summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorMathias Krause <minipli@googlemail.com>2012-08-15 11:31:56 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-02 10:29:37 -0700
commit62b4d90b525c6c11e467a2eadb12fcf64a6f0829 (patch)
tree1a7f38e53fbca60b6651a295a8063b714947157d /net
parent59039dc90bb7879bd4c8c959109d27131f0ce40f (diff)
ipvs: fix info leak in getsockopt(IP_VS_SO_GET_TIMEOUT)
[ Upstream commit 2d8a041b7bfe1097af21441cb77d6af95f4f4680 ] If at least one of CONFIG_IP_VS_PROTO_TCP or CONFIG_IP_VS_PROTO_UDP is not set, __ip_vs_get_timeouts() does not fully initialize the structure that gets copied to userland and that for leaks up to 12 bytes of kernel stack. Add an explicit memset(0) before passing the structure to __ip_vs_get_timeouts() to avoid the info leak. Signed-off-by: Mathias Krause <minipli@googlemail.com> Cc: Wensong Zhang <wensong@linux-vs.org> Cc: Simon Horman <horms@verge.net.au> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/ipvs/ip_vs_ctl.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index f5589987fc80..97e73806bacc 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -2713,6 +2713,7 @@ do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
{
struct ip_vs_timeout_user t;
+ memset(&t, 0, sizeof(t));
__ip_vs_get_timeouts(net, &t);
if (copy_to_user(user, &t, sizeof(t)) != 0)
ret = -EFAULT;