lkml.org 
[lkml]   [2015]   [Sep]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3.13.y-ckt 08/60] mac80211: clear subdir_stations when removing debugfs
Date
3.13.11-ckt26 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tom Hughes <tom@compton.nu>

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: [<c0a92202>] mutex_lock+0x12/0x30
Call Trace:
[<c0678ab4>] start_creating+0x44/0xc0
[<c0679203>] debugfs_create_dir+0x13/0xf0
[<f8a938ae>] ieee80211_sta_debugfs_add+0x6e/0x490 [mac80211]

Signed-off-by: Tom Hughes <tom@compton.nu>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
net/mac80211/debugfs_netdev.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index cae3d14..a6119a2 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -705,6 +705,7 @@ void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)

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)
--
1.9.1


\
 
 \ /
  Last update: 2015-09-02 03:41    [W:0.185 / U:0.172 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site