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| author | Johannes Berg <johannes.berg@intel.com> | 2023-03-01 12:09:29 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2023-03-10 11:46:22 +0100 |
| commit | f624bb6fad23df3270580b4fcef415c6e7bf7705 (patch) | |
| tree | 331684e004dc63232cc9cf0485a1e02395121b19 | |
| parent | 44889ba56cbb3d51154660ccd15818bc77276696 (diff) | |
| download | linux-stable-f624bb6fad23df3270580b4fcef415c6e7bf7705.tar.gz linux-stable-f624bb6fad23df3270580b4fcef415c6e7bf7705.tar.bz2 linux-stable-f624bb6fad23df3270580b4fcef415c6e7bf7705.zip | |
wifi: nl80211: fix NULL-ptr deref in offchan check
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: 7b0a0e3c3a88 ("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>
| -rw-r--r-- | net/wireless/nl80211.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 112b4bb009c8..51f6582eff7b 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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; /* |