[Bug 256673] [panic] [usb] [if_ure] unplugging device causes panic roughly one in three times

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256673

            Bug ID: 256673
           Summary: [panic] [usb] [if_ure] unplugging device causes panic
                    roughly one in three times
           Product: Base System
           Version: 13.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: usb
          Assignee: usb@FreeBSD.org
          Reporter: knan-bfo@modirum.com

Created attachment 225893
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=225893&action=edit
crashinfo file

A quad ethernet usb device we picked up for expanding a small-footprint
firewall sometimes panics the system on unplug. RTL8153-based.

13.0-RELEASE-p1

Steps to reproduce:

Plug the device in, wait for things to settle, unplug. After three-four cycles
it usually panics.

panic: page fault
cpuid = 6
time = 1623939807
KDB: stack backtrace:
#0 0xffffffff80c57515 at kdb_backtrace+0x65
#1 0xffffffff80c09ef1 at vpanic+0x181
#2 0xffffffff80c09d63 at panic+0x43
#3 0xffffffff8108b1b7 at trap_fatal+0x387
#4 0xffffffff8108b20f at trap_pfault+0x4f
#5 0xffffffff8108a86d at trap+0x27d
#6 0xffffffff81061978 at calltrap+0x8
#7 0xffffffff80a2c5b9 at usbd_do_request_flags+0x899
#8 0xffffffff80a2c690 at usbd_do_request_proc+0x60
#9 0xffffffff843c12c0 at ure_miibus_readreg+0xc0
#10 0xffffffff8071e5b7 at rgephy_status+0x227
#11 0xffffffff8071e348 at rgephy_service+0x418
#12 0xffffffff8071a7f6 at mii_pollstat+0x56
#13 0xffffffff843c4084 at ure_ifmedia_sts+0x44
#14 0xffffffff80d27f8a at ifmedia_ioctl+0x16a
#15 0xffffffff80d1d45d at ifhwioctl+0x2bd
#16 0xffffffff80d1f4dc at ifioctl+0x50c
#17 0xffffffff80c76ebd at kern_ioctl+0x26d

Looks different from #252608.

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