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| author | Tom Hughes <tom@compton.nu> | 2015-06-29 19:41:49 +0100 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-08-19 08:36:36 +0200 |
| commit | 0045487d757bee35e949dc3d376e7291b9f0ee1f (patch) | |
| tree | 8ab899eb755a0b06b8adcd98be173dacb3d275b9 | |
| parent | f603c11c7dba4dfd388312c8c94757a90483a17d (diff) | |
| download | lwn-0045487d757bee35e949dc3d376e7291b9f0ee1f.tar.gz lwn-0045487d757bee35e949dc3d376e7291b9f0ee1f.zip | |
mac80211: clear subdir_stations when removing debugfs
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: Jiri Slaby <jslaby@suse.cz>
| -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 8e41f0163c5a..92be2863b7db 100644 --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -698,6 +698,7 @@ 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) |