From: mengkanglai <mengkanglai2@huawei.com>
To: "David S. Miller" <davem@davemloft.net>,
David Ahern <dsahern@kernel.org>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: "Fengtao (fengtao, Euler)" <fengtao40@huawei.com>,
"Yanan (Euler)" <yanan@huawei.com>
Subject: [Consult]kernel tcp socket lack of refcnt for net may cause uaf problem?
Date: Tue, 19 Dec 2023 13:44:36 +0000 [thread overview]
Message-ID: <26f7811f5ee247c389ddd38034d8747d@huawei.com> (raw)
Hello, Eric:
I found upstream have fixed a UAF issue (smc: Fix use-after-free in tcp_write_timer_handler()):
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9744d2bf19762703704ecba885b7ac282c02eacf
When create a kernel socket use sock_create_kern , it won't call get_net() to increase refcnt for net where the socket is located.
I found some other subsystem(like rds and sunrpc) also use sock_create_kern to create kernel tcp socket, I want to know if they have same UAF problem?
Best wishes!
next reply other threads:[~2023-12-19 13:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-19 13:44 mengkanglai [this message]
2023-12-19 15:09 ` Kuniyuki Iwashima
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