I was unable to report a zfs bug, incorrect confirmation code

[Christian Nygaard]

Your Electronic Mail Address:
christiannygaard at gmail.com

Your Name:
Christian Nygaard

One line summary of the problem:
zfs removing a zfs storage file causes kernel panic

category:
amd64

Which FreeBSD Release You Are Using:
8.0

Environment (output of "uname -a" on the problem machine):
FreeBSD freebsd 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21 15:02:08 UTC 2009
               root at mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64

Full Description:
Creating a zfs test pool on file based, then removing one of the
underlying files
and doing a zpool scrub causes kernel panic.

How to repeat the problem:
To reproduce create two files, then zpool tank pool on files
# dd if=test1 count=100k bs=1k
# dd if=test2 count=100k bs=1k
# zpool create tank mirror /root/test1 /root/test2

now remove file /root/test2, this causes a kernel panic
# rm /root/test2
# zpool scrub tank

Kernel Panic

    Fatal trap 12: page fault while in kernel mode
          cpuid = 1; apic id = 01
          fault virtual address   = 0x0
          fault code              = supervisor read data, page not present
          instruction pointer     = 0x20:0xffffffff810735bd
          stack pointer           = 0x28:0xffffff803e778800
          frame pointer           = 0x28:0xffffff803e7788c0
          code segment            = base 0x0, limit 0xfffff, type 0x1b
                                  = DPL 0, pres 1, long 1, def32 0, gran 1
          processor eflags        = interrupt enabled, resume, IOPL = 0
          current process         = 36 (txg_thread_enter)
          trap number             = 12
          panic: page fault
          cpuid = 1
          Uptime: 3m31s
          Cannot dump. Device not defined or unavailable.
          Automatic reboot in 15 seconds - press a key on the console to abort