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wifi: nl80211: fix NULL-ptr deref in offchan check

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If, e.g. in AP mode, the link was already created by userspace
but not activated yet, it has a chandef but the chandef isn't
valid and has no channel. Check for this and ignore this link.

Fixes: 7b0a0e3c3a ("wifi: cfg80211: do some rework towards MLO link APIs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230301115906.71bd4803fbb9.Iee39c0f6c2d3a59a8227674dc55d52e38b1090cf@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2023-03-01 12:09:29 +02:00
parent 44889ba56c
commit f624bb6fad
1 changed files with 1 additions and 1 deletions
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2
net/wireless/nl80211.c
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@ -8901,7 +8901,7 @@ static bool cfg80211_off_channel_oper_allowed(struct wireless_dev *wdev,
struct cfg80211_chan_def *chandef;
chandef = wdev_chandef(wdev, link_id);
if (!chandef)
if (!chandef || !chandef->chan)
continue;
/*