Bug ID: 225877
           Summary: panic: solaris assert: newds == os->os_dsl_dataset
                    during "zpool upgrade"
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern

The following panic is generated by zpool_upgrade_007_pos from the ZFS test

panic: solaris assert: newds == os->os_dsl_dataset (0xfffff80045f4c000 ==
0xfffff80021ab4800), file:
line: 677
cpuid = 10
time = 1518552986
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00c24953a0
vpanic() at vpanic+0x18d/frame 0xfffffe00c2495400
panic() at panic+0x43/frame 0xfffffe00c2495460
assfail3() at assfail3+0x2c/frame 0xfffffe00c2495480
dmu_objset_refresh_ownership() at dmu_objset_refresh_ownership+0x161/frame
zfs_ioc_userspace_upgrade() at zfs_ioc_userspace_upgrade+0x97/frame
zfs_prop_set_special() at zfs_prop_set_special+0x465/frame 0xfffffe00c2495670
zfs_set_prop_nvlist() at zfs_set_prop_nvlist+0x23f/frame 0xfffffe00c24956f0
zfs_ioc_set_prop() at zfs_ioc_set_prop+0x129/frame 0xfffffe00c2495740
zfsdev_ioctl() at zfsdev_ioctl+0x76b/frame 0xfffffe00c24957e0
devfs_ioctl() at devfs_ioctl+0xcb/frame 0xfffffe00c2495830
VOP_IOCTL_APV() at VOP_IOCTL_APV+0xd9/frame 0xfffffe00c2495860
vn_ioctl() at vn_ioctl+0x124/frame 0xfffffe00c2495970
devfs_ioctl_f() at devfs_ioctl_f+0x1f/frame 0xfffffe00c2495990
kern_ioctl() at kern_ioctl+0x2b9/frame 0xfffffe00c24959f0
sys_ioctl() at sys_ioctl+0x15c/frame 0xfffffe00c2495ac0
amd64_syscall() at amd64_syscall+0x79b/frame 0xfffffe00c2495bf0
fast_syscall_common() at fast_syscall_common+0xfc/frame 0x7fffffff8880

I saw this on 12.0-CURRENT amd64, at 328401.  Steps to reproduce:
$ svn co
$ cd head
$ mtree -deU -f etc/mtree/BSD.tests.dist
$ cd tests/sys/cddl
$ make && sudo make install
$ # Now write kyua.conf.  Modify as appropriate for your system
$ echo >> /usr/local/etc/kyua/kyua.conf <HERE
-- $FreeBSD$
-- System-wide configuration file for kyua(1).  See kyua.conf(5) for details
-- on the syntax.


-- User to drop privileges to when invoking kyua(1) as root and a test case
-- requests to be run with non-root permissions.
unprivileged_user = 'tests'

-- An example to set a configuration property specific to FreeBSD.
test_suites.FreeBSD.disks="/dev/da1 /dev/da2 /dev/da3 /dev/da4 /dev/da5
test_suites.FreeBSD.keep_pools="zroot tank"

$ cd /usr/tests/sys/cddl/zfs/tests/cli_root/zpool_upgrade
$ sudo kyua debug zpool_upgrade_test:zpool_upgrade_007_pos

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