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authorMathias Krause <minipli@googlemail.com>2017-08-26 17:08:57 +0200
committerSteffen Klassert <steffen.klassert@secunet.com>2017-08-28 10:58:02 +0200
commit5fe0d4bd8f86d19f7f24c1ae5a9b6e6a5a52e51a (patch)
treea09063c857fe5f1ad3fb5f2e6cdf7f64f6f6df95 /net/xfrm
parent54ffd790792898f05e215dce5aa593473e80e92f (diff)
downloadlinux-5fe0d4bd8f86d19f7f24c1ae5a9b6e6a5a52e51a.tar.bz2
xfrm_user: fix info leak in copy_user_offload()
The memory reserved to dump the xfrm offload state includes padding bytes of struct xfrm_user_offload added by the compiler for alignment. Add an explicit memset(0) before filling the buffer to avoid the heap info leak. Cc: Steffen Klassert <steffen.klassert@secunet.com> Fixes: d77e38e612a0 ("xfrm: Add an IPsec hardware offloading API") Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_user.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 2be4c6af008a..3259555ae7d7 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -796,7 +796,7 @@ static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb
return -EMSGSIZE;
xuo = nla_data(attr);
-
+ memset(xuo, 0, sizeof(*xuo));
xuo->ifindex = xso->dev->ifindex;
xuo->flags = xso->flags;