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wifi: nl80211: hold wdev mutex for tid config 

We need wdev_chandef() in this code, which now requires
the wdev mutex due to the per-link nature. Hold it here
to make sure we can access the link.

Reported-by: syzbot+b4e9aa0f32ffd9902442@syzkaller.appspotmail.com
Fixes: 7b0a0e3c3a ("wifi: cfg80211: do some rework towards MLO link APIs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-06-27 12:43:37 +02:00
parent 77e7b6ba78
commit 206bbcf761
1 changed files with 3 additions and 0 deletions
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3
net/wireless/nl80211.c
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@ -15433,6 +15433,8 @@ static int nl80211_set_tid_config(struct sk_buff *skb,
if (info->attrs[NL80211_ATTR_MAC]) if (info->attrs[NL80211_ATTR_MAC])
tid_config->peer = nla_data(info->attrs[NL80211_ATTR_MAC]); tid_config->peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
wdev_lock(dev->ieee80211_ptr);
nla_for_each_nested(tid, info->attrs[NL80211_ATTR_TID_CONFIG], nla_for_each_nested(tid, info->attrs[NL80211_ATTR_TID_CONFIG],
rem_conf) { rem_conf) {
ret = nla_parse_nested(attrs, NL80211_TID_CONFIG_ATTR_MAX, ret = nla_parse_nested(attrs, NL80211_TID_CONFIG_ATTR_MAX,
@ -15454,6 +15456,7 @@ static int nl80211_set_tid_config(struct sk_buff *skb,
bad_tid_conf: bad_tid_conf:
kfree(tid_config); kfree(tid_config);
wdev_unlock(dev->ieee80211_ptr);
return ret; return ret;
} }