leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mac80211_hwsim: fix RCU protected chanctx access

Browse Source 
We need to RCU protect the chanctx_conf access, so
do that.

Fixes: 585625c955 ("mac80211_hwsim: check TX and STA bandwidth")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20220505230421.fb8055c081a2.Ic6da3307c77a909bd61a0ea25dc2a4b08fe1b03f@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-05-05 23:04:21 +02:00
parent c7e34c1e26
commit a59d55568d
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/wireless/mac80211_hwsim.c
View File

@ -2202,11 +2202,14 @@ mac80211_hwsim_sta_rc_update(struct ieee80211_hw *hw,
if (!data->use_chanctx) {
confbw = data->bw;
} else {
struct ieee80211_chanctx_conf *chanctx_conf =
rcu_dereference(vif->chanctx_conf);
struct ieee80211_chanctx_conf *chanctx_conf;
rcu_read_lock();
chanctx_conf = rcu_dereference(vif->chanctx_conf);
if (!WARN_ON(!chanctx_conf))
confbw = chanctx_conf->def.width;
rcu_read_unlock();
}
WARN(bw > hwsim_get_chanwidth(confbw),