https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225960
Bug ID: 225960
Summary: zfs: g_access leak when unmounting UFS on a zvol
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: asom...@freebsd.org
Sometimes a g_access leak can be triggered by creating a UFS filesystem on a
zvol, and then unmounting it. The result is a zvol whose geom mode is r0w0e2,
even though it has no consumers. The zvol cannot be destroyed, and neither can
its parent pool. Rebooting solves the problem. While not 100% reproducible,
this problem is frequently reproduced by the
sys/cddl/zfs/tests/cli_root/zfs_copies/zfs_copies_test:zfs_copies_001_pos test
from the ZFS test suite.
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