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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, 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 D128CC636C8 for ; Thu, 15 Jul 2021 19:40:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BA89161278 for ; Thu, 15 Jul 2021 19:40:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343748AbhGOTnA (ORCPT ); Thu, 15 Jul 2021 15:43:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:50994 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244623AbhGOTO7 (ORCPT ); Thu, 15 Jul 2021 15:14:59 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id D98B3613FD; Thu, 15 Jul 2021 19:10:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626376248; bh=Ia9rktBdiHb6EMa1fSBNeBeKeuUl/zIf8i7KRp0qjnQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J8z1EdyK8SGzMRxgLULm743t5IdmI1mLGqQkBjmrTMtsJDKBThd9iCKollmE/3l0k jJUp0aiAB5aGDHBAnP7PBdQ+QrzNMADG3WJUfGm7DtekGA6XXeaIF8EfwdLGoq0rut 9P23opyBabGAuxpuBlvb9zrwCGawiHcArt4YqmXA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Luiz Augusto von Dentz , Marcel Holtmann , Sasha Levin Subject: [PATCH 5.13 163/266] Bluetooth: L2CAP: Fix invalid access if ECRED Reconfigure fails Date: Thu, 15 Jul 2021 20:38:38 +0200 Message-Id: <20210715182641.394643404@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210715182613.933608881@linuxfoundation.org> References: <20210715182613.933608881@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Luiz Augusto von Dentz [ Upstream commit 1fa20d7d4aad02206e84b74915819fbe9f81dab3 ] The use of l2cap_chan_del is not safe under a loop using list_for_each_entry. Reported-by: Dan Carpenter Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Marcel Holtmann Signed-off-by: Sasha Levin --- net/bluetooth/l2cap_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index b6a88b8256c7..9b6e57204f51 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -6248,7 +6248,7 @@ static inline int l2cap_ecred_reconf_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) { - struct l2cap_chan *chan; + struct l2cap_chan *chan, *tmp; struct l2cap_ecred_conn_rsp *rsp = (void *) data; u16 result; @@ -6262,7 +6262,7 @@ static inline int l2cap_ecred_reconf_rsp(struct l2cap_conn *conn, if (!result) return 0; - list_for_each_entry(chan, &conn->chan_l, list) { + list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { if (chan->ident != cmd->ident) continue; -- 2.30.2