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authorKangjie Lu <kangjielu@gmail.com>2016-05-08 12:10:14 -0400
committerDavid S. Miller <davem@davemloft.net>2016-05-09 22:45:33 -0400
commit79e48650320e6fba48369fccf13fd045315b19b8 (patch)
treee1e18aca10b03bde03c48990c7669c90219a209c
parent7fa816b92c52e2c304f2ff6401e0d51e1d229ca5 (diff)
downloadlinux-79e48650320e6fba48369fccf13fd045315b19b8.tar.gz
net: fix a kernel infoleak in x25 module
Stack object "dte_facilities" is allocated in x25_rx_call_request(), which is supposed to be initialized in x25_negotiate_facilities. However, 5 fields (8 bytes in total) are not initialized. This object is then copied to userland via copy_to_user, thus infoleak occurs. Signed-off-by: Kangjie Lu <kjlu@gatech.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/x25/x25_facilities.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/x25/x25_facilities.c b/net/x25/x25_facilities.c
index 7ecd04c21360..997ff7b2509b 100644
--- a/net/x25/x25_facilities.c
+++ b/net/x25/x25_facilities.c
@@ -277,6 +277,7 @@ int x25_negotiate_facilities(struct sk_buff *skb, struct sock *sk,
memset(&theirs, 0, sizeof(theirs));
memcpy(new, ours, sizeof(*new));
+ memset(dte, 0, sizeof(*dte));
len = x25_parse_facilities(skb, &theirs, dte, &x25->vc_facil_mask);
if (len < 0)