From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35181 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992808AbbHHUhr (ORCPT ); Sat, 8 Aug 2015 16:37:47 -0400 Subject: Patch "mac80211: clear subdir_stations when removing debugfs" has been added to the 4.1-stable tree To: tom@compton.nu, gregkh@linuxfoundation.org, johannes.berg@intel.com Cc: , From: Date: Sat, 08 Aug 2015 13:37:46 -0700 Message-ID: <1439066266068@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled mac80211: clear subdir_stations when removing debugfs to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mac80211-clear-subdir_stations-when-removing-debugfs.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 4479004e6409087d1b4986881dc98c6c15dffb28 Mon Sep 17 00:00:00 2001 From: Tom Hughes Date: Mon, 29 Jun 2015 19:41:49 +0100 Subject: mac80211: clear subdir_stations when removing debugfs From: Tom Hughes commit 4479004e6409087d1b4986881dc98c6c15dffb28 upstream. If we don't do this, and we then fail to recreate the debugfs directory during a mode change, then we will fail later trying to add stations to this now bogus directory: BUG: unable to handle kernel NULL pointer dereference at 0000006c IP: [] mutex_lock+0x12/0x30 Call Trace: [] start_creating+0x44/0xc0 [] debugfs_create_dir+0x13/0xf0 [] ieee80211_sta_debugfs_add+0x6e/0x490 [mac80211] Signed-off-by: Tom Hughes Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- net/mac80211/debugfs_netdev.c | 1 + 1 file changed, 1 insertion(+) --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -723,6 +723,7 @@ void ieee80211_debugfs_remove_netdev(str debugfs_remove_recursive(sdata->vif.debugfs_dir); sdata->vif.debugfs_dir = NULL; + sdata->debugfs.subdir_stations = NULL; } void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata) Patches currently in stable-queue which might be from tom@compton.nu are queue-4.1/mac80211-clear-subdir_stations-when-removing-debugfs.patch