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From: Johannes Berg <>
Cc: Johannes Berg <>
Subject: [PATCH] cfg80211: check reg_rule for NULL in handle_channel_custom()
Date: Fri, 21 Feb 2020 10:44:50 +0100
Message-ID: <20200221104449.3b558a50201c.I4ad3725c4dacaefd2d18d3cc65ba6d18acd5dbfe@changeid> (raw)

From: Johannes Berg <>

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 <>
 net/wireless/reg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 173a7d7a7003..d476d4da0d09 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2278,7 +2278,7 @@ static void handle_channel_custom(struct wiphy *wiphy,
-	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",
 		if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {

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