[Bug 261707] panic: vm_page_free_prep: freeing mapped page 0xfffffe0006f80170 on 14-Current(master-n252892-e30fceb89b7)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261707

            Bug ID: 261707
           Summary: panic: vm_page_free_prep: freeing mapped page
                    0xfffffe0006f80170 on
                    14-Current(master-n252892-e30fceb89b7)
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: ish@amail.plala.or.jp

Created attachment 231549
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=231549&action=edit
core.txt.6

# cat info.last
Dump header from device: /dev/gpt/fbswap
  Architecture: amd64
  Architecture Version: 2
  Dump Length: 972505088
  Blocksize: 512
  Compression: none
  Dumptime: 2022-02-04 12:06:41 +0900
  Hostname: carrot.ish.org
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 14.0-CURRENT #21 master-n252892-e30fceb89b7-dirty:
Thu Feb  3 17:45:25 JST 2022
    ishizuka@okra.ish.org:/usr/obj/usr/src/amd64.amd64/sys/SG_UDF2
  Panic String: vm_page_free_prep: freeing mapped page 0xfffffe0006f80170
  Dump Parity: 1337301631
  Bounds: 6
  Dump Status: good

mvcore was saved to https://www.ish.org/files/vmcore-n252892.6.xz .

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