linux-kernel - Re: [PATCH 2/3] ipack: tpci200: fix many double free issues in tpci200_pci

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Date:   Thu, 5 Aug 2021 14:20:13 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Dongliang Mu <mudongliangabcd@...il.com>
Cc:     Samuel Iglesias Gonsalvez <siglesias@...lia.com>,
        Jens Taprogge <jens.taprogge@...rogge.org>,
        Lv Yunlong <lyl2019@...l.ustc.edu.cn>,
        Aditya Srivastava <yashsri421@...il.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        industrypack-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] ipack: tpci200: fix many double free issues in
 tpci200_pci_probe

On Wed, Jul 21, 2021 at 07:11:31PM +0800, Dongliang Mu wrote:
> The function tpci200_register called by tpci200_install and
> tpci200_unregister called by tpci200_uninstall are in pair. However,
> tpci200_unregister has some cleanup operations not in the
> tpci200_register. So the error handling code of tpci200_pci_probe has
> many different double free issues.
> 
> Fix this problem by moving those cleanup operations out of
> tpci200_unregister, into tpci200_pci_remove and reverting
> the previous commit 9272e5d0028d
> 
> Reported-by: Dongliang Mu <mudongliangabcd@...il.com>
> Fixes: 9272e5d0028d ("ipack/carriers/tpci200: Fix a double free in tpci200_pci_probe")
> Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
> ---
>  drivers/ipack/carriers/tpci200.c | 35 ++++++++++++++++----------------
>  1 file changed, 17 insertions(+), 18 deletions(-)

This needs to be applied to the tree now, and should not depend on your
patch 1/3 here as it is a bugfix.  Please redo this series and send 2,
one to be merged for 5.14-final and to go to the stable kernels, and a
separate "clean up things" series that can wait until 5.15-rc1.

thanks,

greg k-h