korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-03 00:54:09 +08:00
Code Issues Packages Projects Releases Wiki Activity

wifi: mac80211: check for station first in client probe

Browse Source 
When probing a client, first check if we have it, and then
check for the channel context, otherwise you can trigger
the warning there easily by probing when the AP isn't even
started yet. Since a client existing means the AP is also
operating, we can then keep the warning.

Also simplify the moved code a bit.

Reported-by: syzbot+999fac712d84878a7379@syzkaller.appspotmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2023-08-15 18:41:32 +02:00
parent abc76cf552
commit 67dfa589aa
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
net/mac80211/cfg.c
View File

@ -4133,19 +4133,20 @@ static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
mutex_lock(&local->mtx);
rcu_read_lock();
sta = sta_info_get_bss(sdata, peer);
if (!sta) {
ret = -ENOLINK;
goto unlock;
}
qos = sta->sta.wme;
chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
if (WARN_ON(!chanctx_conf)) {
ret = -EINVAL;
goto unlock;
}
band = chanctx_conf->def.chan->band;
sta = sta_info_get_bss(sdata, peer);
if (sta) {
qos = sta->sta.wme;
} else {
ret = -ENOLINK;
goto unlock;
}
if (qos) {
fc = cpu_to_le16(IEEE80211_FTYPE_DATA |