On Wed, 16 Oct 2002, Terry Lambert wrote:
> Frank C Pilarcik wrote:
> > To whom it may concern,
> >
> > We have been experiencing intermittent system panics on system intended to
> > handle email and web mail. Neither system load or traffic volume seems to
> > have a bearing on when the panics occur.
> >
> > Any insight into our issue would be greatly appreciated.
> >
> > I have attached the debugger output (panic1.txt).
>
> This is a double panic.
>
> Please do the following:
>
> sysctl kern.sync_on_panic=0
>
> And recreate the traceback, so as to not mask the first panic with
> a second panic.
>
> -- Terry
Additionally, the line that your gdb claims generated the trap was
ip_input.c:759 which is the ip_freef(fp) line.
------------------
#endif
} else
if (fp)
759 :::::: ip_freef(fp);
} else
ip->ip_len -= hlen;
------------------
It seems that it may be possible for fp to be garbage (uninitialized) and
thus this would trigger a fault. Note this is fixed in 4.7-RELEASE and
above by removing the dangling ip_freef() and depending on the interior
of the "if (mff)" case to free it instead. Upgrade to 4.7R and see if the
problem goes away.
-Nate
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