cfg80211: check reg_rule for NULL in handle_channel_custom()

[ Upstream commit a7ee7d44b57c9ae174088e53a668852b7f4f452d ]

We may end up with a NULL reg_rule after the loop in
handle_channel_custom() if the bandwidth didn't fit,
check if this is the case and bail out if so.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20200221104449.3b558a50201c.I4ad3725c4dacaefd2d18d3cc65ba6d18acd5dbfe@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 018c60b..32f5758 100644 (file)
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2269,7 +2269,7 @@ static void handle_channel_custom(struct wiphy *wiphy,
                        break;
        }
 
-       if (IS_ERR(reg_rule)) {
+       if (IS_ERR_OR_NULL(reg_rule)) {
                pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n",
                         chan->center_freq);
                if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {