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From: Greg KH <gregkh@linuxfoundation.org>
To: Greg Thelen <gthelen@google.com>
Cc: stable@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
	Andi Kleen <ak@linux.intel.com>, Kan Liang <kan.liang@intel.com>,
	Stephane Eranian <eranian@google.com>,
	Pasha Tatashin <pasha.tatashin@soleen.com>
Subject: Re: STABLE REQUEST: perf/core: Avoid put_page() when GUP fails
Date: Fri, 19 Nov 2021 15:31:34 +0100	[thread overview]
Message-ID: <YZe1RlVuseJi1M1T@kroah.com> (raw)
In-Reply-To: <xr9335nxwc5y.fsf@gthelen2.svl.corp.google.com>

On Mon, Nov 15, 2021 at 09:39:53AM -0800, Greg Thelen wrote:
> The patch titled ("perf/core: Avoid put_page() when GUP fails") has been
> merged into linus/master as commit
> 4716023a8f6a0f4a28047f14dd7ebdc319606b84.
> 
> The patch fixes an issue present in all v4.14+ kernels that can cause
> page reference count underflow, which can lead to unintentional page
> sharing.
> 
> The patch did not have cc: stable footer, so I'm manually requesting
> -stable inclusion into v4.14+.
> 
> There are some trivial conflicts in older kernels. I'd be happy to
> review/test, if that's useful.

Please provide working versions for 4.14, 4.19, and 5.4.  The others
kernels applied just fine.

thanks,

greg k-h

  reply	other threads:[~2021-11-19 14:31 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-15 17:39 STABLE REQUEST: perf/core: Avoid put_page() when GUP fails Greg Thelen
2021-11-19 14:31 ` Greg KH [this message]
2021-11-22 17:23   ` Greg Thelen

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