linux-kernel - Re: CVE-2024-50228: mm: shmem: fix data-race in shmem

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Message-ID: <20241125212946.GE3387508@ZenIV>
Date: Mon, 25 Nov 2024 21:29:46 +0000
From: Al Viro <viro@...iv.linux.org.uk>
To: Greg KH <gregkh@...uxfoundation.org>
Cc: Nanyong Sun <sunnanyong@...wei.com>, cve@...nel.org,
	linux-cve-announce@...r.kernel.org, linux-kernel@...r.kernel.org,
	aha310510@...il.com, Hugh Dickins <hughd@...gle.com>
Subject: Re: CVE-2024-50228: mm: shmem: fix data-race in shmem_getattr()

On Mon, Nov 25, 2024 at 10:16:37PM +0100, Greg KH wrote:
> On Mon, Nov 25, 2024 at 03:49:44PM +0800, Nanyong Sun wrote:
> > Hi Greg,
> >   Will this CVE be rejected in the future? This patch has introduced a
> > problem and has been reverted:
> > https://lore.kernel.org/all/20241116233053.F1FBAC4CEC3@smtp.kernel.org/T/
> > 
> 
> What is the git commit id of this change?  Is it in Linus's tree yet?
> And did the original syzbot splat get fixed some other way?

Revert in mainline is d1aa0c04294e29883d65eac6c2f72fe95cc7c049; patch
had really been pointless and we'd better watch out for its analogues
being introduced.

IMO "fixes a data-race" in patch description has become a serious red flag
for review by now.  Some of them are valid, some are pointless and occasionally
actively harmful.