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linux-stable/net/tipc
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Parthasarathy Bhuvaragan 4de13d7ed6 tipc: fix nullptr crash during subscription cancel 
commit 4d5cfcba2f ('tipc: fix connection abort during subscription
cancel'), removes the check for a valid subscription before calling
tipc_nametbl_subscribe().

This will lead to a nullptr exception when we process a
subscription cancel request. For a cancel request, a null
subscription is passed to tipc_nametbl_subscribe() resulting
in exception.

In this commit, we call tipc_nametbl_subscribe() only for
a valid subscription.

Fixes: 4d5cfcba2f ('tipc: fix connection abort during subscription cancel')
Reported-by: Anders Widell <anders.widell@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2016-03-06 23:00:08 -05:00
..
Kconfig tipc: add ip/udp media type 2015-03-05 22:08:42 -05:00
Makefile tipc: add ip/udp media type 2015-03-05 22:08:42 -05:00
addr.c tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
addr.h tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
bcast.c tipc: narrow down interface towards struct tipc_link 2015-11-20 14:06:10 -05:00
bcast.h tipc: narrow down exposure of struct tipc_node 2015-11-20 14:06:10 -05:00
bearer.c tipc: eliminate remnants of hungarian notation 2015-11-20 14:06:10 -05:00
bearer.h tipc: eliminate remnants of hungarian notation 2015-11-20 14:06:10 -05:00
core.c tipc: create broadcast transmission link at namespace init 2015-10-24 06:56:27 -07:00
core.h tipc: reduce code dependency between binding table and node layer 2015-11-20 14:06:10 -05:00
discover.c tipc: eliminate remnants of hungarian notation 2015-11-20 14:06:10 -05:00
discover.h tipc: involve namespace infrastructure 2015-01-12 16:24:32 -05:00
eth_media.c tipc: make media address offset a common define 2015-02-27 18:18:48 -05:00
ib_media.c tipc: rename media/msg related definitions 2015-02-27 18:18:48 -05:00
link.c tipc: unlock in error path 2016-02-19 15:38:44 -05:00
link.h tipc: eliminate remnants of hungarian notation 2015-11-20 14:06:10 -05:00
msg.c tipc: let broadcast packet reception use new link receive function 2015-10-24 06:56:37 -07:00
msg.h tipc: let broadcast packet reception use new link receive function 2015-10-24 06:56:37 -07:00
name_distr.c tipc: reduce code dependency between binding table and node layer 2015-11-20 14:06:10 -05:00
name_distr.h tipc: reduce code dependency between binding table and node layer 2015-11-20 14:06:10 -05:00
name_table.c tipc: reduce code dependency between binding table and node layer 2015-11-20 14:06:10 -05:00
name_table.h tipc: convert legacy nl name table dump to nl compat 2015-02-09 13:20:48 -08:00
net.c tipc: create broadcast transmission link at namespace init 2015-10-24 06:56:27 -07:00
net.h tipc: make tipc node table aware of net namespace 2015-01-12 16:24:32 -05:00
netlink.c tipc: narrow down interface towards struct tipc_link 2015-11-20 14:06:10 -05:00
netlink.h tipc: move and rename the legacy nl api to "nl compat" 2015-02-09 13:20:47 -08:00
netlink_compat.c tipc: narrow down interface towards struct tipc_link 2015-11-20 14:06:10 -05:00
node.c tipc: fix premature addition of node to lookup table 2016-02-16 15:57:11 -05:00
node.h tipc: narrow down interface towards struct tipc_link 2015-11-20 14:06:10 -05:00
server.c tipc: use sock_create_kern interface to create kernel socket 2015-05-14 13:39:33 -04:00
server.h tipc: make subscriber server support net namespace 2015-01-12 16:24:33 -05:00
socket.c tipc: Revert "tipc: use existing sk_write_queue for outgoing packet chain" 2016-03-03 16:30:29 -05:00
socket.h tipc: clean up socket layer message reception 2015-07-26 16:31:50 -07:00
subscr.c tipc: fix nullptr crash during subscription cancel 2016-03-06 23:00:08 -05:00
subscr.h tipc: rename functions defined in subscr.c 2015-05-04 15:04:00 -04:00
sysctl.c tipc: add name distributor resiliency queue 2014-09-01 17:51:48 -07:00
udp_media.c ip_tunnel: Move stats update to iptunnel_xmit() 2015-12-25 23:32:23 -05:00