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UPSTREAM: 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.

Bug: 254441685
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>
(cherry picked from commit f624bb6fad)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I65e12c70a6142b73e98fa716586271c1ddf4ad56
This commit is contained in:
Johannes Berg
2023-03-01 12:09:29 +02:00
committed by Lee Jones
parent 9e7678cc60
commit d0e0e85d34
1 changed files with 1 additions and 1 deletions
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2
net/wireless/nl80211.c
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@@ -8815,7 +8815,7 @@ 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;
/*