Bug ID: 214981
Summary: POLA violation: ZFS happily and silently remounts any
existing mount on pool import
Product: Base System
Severity: Affects Some People
When importing a pool with mountable datasets, they will always be mounted on
their mountpoints even if those points are already mounted elsewhere. This
includes even root (/).
Of course, unless you zpool import with, say, -R /mnt or -N.
However, the default is a huge violation of POLA, not to mention a huge
security issue. ZFS on Linux, btw, will not remount existing mounts, will error
out and complain.
I believe the defaults should be safe, non-destructive, non-astonishing, which
is not the case here.
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