Messages in this thread | | | Date | Mon, 26 Mar 2001 10:09:41 +0400 | From | Oleg Drokin <> | Subject | Re: IP layer bug? |
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Hello!
On Mon, Mar 26, 2001 at 04:06:19PM +0530, Manoj Sontakke wrote: > > 2.4.x kernel. have not tried 2.2 > > I just found somethig, I believe is kernel bug. > > I am working with usbnet.c driver, which stores some of its > > internal state in sk_buff.cb area. But once such skb passed to > > upper layer with netif_rx, net/ipv4/ip_input.c reuses content of cb > > (line #345), > ip_options_compile() when called with first argument NULL resets cb to 0. I have found that already.
> This is probably because the cb is supposed to be used IP and above. The Sure.
> underlying layer(link and phy) could be anything so where from the > ip_options should start will depend upon the underlying layer. But here's the problem! If I won't zero cb in my driver before netif_rx() call, IP layer thinks that all my packets have various ip options set (source routing most notable)
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