Commit graph

4 commits

Author SHA1 Message Date
Jouni Malinen
b82fcf06f2 macsec_linux: Use NULL to clear a pointer
Avoid a sparse warning from use of a plain integer.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2018-11-30 17:32:35 +02:00
Michael Braun
73b3de01ce macsec_linux: Exit early when missing macsec kernel module
Using driver macsec_linux makes no sense without macsec kernel module
loaded.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
2017-09-10 22:26:36 +03:00
Davide Caratti
5db86df6a8 macsec_linux: Fix NULL pointer dereference on error cases
In case wpa_supplicant is using driver_macsec_linux, but macsec module
is not (yet) loaded in the kernel, nl_socket_alloc() fails and drv->sk
is NULL. In this case, don't call libnl functions rntl_link_add() or
rtnl_link_change() using such NULL pointer, to prevent program from
getting segmentation faults like:

 Program received signal SIGSEGV, Segmentation fault.
 nl_socket_get_local_port (sk=sk@entry=0x0) at socket.c:365
 365             if (sk->s_local.nl_pid == 0) {
 (gdb) p sk
 $1 = (const struct nl_sock *) 0x0
 (gdb) bt
 #0  nl_socket_get_local_port (sk=sk@entry=0x0) at socket.c:365
 #1  0x00007ffff79c56a0 in nl_complete_msg (sk=sk@entry=0x0,
  msg=msg@entry=0x55555595a1f0) at nl.c:491
 #2  0x00007ffff79c56d1 in nl_send_auto (sk=sk@entry=0x0,
  msg=msg@entry=0x55555595a1f0) at nl.c:522
 #3  0x00007ffff79c652f in nl_send_sync (sk=sk@entry=0x0,
  msg=0x55555595a1f0) at nl.c:556
 #4  0x00007ffff755faf5 in rtnl_link_add (sk=0x0,
  link=link@entry=0x55555595b0f0, flags=flags@entry=1024) at route/link.c:1548
 #5  0x000055555567a298 in macsec_drv_create_transmit_sc (priv=0x55555593b130,
  sc=0x55555593b320, conf_offset=<optimized out>) at ../src/drivers/driver_macsec_linux.c:998

Signed-off-by: Davide Caratti <davide.caratti@gmail.com>
2017-03-26 21:13:21 +03:00
Sabrina Dubroca
f014d9dbf0 macsec_linux: Add a driver for macsec on Linux kernels
This uses libnl3 to communicate with the macsec module available on
Linux. A recent enough version of libnl is needed for the macsec.h file
(which is not yet available in a formal libnl release at the time of
this commit).

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
2016-11-30 20:08:36 +02:00