esp: Fix possible buffer overflow in ESP transformation
The maximum message size that can be send is bigger than the maximum site that skb_page_frag_refill can allocate. So it is possible to write beyond the allocated buffer. Fix this by doing a fallback to COW in that case. v2: Avoid get get_order() costs as suggested by Linus Torvalds. Fixes: cac2661c ("esp4: Avoid skb_cow_data whenever possible") Fixes: 03e2a30f ("esp6: Avoid skb_cow_data whenever possible") Reported-by:valis <sec@valis.email> Signed-off-by:
Steffen Klassert <steffen.klassert@secunet.com>
parent
a3d9001b