https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275870
Bug ID: 275870
Summary: [unionfs] [zfs] kernel panic on umount
Product: Base System
Version: 14.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
If you do a ZFS rollback which removes a unionfs mountpoint and umount
mountpoint after that, 14.0 kernel will panic.
In 13.0 it works fine - it is unmounted even though the directory was rolled
back.
I provide a small script that reproduces the problem:
#!/bin/sh
zfs create zroot/var/repro
zfs snapshot zroot/var/repro@clean
cd /var/repro
mkdir a b
mount_unionfs a b
zfs rollback zroot/var/repro@clean
umount /var/repro/b
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