diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-06-06 22:42:06 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-07-13 05:31:27 +0200 |
| commit | 26d3cbdece9463926d553dbeed3df10af22bb161 (patch) | |
| tree | a540c36f5d9c1fb133fb5ff73fa5c26bb38dad88 /net | |
| parent | 5952a72b61eee5675ef9f878fda98e5719ee4f35 (diff) | |
af_packet: prevent information leak
[ Upstream commit 13fcb7bd322164c67926ffe272846d4860196dc6 ]
In 2.6.27, commit 393e52e33c6c2 (packet: deliver VLAN TCI to userspace)
added a small information leak.
Add padding field and make sure its zeroed before copy to user.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net')
| -rw-r--r-- | net/packet/af_packet.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 24084ffe6609..39d85a933109 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -759,6 +759,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, h.h2->tp_sec = ts.tv_sec; h.h2->tp_nsec = ts.tv_nsec; h.h2->tp_vlan_tci = vlan_tx_tag_get(skb); + h.h2->tp_padding = 0; hdrlen = sizeof(*h.h2); break; default: @@ -1495,6 +1496,7 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock, aux.tp_net = skb_network_offset(skb); aux.tp_vlan_tci = vlan_tx_tag_get(skb); + aux.tp_padding = 0; put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux); } |