From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F3BCC43462 for ; Wed, 12 May 2021 19:49:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 303DD6100C for ; Wed, 12 May 2021 19:49:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1382913AbhELTsf (ORCPT ); Wed, 12 May 2021 15:48:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:52106 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352713AbhELSEG (ORCPT ); Wed, 12 May 2021 14:04:06 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8707F61412; Wed, 12 May 2021 18:02:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620842578; bh=eaFzXUGPD19UebBi6DqlyNQJbVt59XWMqXQiVNeK6Cs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eEaSfFdJPqxvneW1OnmbYEsD+aHIt0XFSSQolsYhBjG/rZa8y0hjnU5UZU/5A/R89 k04scFaMBpKYVx4vS6FOCusfAmzroh9aQYURZQoiiPEEAuHe3uID7W7YVqK9EYyXNy qpNQVJQoZbEXcfEQRiV2cgORBa43LnZksMuPTrLIv1U5Hyu4oNPwod4+nEnuAJPX1T JogvaV3dwHiA/46/KOiDR9MdUZm0ObWzE3hOOI3bH9FQL1nzL2LeKiExpQvcc+/oqD FSIwr6gqC2TemeIOqeSuqZbhRoDiKW2BVkcbml6HNiz9MOKrJW18/uYmb301yz0xOm /0E6rRUysCb6Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?=C3=8D=C3=B1igo=20Huguet?= , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.11 31/35] net:CXGB4: fix leak if sk_buff is not used Date: Wed, 12 May 2021 14:02:01 -0400 Message-Id: <20210512180206.664536-31-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210512180206.664536-1-sashal@kernel.org> References: <20210512180206.664536-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Íñigo Huguet [ Upstream commit 52bfcdd87e83d9e69d22da5f26b1512ffc81deed ] An sk_buff is allocated to send a flow control message, but it's not sent in all cases: in case the state is not appropiate to send it or if it can't be enqueued. In the first of these 2 cases, the sk_buff was discarded but not freed, producing a memory leak. Signed-off-by: Íñigo Huguet Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/chelsio/cxgb4/sge.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c index 3334c9e2152a..546301272271 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/sge.c +++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c @@ -2559,12 +2559,12 @@ int cxgb4_ethofld_send_flowc(struct net_device *dev, u32 eotid, u32 tc) spin_lock_bh(&eosw_txq->lock); if (tc != FW_SCHED_CLS_NONE) { if (eosw_txq->state != CXGB4_EO_STATE_CLOSED) - goto out_unlock; + goto out_free_skb; next_state = CXGB4_EO_STATE_FLOWC_OPEN_SEND; } else { if (eosw_txq->state != CXGB4_EO_STATE_ACTIVE) - goto out_unlock; + goto out_free_skb; next_state = CXGB4_EO_STATE_FLOWC_CLOSE_SEND; } @@ -2600,17 +2600,19 @@ int cxgb4_ethofld_send_flowc(struct net_device *dev, u32 eotid, u32 tc) eosw_txq_flush_pending_skbs(eosw_txq); ret = eosw_txq_enqueue(eosw_txq, skb); - if (ret) { - dev_consume_skb_any(skb); - goto out_unlock; - } + if (ret) + goto out_free_skb; eosw_txq->state = next_state; eosw_txq->flowc_idx = eosw_txq->pidx; eosw_txq_advance(eosw_txq, 1); ethofld_xmit(dev, eosw_txq); -out_unlock: + spin_unlock_bh(&eosw_txq->lock); + return 0; + +out_free_skb: + dev_consume_skb_any(skb); spin_unlock_bh(&eosw_txq->lock); return ret; } -- 2.30.2