From patchwork Fri Jul 23 05:09:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongliang Mu X-Patchwork-Id: 485001 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 E1060C4320A for ; Fri, 23 Jul 2021 05:09:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C416560E96 for ; Fri, 23 Jul 2021 05:09:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229852AbhGWE3M (ORCPT ); Fri, 23 Jul 2021 00:29:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47738 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229698AbhGWE3L (ORCPT ); Fri, 23 Jul 2021 00:29:11 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0BADEC061575; Thu, 22 Jul 2021 22:09:45 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id f1so1900994plt.7; Thu, 22 Jul 2021 22:09:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=PH147XuCWyb6h3MTkLRYNAK5eXqhCfzzFLL0PdUER9M=; b=u+TQD/HHf+RGmWW2Eo+Bg0J0+rKaYoZSUaRklxLTVgr6ecH123Vki37uyvvDDQ/ZDC 3xsfcSk5oTX8+v3xbifKToSCfyfWVFuah/cKT5oZ2roERRD+FR4O8ZDQbAMghJXKqFAV pyOUB8hC5+H+kfbOwGdHZrmjm8eTraCtlGkL/a8dqRa6swmwOLOcLabxqaCHgg+E605C eY38aRwleVJsac6lXdqMdB1YlOyUuUunnvU+v/zavTaKSx7njtHWM5+qiLETs8HqRlyM kf0zZv1xIjxgYmzE3HetFwJHkNfT6uvhMXer+hqMFGwVfMvOVAk7zJyuQg89RH9LBYN8 TCvQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=PH147XuCWyb6h3MTkLRYNAK5eXqhCfzzFLL0PdUER9M=; b=YIbs7MiqRwcooXaY2Z7utx3muS8jSsB6vJe1LVw6yJr5DwTRScCZjjA7PP3IL8r8yW rFOVKZ1wr5jyA/TcgUDdAekWWgpQq9JEumaPevC4DlC8es0KWkUDPGJKBWigYNcoaAvq j6fdh8TO+JCfSSB/06s07AJEflacWChKlzcmtH3uZ0qoEwFnR3UBAg7/WBm9j51+oXAQ ASFjx5M7wDaNffqTNOVWm8RXqiYTCQgYOl+86Qzw1RQ+y6XfpDz5CwHFoIYn2j2NDubl 6CwMA0ESO1GyqS+/xFVMSZ0gf4h2uc2b793wkk3LLd1z0iuy5BgWK6Assu7kCONhwttz GZQQ== X-Gm-Message-State: AOAM530PPeRhFzEhVjwDuUAdxlr18T1RN+ZKnpMcWTrzCbZzDAUxtc+w 6wfmJWPGQHI+bBTGdsDGXrI= X-Google-Smtp-Source: ABdhPJxZi4QW2uiefQyknp3u4VnPLC6l95TEgpMpYcsGOoYx7Q5jBBz91jAOB88oF+BoR4HvsK//zw== X-Received: by 2002:a17:902:ed95:b029:ee:aa46:547a with SMTP id e21-20020a170902ed95b02900eeaa46547amr2511805plj.27.1627016984441; Thu, 22 Jul 2021 22:09:44 -0700 (PDT) Received: from localhost.localdomain ([154.16.166.166]) by smtp.gmail.com with ESMTPSA id s193sm32917483pfc.183.2021.07.22.22.09.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Jul 2021 22:09:43 -0700 (PDT) From: Dongliang Mu To: Johannes Berg , Kalle Valo , "David S. Miller" , Jakub Kicinski , Luca Coelho , Ilan Peer Cc: Dongliang Mu , syzbot+1638e7c770eef6b6c0d0@syzkaller.appspotmail.com, Johannes Berg , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] cfg80211: free the object allocated in wiphy_apply_custom_regulatory Date: Fri, 23 Jul 2021 13:09:14 +0800 Message-Id: <20210723050919.1910964-1-mudongliangabcd@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org The commit beee24695157 ("cfg80211: Save the regulatory domain when setting custom regulatory") forgets to free the newly allocated regd object. Fix this by freeing the regd object in the error handling code and deletion function - mac80211_hwsim_del_radio. Reported-by: syzbot+1638e7c770eef6b6c0d0@syzkaller.appspotmail.com Fixes: beee24695157 ("cfg80211: Save the regulatory domain when setting custom regulatory") Signed-off-by: Dongliang Mu --- drivers/net/wireless/mac80211_hwsim.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index ffa894f7312a..20b870af6356 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -3404,6 +3404,8 @@ static int mac80211_hwsim_new_radio(struct genl_info *info, debugfs_remove_recursive(data->debugfs); ieee80211_unregister_hw(data->hw); failed_hw: + if (param->regd) + kfree_rcu(get_wiphy_regdom(data->hw->wiphy)); device_release_driver(data->dev); failed_bind: device_unregister(data->dev); @@ -3454,6 +3456,8 @@ static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data, { hwsim_mcast_del_radio(data->idx, hwname, info); debugfs_remove_recursive(data->debugfs); + if (data->regd) + kfree_rcu(get_wiphy_regdom(data->hw->wiphy)); ieee80211_unregister_hw(data->hw); device_release_driver(data->dev); device_unregister(data->dev);