linux-kernel - [PATCH] proc: warn if registering world writeable files

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Message-ID: <20101216203217.GA3581@p183.telecom.by>
Date:	Thu, 16 Dec 2010 22:32:17 +0200
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, davej@...hat.com
Subject: [PATCH] proc: warn if registering world writeable files

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/proc/generic.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -623,6 +623,7 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
 	memcpy(((char *) ent) + sizeof(struct proc_dir_entry), fn, len + 1);
 	ent->name = ((char *) ent) + sizeof(*ent);
 	ent->namelen = len;
+	WARN_ON(S_ISREG(mode) && (mode & S_IWOTH));
 	ent->mode = mode;
 	ent->nlink = nlink;
 	atomic_set(&ent->count, 1);
--
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