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| Started by | Kamal Mostafa <kamal@canonical.com> |
|---|---|
| First post | 2015-08-28 00:50 +0200 |
| Last post | 2015-08-28 00:50 +0200 |
| Articles | 1 — 1 participant |
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[PATCH 3.19.y-ckt 017/130] mac80211: clear subdir_stations when removing debugfs Kamal Mostafa <kamal@canonical.com> - 2015-08-28 00:50 +0200
| From | Kamal Mostafa <kamal@canonical.com> |
|---|---|
| Date | 2015-08-28 00:50 +0200 |
| Subject | [PATCH 3.19.y-ckt 017/130] mac80211: clear subdir_stations when removing debugfs |
| Message-ID | <q2e9B-1mE-55@gated-at.bofh.it> |
3.19.8-ckt6 -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 c68896a..2d19963 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) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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