From: Nicolai Stange <nstange@xxxxxxx>
[ Upstream commit c7bf1fb7ddca331780b9a733ae308737b39f1ad4 ]
Commit e5e884b42639 ("libertas: Fix two buffer overflows at parsing bss
descriptor") introduced a bounds check on the number of supplied rates to
lbs_ibss_join_existing().
Unfortunately, it introduced a return path from within a RCU read side
critical section without a corresponding rcu_read_unlock(). Fix this.
Fixes: e5e884b42639 ("libertas: Fix two buffer overflows at parsing bss descriptor")
Signed-off-by: Nicolai Stange <nstange@xxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/wireless/libertas/cfg.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/wireless/libertas/cfg.c b/drivers/net/wireless/libertas/cfg.c
index 0824697c3dca0..803684eed142c 100644
--- a/drivers/net/wireless/libertas/cfg.c
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -1853,6 +1853,7 @@ static int lbs_ibss_join_existing(struct lbs_private *priv,
rates_max = rates_eid[1];
if (rates_max > MAX_RATES) {
lbs_deb_join("invalid rates");
+ rcu_read_unlock();
goto out;
}
rates = cmd.bss.rates;
--
2.20.1
