From: Florian Westphal <fw@strlen•de>
To: Maxim Mikityanskiy <maximmi@nvidia•com>
Cc: "Mat Martineau" <mathew.j.martineau@linux•intel.com>,
"Matthieu Baerts" <matthieu.baerts@tessares•net>,
"Jakub Kicinski" <kuba@kernel•org>,
"David S. Miller" <davem@davemloft•net>,
"Pablo Neira Ayuso" <pablo@netfilter•org>,
"Jozsef Kadlecsik" <kadlec@netfilter•org>,
"Florian Westphal" <fw@strlen•de>,
"Toke Høiland-Jørgensen" <toke@toke•dk>,
"Jamal Hadi Salim" <jhs@mojatatu•com>,
"Cong Wang" <xiyou.wangcong@gmail•com>,
"Jiri Pirko" <jiri@resnulli•us>,
"Patrick McHardy" <kaber@trash•net>,
"Jesper Dangaard Brouer" <brouer@redhat•com>,
"Paolo Abeni" <pabeni@redhat•com>,
"Christoph Paasch" <cpaasch@apple•com>,
"Peter Krystad" <peter.krystad@linux•intel.com>,
"Young Xiao" <92siuyang@gmail•com>,
netdev@vger•kernel.org, mptcp@lists•linux.dev
Subject: Re: [PATCH net v2 1/3] netfilter: synproxy: Fix out of bounds when parsing TCP options
Date: Thu, 10 Jun 2021 18:43:52 +0200 [thread overview]
Message-ID: <20210610164352.GQ20020@breakpoint.cc> (raw)
In-Reply-To: <20210610164031.3412479-2-maximmi@nvidia.com>
Maxim Mikityanskiy <maximmi@nvidia•com> wrote:
> The TCP option parser in synproxy (synproxy_parse_options) could read
> one byte out of bounds. When the length is 1, the execution flow gets
> into the loop, reads one byte of the opcode, and if the opcode is
> neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds
> the length of 1.
>
> This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack
> out of bounds when parsing TCP options.").
Reviewed-by: Florian Westphal <fw@strlen•de>
next prev parent reply other threads:[~2021-06-10 16:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 16:40 [PATCH net v2 0/3] Fix out of bounds when parsing TCP options Maxim Mikityanskiy
2021-06-10 16:40 ` [PATCH net v2 1/3] netfilter: synproxy: " Maxim Mikityanskiy
2021-06-10 16:43 ` Florian Westphal [this message]
2021-06-10 16:40 ` [PATCH net v2 2/3] mptcp: " Maxim Mikityanskiy
2021-06-10 16:40 ` [PATCH net v2 3/3] sch_cake: Fix out of bounds when parsing TCP options and header Maxim Mikityanskiy
2021-06-10 21:50 ` [PATCH net v2 0/3] Fix out of bounds when parsing TCP options patchwork-bot+netdevbpf
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