Date: Fri, 22 Oct 2004 00:17:29 +0100 From: Juan Rodriguez <juan.fco.rodriguez@gmail.com> To: freebsd-net@freebsd.org Subject: if_ed.c "NIC memory corrupt - invalid packet length" error Message-ID: <96b30c400410211617466e7ea9@mail.gmail.com>
next in thread | raw e-mail | index | archive | help
Hello,
I'm getting this error now and then, so I've tried to look at the
file "if_ed.c" where the message is printed to sort it out...
I'd be glad if somebody could tell me what's the reason of this line
inside "ed_rint()" function:
/*
* because buffers are aligned on 256-byte boundary,
* the length computed above is off by 256 in almost
* all cases. Fix it...
*/
if (len & 0xff)
len -= 256 ;
I wonder what can happen here if we've got a length value
that is less than 256. We could end up with a negative value...
could it be this the source that causes the problem ?
PS: I'm kinda newbie so I might be saying stupid things! :)
Thanks
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?96b30c400410211617466e7ea9>