From patchwork Fri Nov 3 06:07:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "D. Wythe" X-Patchwork-Id: 13444338 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4EEDC17EE for ; Fri, 3 Nov 2023 06:07:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B1091B5; Thu, 2 Nov 2023 23:07:51 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R171e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046056;MF=alibuda@linux.alibaba.com;NM=1;PH=DS;RN=9;SR=0;TI=SMTPD_---0VvYF2Ih_1698991667; Received: from j66a10360.sqa.eu95.tbsite.net(mailfrom:alibuda@linux.alibaba.com fp:SMTPD_---0VvYF2Ih_1698991667) by smtp.aliyun-inc.com; Fri, 03 Nov 2023 14:07:47 +0800 From: "D. Wythe" To: kgraul@linux.ibm.com, wenjia@linux.ibm.com, jaka@linux.ibm.com, wintera@linux.ibm.com Cc: kuba@kernel.org, davem@davemloft.net, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org Subject: [PATCH net v2 3/3] net/smc: put sk reference if close work was canceled Date: Fri, 3 Nov 2023 14:07:40 +0800 Message-Id: <1698991660-82957-4-git-send-email-alibuda@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1698991660-82957-1-git-send-email-alibuda@linux.alibaba.com> References: <1698991660-82957-1-git-send-email-alibuda@linux.alibaba.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: X-Patchwork-Delegate: kuba@kernel.org From: "D. Wythe" Note that we always hold a reference to sock when attempting to submit close_work. Therefore, if we have successfully canceled close_work from pending, we MUST release that reference to avoid potential leaks. Fixes: 42bfba9eaa33 ("net/smc: immediate termination for SMCD link groups") Signed-off-by: D. Wythe Reviewed-by: Dust Li --- net/smc/smc_close.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c index 449ef45..10219f5 100644 --- a/net/smc/smc_close.c +++ b/net/smc/smc_close.c @@ -116,7 +116,8 @@ static void smc_close_cancel_work(struct smc_sock *smc) struct sock *sk = &smc->sk; release_sock(sk); - cancel_work_sync(&smc->conn.close_work); + if (cancel_work_sync(&smc->conn.close_work)) + sock_put(sk); cancel_delayed_work_sync(&smc->conn.tx_work); lock_sock(sk); }