linux-kernel - [PATCH] w1: don't allow arbitrary users to remove w1 devices

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <1283957327-32324-1-git-send-email-linus.walleij@stericsson.com>
Date:	Wed, 8 Sep 2010 16:48:47 +0200
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	<linux-kernel@...r.kernel.org>
Cc:	Brian Swetland <swetland@...gle.com>,
	Linus Walleij <linus.walleij@...ricsson.com>
Subject: [PATCH] w1: don't allow arbitrary users to remove w1 devices

From: Brian Swetland <swetland@...gle.com>

The search/pullup/add/remove device attributes were 0666 which would
allow arbitrary users to affect the 1 wire bus.  Change to 0664 to
prevent that.

Cc:Evgeniy Polyakov <johnpol@....mipt.ru>
Signed-off-by: Brian Swetland <swetland@...gle.com>
Signed-off-by: Linus Walleij <linus.walleij@...ricsson.com>
---
I found this patch in the Android tree, apparently this has never
been sent upstream so doing it now.
---
 drivers/w1/w1.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 2839e28..b7b5014 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -517,10 +517,10 @@ static W1_MASTER_ATTR_RO(max_slave_count, S_IRUGO);
 static W1_MASTER_ATTR_RO(attempts, S_IRUGO);
 static W1_MASTER_ATTR_RO(timeout, S_IRUGO);
 static W1_MASTER_ATTR_RO(pointer, S_IRUGO);
-static W1_MASTER_ATTR_RW(search, S_IRUGO | S_IWUGO);
-static W1_MASTER_ATTR_RW(pullup, S_IRUGO | S_IWUGO);
-static W1_MASTER_ATTR_RW(add, S_IRUGO | S_IWUGO);
-static W1_MASTER_ATTR_RW(remove, S_IRUGO | S_IWUGO);
+static W1_MASTER_ATTR_RW(search, S_IRUGO | S_IWUSR | S_IWGRP);
+static W1_MASTER_ATTR_RW(pullup, S_IRUGO | S_IWUSR | S_IWGRP);
+static W1_MASTER_ATTR_RW(add, S_IRUGO | S_IWUSR | S_IWGRP);
+static W1_MASTER_ATTR_RW(remove, S_IRUGO | S_IWUSR | S_IWGRP);
 
 static struct attribute *w1_master_default_attrs[] = {
 	&w1_master_attribute_name.attr,
-- 
1.6.3.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/