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From:   Rudi Heitbaum <rudi@heitbaum.com>
Date:   Wed, 10 May 2023 21:58:06 +1000
Message-ID: <CAG9oJskrJotpyqwi6AHVMmhnFmL+Ym=xAFmL51RiZFaU78wv-A@mail.gmail.com>
Subject: Re: [PATCH 6.3 000/694] 6.3.2-rc2 review
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     stable@vger.kernel.org, patches@lists.linux.dev,
        linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
        akpm@linux-foundation.org, linux@roeck-us.net, shuah@kernel.org,
        patches@kernelci.org, lkft-triage@lists.linaro.org, pavel@denx.de,
        jonathanh@nvidia.com, f.fainelli@gmail.com,
        sudipm.mukherjee@gmail.com, srw@sladewatkins.net, rwarsow@gmx.de,
        ntfs3@lists.linux.dev, almaz.alexandrovich@paragon-software.com
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On Wed, 10 May 2023 at 19:09, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Wed, May 10, 2023 at 06:29:23PM +1000, Rudi Heitbaum wrote:
> > On Wed, 10 May 2023 at 17:25, Greg Kroah-Hartman
> > <gregkh@linuxfoundation.org> wrote:
> > >
> > > On Tue, May 09, 2023 at 02:58:06PM +0000, Rudi Heitbaum wrote:
> > > > On Tue, May 09, 2023 at 03:56:42PM +0200, Greg Kroah-Hartman wrote:
> > > > > On Tue, May 09, 2023 at 01:10:32PM +0000, Rudi Heitbaum wrote:
> > > > > > On Tue, May 09, 2023 at 08:06:58AM +0000, Rudi Heitbaum wrote:
> > > > > > > On Tue, May 09, 2023 at 05:26:44AM +0200, Greg Kroah-Hartman wrote:
> > > > > > > > This is the start of the stable review cycle for the 6.3.2 release.
> > > > > > > > There are 694 patches in this series, all will be posted as a response
> > > > > > > > to this one.  If anyone has any issues with these being applied, please
> > > > > > > > let me know.
> > > > > > > >
> > > > > > > > Responses should be made by Thu, 11 May 2023 03:05:05 +0000.
> > > > > > > > Anything received after that time might be too late.
> > > > > > >
> > > > > > > Hi Greg,
> > > > > > >
> > > > > > > 6.3.2-rc2 tested.
> > > > > >
> > > > > > Hi Greg,
> > > > > >
> > > > > > Further testing and have seen ntfs3: NULL pointer dereference with ntfs_lookup errors
> > > > > > with 6.3.2-rc2 (I have not seen this error before.) No other errors in the logs.
> > > > >
> > > > > Can you reproduce this without the extern, gpl-violation module loaded?
> > > > >
> > > > > thanks,
> > > > >
> > > > > greg k-h
> > > >
> > > > Hi Greg,
> > > >
> > > > I dropped the bcm_sta and recompiled and commented out the i915.guc=3
> > > > and was able to reproduce.
> > > >
> > > > [   84.745080] BUG: kernel NULL pointer dereference, address: 0000000000000020
> > > > [   84.746239] #PF: supervisor read access in kernel mode
> > > > [   84.747599] #PF: error_code(0x0000) - not-present page
> > > > [   84.748929] PGD 0 P4D 0
> > > > [   84.750240] Oops: 0000 [#1] SMP NOPTI
> > > > [   84.751575] CPU: 2 PID: 3176 Comm: .NET ThreadPool Not tainted 6.3.2-rc2 #1
> > > > [   84.752998] Hardware name: Intel(R) Client Systems NUC12WSKi7/NUC12WSBi7, BIOS WSADL357.0085.2022.0718.1739 07/18/2022
> > > > [   84.754474] RIP: 0010:ntfs_lookup+0x76/0xe0 [ntfs3]
> > >
> > > And do you get this same crash on ntfs3 on 6.4-rc1?  Is this a new
> > > regression, or does it also show up on 6.3.1?
> >
> > Tested with 6.3.1 during the day today. No errors, and had been
> > running 6.3.1 with no issue. Retested with 6.3.2-rc2 and problem
> > immediately evident. So yes - I believe a regression.
> >
> > I have built and am now testing 6.4.0-rc1 this evening - no errors so far.
> >
> > [    0.000000] Linux version 6.4.0-rc1 (docker@1ccd349e2545)
> > (x86_64-libreelec-linux-gnu-gcc-13.1.0 (GCC) 13.1.0, GNU ld (GNU
> > Binutils) 2.40) #1 SMP Wed May 10 07:51:37 UTC 2023
> >
> > > And ntfs, ick, why?  And .NET?  What a combination...
> >
> > Joys of media players. Test device gets to test exfat, ntfs3, .NET,
> > and throw in a compile host/GHA runner to put it through paces.
>
> Yeah, this should work.  Thanks for verifying this works on other
> releases.  Any chance you can do 'git bisect' to track down the
> offending commit?  In looking things over, I don't see anything
> obvious...

Hi Greg,

I can confirm the offending commit in 6.3.2-rc2 is

bf11fd528a97 fs/ntfs3: Fix null-ptr-deref on inode->i_op in ntfs_lookup()

Regards
Rudi

> thanks,
>
> greg k-h