linux-kernel - Re: [PATCH 101/190] Revert "PCI: xilinx: Check for __get_free

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Date:   Mon, 26 Apr 2021 19:00:07 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     maz@...nel.org, linux-kernel@...r.kernel.org,
        Kangjie Lu <kjlu@....edu>, Steven Price <steven.price@....com>,
        Mukesh Ojha <mojha@...eaurora.org>
Subject: Re: [PATCH 101/190] Revert "PCI: xilinx: Check for
 __get_free_pages() failure"

On Thu, Apr 22, 2021 at 11:42:24AM +0100, Lorenzo Pieralisi wrote:
> On Wed, Apr 21, 2021 at 02:59:36PM +0200, Greg Kroah-Hartman wrote:
> > This reverts commit 699ca30162686bf305cdf94861be02eb0cf9bda2.
> > 
> > Commits from @umn.edu addresses have been found to be submitted in "bad
> > faith" to try to test the kernel community's ability to review "known
> > malicious" changes.  The result of these submissions can be found in a
> > paper published at the 42nd IEEE Symposium on Security and Privacy
> > entitled, "Open Source Insecurity: Stealthily Introducing
> > Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> > of Minnesota) and Kangjie Lu (University of Minnesota).
> > 
> > Because of this, all submissions from this group must be reverted from
> > the kernel tree and will need to be re-reviewed again to determine if
> > they actually are a valid fix.  Until that work is complete, remove this
> > change to ensure that no problems are being introduced into the
> > codebase.
> > 
> > Cc: Kangjie Lu <kjlu@....edu>
> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> > Cc: Steven Price <steven.price@....com>
> > Cc: Mukesh Ojha <mojha@...eaurora.org>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > ---
> >  drivers/pci/controller/pcie-xilinx.c | 12 ++----------
> >  1 file changed, 2 insertions(+), 10 deletions(-)
> 
> Hi Greg,
> 
> For this revert - the commit we are reverting looked and looks OK
> to me even though honestly I'd revert it just on principle given
> the nuisance it is causing.
> 
> Actually, we have code in -next that is removing the reverted content
> anyway (but not because it is bogus, code in -next is a nice clean-up
> for all PCI drivers from Marc):
> 
> https://git.kernel.org/lpieralisi/pci/c/161260e7f7bc
> 
> Again, happy to go ahead with the revert and rework the queued code
> on top of it, just let me know please.

I'll just drop this revert from my tree so as to not mess up your
follow-up cleanups, thanks for the review!

greg k-h