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authorMathias Krause <minipli@googlemail.com>2012-09-19 11:33:39 +0000
committerDavid S. Miller <davem@davemloft.net>2012-09-20 18:08:39 -0400
commitf778a636713a435d3a922c60b1622a91136560c1 (patch)
treeb50f9ec1a33555491dc9874a93a0404406c4f6cc /net/xfrm
parent4c87308bdea31a7b4828a51f6156e6f721a1fcc9 (diff)
downloadvexpress-lsk-f778a636713a435d3a922c60b1622a91136560c1.tar.gz
xfrm_user: fix info leak in copy_to_user_state()
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>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_user.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 40dd50d6c4c..d585459dc8b 100644
--- 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));