http://defect.opensolaris.org/bz/show_bug.cgi?id=1055
Summary: zpool destroy on a pool has an encrypted dataset
(keyscope=pool) causes panic
Classification: Development
Product: zfs-crypto
Version: unspecified
Platform: Other
OS/Version: Solaris
Status: NEW
Severity: critical
Priority: P1
Component: other
AssignedTo: darrenm at opensolaris.org
ReportedBy: hua.tang at sun.com
QAContact: hua.tang at sun.com
CC: zfs-crypto-discuss at opensolaris.org
Estimated Hours: 0.0
panic[cpu2]/thread=ffffff021522b760: assertion failed: key->zk_refcnt == 0 (0x1
== 0x0), file: ../../common/fs/zfs/zio_crypt.c, line: 81
ffffff0005795ab0 genunix:assfail3+b9 ()
ffffff0005795ae0 zfs:zio_crypt_key_free+a1 ()
ffffff0005795b30 zfs:spa_keystore_fini+c4 ()
ffffff0005795b70 zfs:spa_unload+60 ()
ffffff0005795bd0 zfs:spa_export_common+1ba ()
ffffff0005795bf0 zfs:spa_destroy+19 ()
ffffff0005795c20 zfs:zfs_ioc_pool_destroy+1e ()
ffffff0005795ca0 zfs:zfsdev_ioctl+162 ()
ffffff0005795ce0 genunix:cdev_ioctl+48 ()
ffffff0005795d20 specfs:spec_ioctl+86 ()
ffffff0005795da0 genunix:fop_ioctl+7b ()
ffffff0005795eb0 genunix:ioctl+174 ()
ffffff0005795f00 unix:brand_sys_syscall32+292 ()
I have seen this panic several times. But I couldn't located the root cause
because after this panic the test machine couldn't be recovered.
>From the test journal file, I suspects the panic is caused by 'zpool destroy'
on a pool who has an encrypted dataset with keyscope=pool.
My test machine couldn't be boot. It hanged.
[1;1SunOS Release 5.11 Version zfs-crypto-gate 64-bit
Copyright 1983-2008 Sun Microsystems, Inc. All rights reserved.
Use is subject to license terms.
DEBUG enabled
I booted up from failsafe. The pool created in my test case was already
destroyed.
# zpool import -d /a/var/tmp/zfs-crypto
no pools available to import
But there was /a/etc/zfs/zpool.cache.
# ls /a/etc/zfs
zpool.cache
After deleting zpool.cache, the test machine wasn't booted up. Still hanged.
This panic affected the testing very seriously because each test case should
destroy the pool and the test machine couldn't be recover.
Is there any workarounds?
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