linux-kernel - [PATCH AUTOSEL 5.15 63/68] nfc: virtual_ncidev: change default device permissions

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Date:   Tue, 30 Nov 2021 09:46:59 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Thadeu Lima de Souza Cascardo <cascardo@...onical.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Bongsu Jeon <bongsu.jeon@...sung.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 63/68] nfc: virtual_ncidev: change default device permissions

From: Thadeu Lima de Souza Cascardo <cascardo@...onical.com>

[ Upstream commit c26381f97e2a7df43826150dc7d4c207bd6794a5 ]

Device permissions is S_IALLUGO, with many unnecessary bits. Remove them
and also remove read and write permissions from group and others.

Before the change:
crwsrwsrwt    1 0        0          10, 125 Nov 25 13:59 /dev/virtual_nci

After the change:
crw-------    1 0        0          10, 125 Nov 25 14:05 /dev/virtual_nci

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...onical.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Reviewed-by: Bongsu Jeon <bongsu.jeon@...sung.com>
Link: https://lore.kernel.org/r/20211125141457.716921-1-cascardo@canonical.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/nfc/virtual_ncidev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nfc/virtual_ncidev.c b/drivers/nfc/virtual_ncidev.c
index 221fa3bb8705e..f577449e49350 100644
--- a/drivers/nfc/virtual_ncidev.c
+++ b/drivers/nfc/virtual_ncidev.c
@@ -202,7 +202,7 @@ static int __init virtual_ncidev_init(void)
 	miscdev.minor = MISC_DYNAMIC_MINOR;
 	miscdev.name = "virtual_nci";
 	miscdev.fops = &virtual_ncidev_fops;
-	miscdev.mode = S_IALLUGO;
+	miscdev.mode = 0600;
 
 	return misc_register(&miscdev);
 }
-- 
2.33.0