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]

Am Wed, Apr 30, 2025 at 05:55:20PM +0200 schrieb Salvatore Bonaccorso:
> Hi
> 
> We got a regression report in Debian after the update from 6.1.133 to
> 6.1.135. Melvin is reporting that discard/trimm trhough a RAID10 array
> stalls idefintively. The full report is inlined below and originates
> from https://bugs.debian.org/1104460 .

JFTR, we ran into the same problem with a few Wikimedia servers running
6.1.135 and RAID 10: The servers started to lock up once fstrim.service
got started. Full oops messages are available at
https://phabricator.wikimedia.org/P75746

Cheers,
        Moritz