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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Stefan Wahren <stefan.wahren@i2se.com>,
        Franky Lin <franky.lin@broadcom.com>,
        Kalle Valo <kvalo@codeaurora.org>,
        Ben Hutchings <ben.hutchings@codethink.co.uk>
Subject: [PATCH 4.4 08/24] brcmfmac: Fix check for ISO3166 code
Date:   Tue, 12 Jun 2018 18:51:52 +0200
Message-Id: <20180612164816.963565286@linuxfoundation.org>
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4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stefan Wahren <stefan.wahren@i2se.com>

commit 9b9322db5c5a1917a66c71fe47c3848a9a31227e upstream.

The commit "regulatory: add NUL to request alpha2" increases the length of
alpha2 to 3. This causes a regression on brcmfmac, because
brcmf_cfg80211_reg_notifier() expect valid ISO3166 codes in the complete
array. So fix this accordingly.

Fixes: 657308f73e67 ("regulatory: add NUL to request alpha2")
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[bwh: Backported to 4.4: adjust filename]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
@@ -6167,7 +6167,7 @@ static void brcmf_cfg80211_reg_notifier(
 		  req->alpha2[0], req->alpha2[1]);
 
 	/* ignore non-ISO3166 country codes */
-	for (i = 0; i < sizeof(req->alpha2); i++)
+	for (i = 0; i < 2; i++)
 		if (req->alpha2[i] < 'A' || req->alpha2[i] > 'Z') {
 			brcmf_err("not a ISO3166 code\n");
 			return;