Re: [B.A.T.M.A.N.] [PATCHv4 maint] batman-adv: fix potential kernel paging error for unicast transmissions

On Monday 20 January 2014 16:07:53 Antonio Quartulli wrote:

On 20/01/14 11:06, Linus Lüssing wrote:

...

batadv_send_skb_prepare_unicast(_4addr) might reallocate the skb's data. If it does then our ethhdr pointer is not valid anymore in batadv_send_skb_unicast(), resulting in a kernel paging error.

Fixing this by refetching the ethhdr pointer after the potential reallocation.

Introduced by b46c60b9e1ee7a1909c542413a85875a750955d6 ("batman-adv: improve unicast packet (re)routing")

Signed-off-by: Linus Lüssing linus.luessing@web.de

Acked-by: Antonio Quartulli antonio@meshcoding.com

Applied in revision 41b3872.

Thanks, Marek