[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20210712060735.999201661@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:10:35 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Pavel Skripkin <paskripkin@...il.com>,
Cong Wang <cong.wang@...edance.com>,
"David S. Miller" <davem@...emloft.net>,
Sasha Levin <sashal@...nel.org>,
syzbot+1071ad60cd7df39fdadb@...kaller.appspotmail.com
Subject: [PATCH 5.4 251/348] net: sched: fix warning in tcindex_alloc_perfect_hash
From: Pavel Skripkin <paskripkin@...il.com>
[ Upstream commit 3f2db250099f46988088800052cdf2332c7aba61 ]
Syzbot reported warning in tcindex_alloc_perfect_hash. The problem
was in too big cp->hash, which triggers warning in kmalloc. Since
cp->hash comes from userspace, there is no need to warn if value
is not correct
Fixes: b9a24bb76bf6 ("net_sched: properly handle failure case of tcf_exts_init()")
Reported-and-tested-by: syzbot+1071ad60cd7df39fdadb@...kaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@...il.com>
Acked-by: Cong Wang <cong.wang@...edance.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
net/sched/cls_tcindex.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sched/cls_tcindex.c b/net/sched/cls_tcindex.c
index c9399e81c505..3e81f87d0c89 100644
--- a/net/sched/cls_tcindex.c
+++ b/net/sched/cls_tcindex.c
@@ -304,7 +304,7 @@ static int tcindex_alloc_perfect_hash(struct net *net, struct tcindex_data *cp)
int i, err = 0;
cp->perfect = kcalloc(cp->hash, sizeof(struct tcindex_filter_result),
- GFP_KERNEL);
+ GFP_KERNEL | __GFP_NOWARN);
if (!cp->perfect)
return -ENOMEM;
--
2.30.2
Powered by blists - more mailing lists