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wifi: mac80211: check link exists before use

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If the assoc link doesn't exist yet at this point, we
cannot use it yet. This isn't normally the case, but
e.g. in case of FT-DS (or just broken userspace) the
link might not be set up yet and will only be created
later in this function. Check that the link exists.

Fixes: 310c8387c6 ("wifi: mac80211: clean up connection process")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/3151f5d0-c18f-413d-b34b-b94f095b947c@moroto.mountain
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240301193633.c886d300e90a.Ie1d5e23b2a033d934d343c37249f6f4dfddcc5fe@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2024-03-01 19:36:33 +01:00
parent 01ad6b7be1
commit 2a705bc314
1 changed files with 1 additions and 1 deletions
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2
net/mac80211/mlme.c
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@ -8173,7 +8173,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
eth_random_addr(assoc_data->link[i].addr);
sband = local->hw.wiphy->bands[link_cbss->channel->band];
if (match_auth && i == assoc_link_id)
if (match_auth && i == assoc_link_id && link)
assoc_data->link[i].conn = link->u.mgd.conn;
else
assoc_data->link[i].conn =