linux/net/llc
linzhang 0908cf4dfe net: llc: add lock_sock in llc_ui_bind to avoid a race condition
There is a race condition in llc_ui_bind if two or more processes/threads
try to bind a same socket.

If more processes/threads bind a same socket success that will lead to
two problems, one is this action is not what we expected, another is
will lead to kernel in unstable status or oops(in my simple test case,
cause llc2.ko can't unload).

The current code is test SOCK_ZAPPED bit to avoid a process to
bind a same socket twice but that is can't avoid more processes/threads
try to bind a same socket at the same time.

So, add lock_sock in llc_ui_bind like others, such as llc_ui_connect.

Signed-off-by: Lin Zhang <xiaolou4617@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-26 14:20:29 -04:00
..
Kconfig
Makefile
af_llc.c net: llc: add lock_sock in llc_ui_bind to avoid a race condition 2017-05-26 14:20:29 -04:00
llc_c_ac.c
llc_c_ev.c
llc_c_st.c
llc_conn.c mm: Rename SLAB_DESTROY_BY_RCU to SLAB_TYPESAFE_BY_RCU 2017-04-18 11:42:36 -07:00
llc_core.c
llc_if.c
llc_input.c
llc_output.c
llc_pdu.c
llc_proc.c sock: tigthen lockdep checks for sock_owned_by_user 2016-04-13 22:37:20 -04:00
llc_s_ac.c
llc_s_ev.c
llc_s_st.c
llc_sap.c mm: Rename SLAB_DESTROY_BY_RCU to SLAB_TYPESAFE_BY_RCU 2017-04-18 11:42:36 -07:00
llc_station.c
sysctl_net_llc.c