[NETNS]: Minor information leak via /proc/net/ptype file.
This file displays the registered packet types, but some of them
(packet sockets creates such) can be bound to a net device and showing
them in a wrong namespace is not correct.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index f973e38..aebd086 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2615,7 +2615,7 @@
if (v == SEQ_START_TOKEN)
seq_puts(seq, "Type Device Function\n");
- else {
+ else if (pt->dev == NULL || pt->dev->nd_net == seq_file_net(seq)) {
if (pt->type == htons(ETH_P_ALL))
seq_puts(seq, "ALL ");
else
@@ -2639,7 +2639,8 @@
static int ptype_seq_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &ptype_seq_ops);
+ return seq_open_net(inode, file, &ptype_seq_ops,
+ sizeof(struct seq_net_private));
}
static const struct file_operations ptype_seq_fops = {
@@ -2647,7 +2648,7 @@
.open = ptype_seq_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = seq_release,
+ .release = seq_release_net,
};