xfrm: Refuse to insert 32 bit userspace socket policies on 64 bit systems
commit 19d7df69fd
upstream.
We don't have a compat layer for xfrm, so userspace and kernel
structures have different sizes in this case. This results in
a broken configuration, so refuse to configure socket policies
when trying to insert from 32 bit userspace as we do it already
with policies inserted via netlink.
Reported-and-tested-by: syzbot+e1a1577ca8bcb47b769a@syzkaller.appspotmail.com
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
parent
a6232ffa2a
commit
dffe655ddb
|
@ -2050,6 +2050,11 @@ int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen
|
|||
struct xfrm_mgr *km;
|
||||
struct xfrm_policy *pol = NULL;
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
if (in_compat_syscall())
|
||||
return -EOPNOTSUPP;
|
||||
#endif
|
||||
|
||||
if (!optval && !optlen) {
|
||||
xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
|
||||
xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
|
||||
|
|
Loading…
Reference in New Issue