linux-kernel - Re: CVE-2024-27429: netrom: Fix a data-race around sysctl_netrom_obsolescence_count

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Message-ID: <ZkzGL_vXciG7ipm5@tiehlicka>
Date: Tue, 21 May 2024 18:05:03 +0200
From: Michal Hocko <mhocko@...e.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: cve@...nel.org, linux-kernel@...r.kernel.org,
	Jason Xing <kernelxing@...cent.com>,
	linux-cve-announce@...r.kernel.org
Subject: Re: CVE-2024-27429: netrom: Fix a data-race around
 sysctl_netrom_obsolescence_count_initialiser

On Tue 21-05-24 16:40:24, Greg KH wrote:
> On Tue, May 21, 2024 at 10:39:04AM +0200, Michal Hocko wrote:
> > This and couple of others are all having the same pattern. Adding
> > READ_ONCE for an integer value with a claim that this might race with
> > sysctl updates. While the claim about the race is correct I fail to see
> > how this could have any security consequences. Even if a partial write
> > was observed which sounds _more_ than theoretical these all are merely
> > timeouts and delays.
> > 
> > Is there anything I am missing?
> 
> Nope, you are right, our fault, I'll go revoke this now.

please also revoke all others touching the same function.

-- 
Michal Hocko
SUSE Labs