linux-stable/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
..
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
Kconfig
llc_c_ac.c
llc_c_ev.c
llc_c_st.c llc: Make llc_conn_ev_qfyr_t function pointer arrays const 2014-12-10 15:21:24 -05:00
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 net: llc: include linux/errno.h instead of asm/errno.h 2014-10-24 15:51:42 -04:00
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: Make llc_sap_action_t function pointer arrays const 2014-12-10 15:21:24 -05:00
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
Makefile
sysctl_net_llc.c net: llc: use correct size for sysctl timeout entries 2015-01-25 00:23:21 -08:00