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Bug#891249: linux: unstable kernel/data corruption on ppc64el



Hi,
I got this as well, not immediatly though but adding some
parallelization to the build helped. I'll look into this as well.

F.

On Fri, 23 Feb 2018 19:52:35 +0100, Aurelien Jarno <aurel32@debian.org> wrote:
> Source: linux
> Version: 4.9.82-1+deb9u2
> Severity: critical
> Justification: causes serious data corruption
> 
> DSA has installed the latest security kernel (4.9.82-1+deb9u2) on the
> Debian POWER8 machines running ppc64el. While they boot correctly, then
> programs segfault randomly (apt, sbuild, systemd, etc...). Passing
> no_rfi_flush to the command line does not change anything. Looking more
> in details, things looks scarying as some code actually get wrongly
> executed. Here are some build logs examples:
> - https://buildd.debian.org/status/fetch.php?pkg=python-msgpack&arch=ppc64el&ver=0.5.1-1&stamp=1519399908&raw=0
> - https://buildd.debian.org/status/fetch.php?pkg=python-msgpack&arch=ppc64el&ver=0.5.1-1&stamp=1519396907&raw=0
> - https://buildd.debian.org/status/fetch.php?pkg=tk8.5&arch=ppc64el&ver=8.5.19-3&stamp=1519362938&raw=0
> 
> While in the above case the packages fail to build from source, I guess
> there are also some cases of undetected corruptions.
> 
> I'll try to run the 4.9.80-2 kernel at some point to narrow down the
> issue.
> 
> 

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