linux-kernel - Re: [PATCH] Allow reading tainted flag as user

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Date:	Sun, 22 Apr 2007 10:58:09 +0200
From:	Bastian Blank <bastian@...di.eu.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Theodore Ts'o <tytso@....edu>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Allow reading tainted flag as user

On Sun, Apr 22, 2007 at 01:50:45AM -0700, Andrew Morton wrote:
> On Sun, 22 Apr 2007 10:39:41 +0200 Bastian Blank <bastian@...di.eu.org> wrote:
> 
> > The commit 34f5a39899f3f3e815da64f48ddb72942d86c366 restricted reading
> > of the tainted value. The attached patch changes this back to a
> > write-only check and restores the read behaviour of older versions.
> > 
> > Signed-off-by: Bastian Blank <bastian@...di.eu.org>
> 
> there's no patch here.

Ups.

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 1b255df..c904748 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1676,7 +1676,7 @@ static int proc_dointvec_taint(ctl_table *table, int write, struct file *filp,
 {
 	int op;
 
-	if (!capable(CAP_SYS_ADMIN))
+	if (write && !capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
 	op = OP_OR;

-- 
Captain's Log, star date 21:34.5...

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