mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-28 22:54:05 +08:00
ip6_gre: add validation for csum_start
Validate csum_start in gre_handle_offloads before we call _gre_xmit so
that we do not crash later when the csum_start value is used in the
lco_csum function call.
This patch deals with ipv6 code.
Fixes: Fixes: b05229f442
("gre6: Cleanup GREv6 transmit path, call common
GRE functions")
Reported-by: syzbot+ff8e1b9f2f36481e2efc@syzkaller.appspotmail.com
Signed-off-by: Shreyansh Chouhan <chouhan.shreyansh630@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
1d011c4803
commit
9cf448c200
@ -629,6 +629,8 @@ drop:
|
||||
|
||||
static int gre_handle_offloads(struct sk_buff *skb, bool csum)
|
||||
{
|
||||
if (csum && skb_checksum_start(skb) < skb->data)
|
||||
return -EINVAL;
|
||||
return iptunnel_handle_offloads(skb,
|
||||
csum ? SKB_GSO_GRE_CSUM : SKB_GSO_GRE);
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user