[Bug 272416] Seldom crash happening with RTL8125

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272416

--- Comment #7 from Tino Engel <tino.engel@mail.de> ---
I had the same problem about a year ago - unfortunately I have forgotten what
workaround I used.
Anyhow when I look at the source of
/usr/ports/net/realtek-re-kmod/work/rtl_bsd_drv-d3a7a3d/if_re.c where the
problem seems to happen:

  7103  #if OS_VER < VERSION(4,9)
  7104                  /* Remove header from mbuf and pass it on. */
  7105                  m_adj(m, sizeof(struct ether_header));
  7106                  ether_input(ifp, eh, m);
  7107  #else
  7108                  (*ifp->if_input)(ifp, m);
  7109  #endif
  7110                  RE_LOCK(sc);

From the crash dump stacks, it seems to end up in line 7106, which is between 
#if OS_VER < VERSION(4,9)
and
#else

see also Comment #4:
#8  ether_input (ifp=<optimized out>, m=0xffff)
    at /usr/src/sys/net/if_ethersubr.c:849

That seems wrong to me for FreeBSD 13. See if_rereg.h:
#define OS_VER  __FreeBSD_version

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