Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt?

From	Melvin Vermeeren <vermeeren@vermwa.re>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt?
Date	2025-05-06 17:30 +0200
Message-ID	<KJsp3-1aqw-1@gated-at.bofh.it> (permalink)
References	<KHh4J-hmHh-5@gated-at.bofh.it> <KHi0N-hnio-1@gated-at.bofh.it> <KHh4J-hmHh-5@gated-at.bofh.it> <KHi0N-hnio-1@gated-at.bofh.it>
Organization	vermware

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Hi Salvatore,

I had been unexpectedly busy the past week, caught up to all the mails just 
now. Many thanks to everyone involved and the additional information from 
several people, am happy to see it.

On Wednesday, 30 April 2025 17:55:20 Central European Summer Time Salvatore 
Bonaccorso wrote:
> Melvin, the same change went as well in other stable series, 6.6.88,
> 6.12.25, 6.14.4, can you test e.g. 6.12.25-1 in Debian as well from
> unstable to see if the regression is there as well?

Specifically for this, I did just now test this with Debian testing's 
6.12.25-1, albeit on amd64 instead of ppc64le, with an identical storage 
layout and can confirm the issue does *not* exist there.

This confirms what others already discovered by now, I agree with the findings 
and have nothing to add specifically.

Thanks again to all,

-- 
Melvin Vermeeren
Systems engineer

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Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Salvatore Bonaccorso <carnil@debian.org> - 2025-04-30 18:00 +0200
  Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Moritz Mühlenhoff <jmm@inutil.org> - 2025-05-05 14:00 +0200
    Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Salvatore Bonaccorso <carnil@debian.org> - 2025-05-05 18:10 +0200
      Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Antoine Beaupré <anarcat@debian.org> - 2025-05-05 21:00 +0200
        Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Salvatore Bonaccorso <carnil@debian.org> - 2025-05-05 22:40 +0200
          Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Antoine Beaupré <anarcat@debian.org> - 2025-05-05 23:10 +0200
            Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking Yu Kuai <yukuai1@huaweicloud.com> - 2025-05-06 03:40 +0200
              Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking Salvatore Bonaccorso <carnil@debian.org> - 2025-05-06 08:10 +0200
                Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking Antoine Beaupré <anarcat@debian.org> - 2025-05-06 15:20 +0200
    Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Moritz Mühlenhoff <jmm@inutil.org> - 2025-05-05 19:50 +0200
  Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking Yu Kuai <yukuai1@huaweicloud.com> - 2025-05-06 03:30 +0200
  Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking Yu Kuai <yukuai1@huaweicloud.com> - 2025-05-06 03:40 +0200
  Bug#1104460: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Melvin Vermeeren <vermeeren@vermwa.re> - 2025-05-06 17:30 +0200

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