linux-kernel - [PATCH 1/9] drivers/mtd/devices/docg3.c: avoid world-writable sysfs files.

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Message-Id: <1398137612-9714-2-git-send-email-rusty@rustcorp.com.au>
Date:	Tue, 22 Apr 2014 13:03:24 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	linux-kernel@...r.kernel.org
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	Robert Jarzmik <robert.jarzmik@...e.fr>
Subject: [PATCH 1/9] drivers/mtd/devices/docg3.c: avoid world-writable sysfs files.

In line with practice for module parameters, we're adding a build-time
check that sysfs files aren't world-writable.

Cc: Robert Jarzmik <robert.jarzmik@...e.fr>
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
---
 drivers/mtd/devices/docg3.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c
index dd5e1018d37b..91a169c44b39 100644
--- a/drivers/mtd/devices/docg3.c
+++ b/drivers/mtd/devices/docg3.c
@@ -1608,8 +1608,8 @@ static ssize_t dps1_insert_key(struct device *dev,
 #define FLOOR_SYSFS(id) { \
 	__ATTR(f##id##_dps0_is_keylocked, S_IRUGO, dps0_is_key_locked, NULL), \
 	__ATTR(f##id##_dps1_is_keylocked, S_IRUGO, dps1_is_key_locked, NULL), \
-	__ATTR(f##id##_dps0_protection_key, S_IWUGO, NULL, dps0_insert_key), \
-	__ATTR(f##id##_dps1_protection_key, S_IWUGO, NULL, dps1_insert_key), \
+	__ATTR(f##id##_dps0_protection_key, S_IWUSR|S_IWGRP, NULL, dps0_insert_key), \
+	__ATTR(f##id##_dps1_protection_key, S_IWUSR|S_IWGRP, NULL, dps1_insert_key), \
 }
 
 static struct device_attribute doc_sys_attrs[DOC_MAX_NBFLOORS][4] = {
-- 
1.8.3.2

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