diff options
| author | Tom Hughes <tom@compton.nu> | 2015-06-29 19:41:49 +0100 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-08-27 13:25:43 -0400 |
| commit | 2dcae0edb07eff075666c233d4e2ac3294d9e99e (patch) | |
| tree | 2303ad9b80add974c9234f5ff17ca8bd194a278e /net | |
| parent | 845a83bb5a03839b77c5b1ccc32ded17f3d4b841 (diff) | |
mac80211: clear subdir_stations when removing debugfs
[ Upstream commit 4479004e6409087d1b4986881dc98c6c15dffb28 ]
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]
Cc: stable@kernel.org
Signed-off-by: Tom Hughes <tom@compton.nu>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/debugfs_netdev.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c index c68896adfa96..2d19963e6d97 100644 --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -725,6 +725,7 @@ 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) |