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| author | Mathias Krause <minipli@googlemail.com> | 2012-09-19 11:33:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-09-20 18:08:39 -0400 |
| commit | f778a636713a435d3a922c60b1622a91136560c1 (patch) | |
| tree | b50f9ec1a33555491dc9874a93a0404406c4f6cc /net/xfrm/xfrm_user.c | |
| parent | 4c87308bdea31a7b4828a51f6156e6f721a1fcc9 (diff) | |
| download | linux-3.10-f778a636713a435d3a922c60b1622a91136560c1.tar.gz linux-3.10-f778a636713a435d3a922c60b1622a91136560c1.tar.bz2 linux-3.10-f778a636713a435d3a922c60b1622a91136560c1.zip | |
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/xfrm_user.c')
| -rw-r--r-- | net/xfrm/xfrm_user.c | 1 |
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)); |