linux-kernel - Re: locks use-after-free stable request

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Date:   Tue, 24 Mar 2020 15:43:38 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Mark Salyzyn <salyzyn@...roid.com>
Cc:     stable <stable@...r.kernel.org>,
        Android Kernel Team <kernel-team@...roid.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: locks use-after-free stable request

On Tue, Mar 24, 2020 at 07:24:49AM -0700, Mark Salyzyn wrote:
> Referencing upstream fixes commit dcf23ac3e846ca0cf626c155a0e3fcbbcf4fae8a
> ("locks: reinstate locks_delete_block optimization") and commit
> 6d390e4b5d48ec03bb87e63cf0a2bff5f4e116da ("locks: fix a potential
> use-after-free problem when wakeup a waiter") and possibly address
> CVE-2019-19769.
> 
> Please apply to all relevant stable trees including 5.4, 4.19 and below.
> Confirmed they apply cleanly to 5.4 and 4.19.
> 
> 
> Signed-off-by: Mark Salyzyn <salyzyn@...roid.com>
> 
> Cc: stable@...r.kernel.org
> 
> Cc: linux-kernel@...r.kernel.org
> 
> Cc: kernel-team@...roid.com
> 

These are all queued up for the next round of 5.4 and 5.5 stable
releases,but they do not seem to apply to 4.19.

And why do you think they apply to 4.19, that's not what 6d390e4b5d48
("locks: fix a potential use-after-free problem when wakeup a waiter")
says.

confused,

greg k-h