]> git.proxmox.com Git - mirror_ubuntu-disco-kernel.git/commit
xfrm_user: fix info leak in copy_to_user_tmpl()
authorMathias Krause <minipli@googlemail.com>
Wed, 19 Sep 2012 11:33:41 +0000 (11:33 +0000)
committerDavid S. Miller <davem@davemloft.net>
Thu, 20 Sep 2012 22:08:40 +0000 (18:08 -0400)
commit1f86840f897717f86d523a13e99a447e6a5d2fa5
tree03c775c5e0db9f885d7dd24fd7f4d8ebf0caf2eb
parent7b789836f434c87168eab067cfbed1ec4783dffd
xfrm_user: fix info leak in copy_to_user_tmpl()

The memory used for the template copy is a local stack variable. As
struct xfrm_user_tmpl contains multiple holes added by the compiler for
alignment, not initializing the memory will lead to leaking stack bytes
to userland. Add an explicit memset(0) to avoid the info leak.

Initial version of the patch by Brad Spengler.

Cc: Brad Spengler <spender@grsecurity.net>
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>
net/xfrm/xfrm_user.c