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While running an Ubuntu kernel (not a mainline or third-party kernel)
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apport-collect 1876990
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: focal
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https://bugs.launchpad.net/bugs/1876990
Title:
zfs modules in Focal kernel taint kernel
Status in linux package in Ubuntu:
Incomplete
Bug description:
the ZFS modules in the shipping focal kernel do not contain the intree
flag, and because of that I believe they are the cause of kernel
tainting discovered during 20.04 certification testing.
The output from a recent certification test run for 20.04:
Kernel taint value is 4097
Taint bit value: 0 (proprietary module was loaded)
Taint bit value: 12 (externally-built ('out-of-tree') module was loaded)
Looking into modinfo for everything loaded at the time, it appears
that the ZFS modules are loaded (even though we did not configure any
ZFS filesystems), and that seems to be the root cause of the test
failure. To test this, I checked /proc/sys/kernel/tainted and
verified it was tainted. I then blacklisted all the ZFS related
modules and rebooted, and then checked /proc/sys/kernel/tainted again
and the kernel no longer shows as being tainted.
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