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