Hi, I would assume that you don't monitor the bug as you didn't answer the questions on irc. So here the part of the IRC communication which needs comments/answers from your side. dbeberman-away: hmm, weird. could be a batman specific bug. the first thing I'd have in mind to narrow things down would be to try changing that line: http://git.open-mesh.org/?p=batman- adv.git;a=blob;f=send.c;h=33779278f1b2bfe49155bb9dfadc421305c0c8d7;hb=refs/heads/master#l485 from skb_clone to skb_copy from looking at the kernel code it seems like skb_clone() is only copying the skb-header, but not the skb-headroom (which we are modifying in send_skb_packet() ) --> jn_ (~jonathan@dslb-084-060-236-250.pools.arcor-ip.net) has joined #batman T_X: and that is a problem.... why? i don't see which crc is the problem ecsv_: you mean it should not be a problem because we for clones we are writing the exact same data in the headroom again? we should... but yes, it might be a good idea to implement it differently and to test it with skb_copy it didn't checked the bug report... just assumed that you guessed :) but still don't see what happened to which crc we only modify stuff which is related to us.... and not to the encapsulated data but maybe he meant the ethernet header/wifi stuff before the batman-adv header but why does he see them? and why are udp broadcasts fragmented? we should only have fragmentation for unicast ecsv_: I think he's talking about the wifi fragmentation not the fragmentation in batman dbeberman-away: and the only reason why we reject mails on the list is either that you are a known spammer or that you try to send html mails did you get a reply? and I suppose he's doing the sniffing on another interface in monitor mode ah, and missed that the "my_skb_head_push()" is in fact making the headroom of the (cloned) skb writeable Kind regards, Sven