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=-9.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 B086BC43441 for ; Wed, 14 Nov 2018 22:35:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7500A208E7 for ; Wed, 14 Nov 2018 22:35:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="AlEWdsvY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7500A208E7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388795AbeKOIkF (ORCPT ); Thu, 15 Nov 2018 03:40:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:37022 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729148AbeKOI3z (ORCPT ); Thu, 15 Nov 2018 03:29:55 -0500 Received: from sasha-vm.mshome.net (unknown [64.114.255.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B8F8722529; Wed, 14 Nov 2018 22:24:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542234290; bh=bDzVpBEeasCK6L2LHb5Avj++8I4uhG/rkiWq/6M38lw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AlEWdsvY+/Mfiz5RXZ7hPA4NREDW6Uvy7iDMNPYtYKK6yxQNbPLOlYcGJhZOEm4dg GZT7OpqzIfwgTw9gSC7zyg5vDv4ZmAwwwOP1FE5OplfAE+7zaj/CUSqUZstYAKQAln +QutJ6NQhK7NHuBocIxLpyh0w1lXTwUdUe8afX4w= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sagiv Ozeri , Denis Bolotin , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.18 50/59] qed: Fix potential memory corruption Date: Wed, 14 Nov 2018 17:23:22 -0500 Message-Id: <20181114222335.99339-50-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114222335.99339-1-sashal@kernel.org> References: <20181114222335.99339-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sagiv Ozeri [ Upstream commit fa5c448d98f0df660bfcad3dd5facc027ef84cd3 ] A stuck ramrod should be deleted from the completion_pending list, otherwise it will be added again in the future and corrupt the list. Return error value to inform that ramrod is stuck and should be deleted. Signed-off-by: Sagiv Ozeri Signed-off-by: Denis Bolotin Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/qlogic/qed/qed_spq.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qed/qed_spq.c b/drivers/net/ethernet/qlogic/qed/qed_spq.c index 43619b6bb232..7106ad17afe2 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_spq.c +++ b/drivers/net/ethernet/qlogic/qed/qed_spq.c @@ -142,6 +142,7 @@ static int qed_spq_block(struct qed_hwfn *p_hwfn, DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); rc = qed_mcp_drain(p_hwfn, p_ptt); + qed_ptt_release(p_hwfn, p_ptt); if (rc) { DP_NOTICE(p_hwfn, "MCP drain failed\n"); goto err; @@ -150,18 +151,15 @@ static int qed_spq_block(struct qed_hwfn *p_hwfn, /* Retry after drain */ rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); if (!rc) - goto out; + return 0; comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; - if (comp_done->done == 1) + if (comp_done->done == 1) { if (p_fw_ret) *p_fw_ret = comp_done->fw_return_code; -out: - qed_ptt_release(p_hwfn, p_ptt); - return 0; - + return 0; + } err: - qed_ptt_release(p_hwfn, p_ptt); DP_NOTICE(p_hwfn, "Ramrod is stuck [CID %08x cmd %02x protocol %02x echo %04x]\n", le32_to_cpu(p_ent->elem.hdr.cid), -- 2.17.1