 13:50 ` [PATCH AUTOSEL 5.14 31/40] net: sun: SUNVNET_COMMON should depend on INET Sasha Levin
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