[Bug 207619] ZFS range_tree_remove() assert causes kernel panic

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207619

            Bug ID: 207619
           Summary: ZFS range_tree_remove() assert causes kernel panic
           Product: Base System
           Version: 10.2-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: freebsd at get-experience.com

I am getting following panic when importing a ZFS pool:

> ZFS filesystem version: 5
> ZFS storage pool version: features support (5000)
> panic: solaris assert: rs->rs_end >= end (0x232a98d9000 >= 0x232a9c16000), file: /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/range_tree.c, line: 262
> cpuid = 7
> KDB: stack backtrace:
> #0 0xffffffff80984e30 at kdb_backtrace+0x60
> #1 0xffffffff809489e6 at vpanic+0x126
> #2 0xffffffff809488b3 at panic+0x43
> #3 0xffffffff81c0a22f at assfail3+0x2f
> #4 0xffffffff81a76bed at range_tree_remove+0xfd
> #5 0xffffffff81a8d7b5 at space_map_load+0x375
> #6 0xffffffff81a7341e at metaslab_load+0x2e
> #7 0xffffffff81a75007 at metaslab_alloc+0x777
> #8 0xffffffff81ab53d6 at zio_dva_allocate+0x76
> #9 0xffffffff81ab27a2 at zio_execute+0x162
> #10 0xffffffff80993405 at taskqueue_run_locked+0xe5
> #11 0xffffffff80993e98 at taskqueue_thread_loop+0xa8
> #12 0xffffffff8091244a at fork_exit+0x9a
> #13 0xffffffff80d30d2e at fork_trampoline+0xe

I also tried to import it on an Arch Linux system to get to my data, but if
fails there as well. For what it's worth, you can find the corresponding
zfsonlinux ticket here: https://github.com/zfsonlinux/zfs/issues/4374 .

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