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https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
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97b1d320f4
We will remove this restriction in llc_rcv() in the following patch,
which means that the protocol handler must be aware of netns.
if (!net_eq(dev_net(dev), &init_net))
goto drop;
llc_rcv() fetches llc_type_handlers[llc_pdu_type(skb) - 1] and calls it
if not NULL.
If the PDU type is LLC_DEST_CONN, llc_conn_handler() is called to pass
skb to corresponding sockets. Then, we must look up a proper socket in
the same netns with skb->dev.
llc_conn_handler() calls __llc_lookup() to look up a established or
litening socket by __llc_lookup_established() and llc_lookup_listener().
Both functions iterate on a list and call llc_estab_match() or
llc_listener_match() to check if the socket is the correct destination.
However, these functions do not check netns.
Also, bind() and connect() call llc_establish_connection(), which
finally calls __llc_lookup_established(), to check if there is a
conflicting socket.
Let's test netns in llc_estab_match() and llc_listener_match().
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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|---|---|---|
| .. | ||
| af_llc.c | ||
| Kconfig | ||
| llc_c_ac.c | ||
| llc_c_ev.c | ||
| llc_c_st.c | ||
| llc_conn.c | ||
| llc_core.c | ||
| llc_if.c | ||
| llc_input.c | ||
| llc_output.c | ||
| llc_pdu.c | ||
| llc_proc.c | ||
| llc_s_ac.c | ||
| llc_s_ev.c | ||
| llc_s_st.c | ||
| llc_sap.c | ||
| llc_station.c | ||
| Makefile | ||
| sysctl_net_llc.c | ||