Commit 3ec6a22d authored by Kangjie Lu's avatar Kangjie Lu Committed by Ben Hutchings

net: fix infoleak in llc

commit b8670c09 upstream.

The stack object “info” has a total size of 12 bytes. Its last byte
is padding which is not initialized and leaked via “put_cmsg”.
Signed-off-by: default avatarKangjie Lu <kjlu@gatech.edu>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 9f9aa476
......@@ -627,6 +627,7 @@ static void llc_cmsg_rcv(struct msghdr *msg, struct sk_buff *skb)
if (llc->cmsg_flags & LLC_CMSG_PKTINFO) {
struct llc_pktinfo info;
memset(&info, 0, sizeof(info));
info.lpi_ifindex = llc_sk(skb->sk)->dev->ifindex;
llc_pdu_decode_dsap(skb, &info.lpi_sap);
llc_pdu_decode_da(skb, info.lpi_mac);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment