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[146.241.68.231]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43d82efdffdsm194280015e9.18.2025.04.01.04.01.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 01 Apr 2025 04:01:27 -0700 (PDT) Message-ID: <37f86471-5abc-4f04-954e-c6fb5f2b653a@redhat.com> Date: Tue, 1 Apr 2025 13:01:26 +0200 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net] net/smc: fix general protection fault in __smc_diag_dump To: Wang Liang , wenjia@linux.ibm.com, jaka@linux.ibm.com, alibuda@linux.alibaba.com, tonylu@linux.alibaba.com, guwen@linux.alibaba.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, horms@kernel.org, ubraun@linux.vnet.ibm.com Cc: yuehaibing@huawei.com, zhangchangzhong@huawei.com, linux-rdma@vger.kernel.org, linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250331081003.1503211-1-wangliang74@huawei.com> Content-Language: en-US From: Paolo Abeni In-Reply-To: <20250331081003.1503211-1-wangliang74@huawei.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/31/25 10:10 AM, Wang Liang wrote: > diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c > index 3e6cb35baf25..454801188514 100644 > --- a/net/smc/af_smc.c > +++ b/net/smc/af_smc.c > @@ -371,6 +371,7 @@ void smc_sk_init(struct net *net, struct sock *sk, int protocol) > sk->sk_protocol = protocol; > WRITE_ONCE(sk->sk_sndbuf, 2 * READ_ONCE(net->smc.sysctl_wmem)); > WRITE_ONCE(sk->sk_rcvbuf, 2 * READ_ONCE(net->smc.sysctl_rmem)); > + smc->clcsock = NULL; > INIT_WORK(&smc->tcp_listen_work, smc_tcp_listen_work); > INIT_WORK(&smc->connect_work, smc_connect_work); > INIT_DELAYED_WORK(&smc->conn.tx_work, smc_tx_work); The syzkaller report has a few reproducers, have you tested this? AFAICS the smc socket is already zeroed on allocation by sk_alloc(). /P