| From | Greg Kroah-Hartman <> | Subject | [ 028/120] xfrm_user: fix info leak in copy_to_user_state() | Date | Thu, 11 Oct 2012 09:59:40 +0900 |
| |
3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mathias Krause <minipli@googlemail.com>
[ Upstream commit f778a636713a435d3a922c60b1622a91136560c1 ]
The memory reserved to dump the xfrm state includes the padding bytes of struct xfrm_usersa_info added by the compiler for alignment (7 for amd64, 3 for i386). Add an explicit memset(0) before filling the buffer to avoid the info leak.
Signed-off-by: Mathias Krause <minipli@googlemail.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- net/xfrm/xfrm_user.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -689,6 +689,7 @@ out: static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) { + memset(p, 0, sizeof(*p)); memcpy(&p->id, &x->id, sizeof(p->id)); memcpy(&p->sel, &x->sel, sizeof(p->sel)); memcpy(&p->lft, &x->lft, sizeof(p->lft));
|