diff options
| author | Johannes Berg | 2019-04-15 11:39:33 +0200 |
|---|---|---|
| committer | Johannes Berg | 2019-04-23 13:47:05 +0200 |
| commit | 517879147493a5e1df6b89a50f708f1133fcaddb (patch) | |
| tree | cfab240254cb1dc2b7954abc73e48ce290e07718 /net/mac80211 | |
| parent | 8772eed9a95abd82cf188c93edb9645543ca4418 (diff) | |
mac80211: don't attempt to rename ERR_PTR() debugfs dirs
We need to dereference the directory to get its parent to
be able to rename it, so it's clearly not safe to try to
do this with ERR_PTR() pointers. Skip in this case.
It seems that this is most likely what was causing the
report by syzbot, but I'm not entirely sure as it didn't
come with a reproducer this time.
Cc: stable@vger.kernel.org
Reported-by: syzbot+4ece1a28b8f4730547c9@syzkaller.appspotmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/debugfs_netdev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c index cff0fb3578c9..deb3faf08337 100644 --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -841,7 +841,7 @@ void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata) dir = sdata->vif.debugfs_dir; - if (!dir) + if (IS_ERR_OR_NULL(dir)) return; sprintf(buf, "netdev:%s", sdata->name); |