Xin Long 42dec1dbe3 tipc: add NULL pointer check before calling kfree_rcu ... Unlike kfree(p), kfree_rcu(p, rcu) won't do NULL pointer check. When tipc_nametbl_remove_publ returns NULL, the panic below happens: BUG: unable to handle kernel NULL pointer dereference at 0000000000000068 RIP: 0010:__call_rcu+0x1d/0x290 Call Trace: <IRQ> tipc_publ_notify+0xa9/0x170 [tipc] tipc_node_write_unlock+0x8d/0x100 [tipc] tipc_node_link_down+0xae/0x1d0 [tipc] tipc_node_check_dest+0x3ea/0x8f0 [tipc] ? tipc_disc_rcv+0x2c7/0x430 [tipc] tipc_disc_rcv+0x2c7/0x430 [tipc] ? tipc_rcv+0x6bb/0xf20 [tipc] tipc_rcv+0x6bb/0xf20 [tipc] ? ip_route_input_slow+0x9cf/0xb10 tipc_udp_recv+0x195/0x1e0 [tipc] ? tipc_udp_is_known_peer+0x80/0x80 [tipc] udp_queue_rcv_skb+0x180/0x460 udp_unicast_rcv_skb.isra.56+0x75/0x90 __udp4_lib_rcv+0x4ce/0xb90 ip_local_deliver_finish+0x11c/0x210 ip_local_deliver+0x6b/0xe0 ? ip_rcv_finish+0xa9/0x410 ip_rcv+0x273/0x362 Fixes: 97ede29e80 ("tipc: convert name table read-write lock to RCU") Reported-by: Li Shuang <shuali@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-09-05 09:58:49 +02:00
..
addr.c	tipc: initialise addr_trail_end when setting node addresses	2019-08-11 21:40:04 -07:00
addr.h	tipc: add 128-bit node identifier	2018-03-23 13:12:18 -04:00
bcast.c	tipc: rename function msg_get_wrapped() to msg_inner_hdr()	2019-06-25 13:42:54 -07:00
bcast.h	tipc: fix a null pointer deref	2019-03-21 09:56:55 -07:00
bearer.c	tipc: use rcu dereference functions properly	2019-07-07 13:18:53 -07:00
bearer.h	tipc: enable tracepoints in tipc	2018-12-19 11:49:24 -08:00
core.c	tipc: change to use register_pernet_device	2019-06-22 16:51:47 -07:00
core.h	tipc: introduce new capability flag for cluster	2019-03-19 13:56:17 -07:00
diag.c	tipc: switch to rhashtable iterator	2018-08-29 18:04:54 -07:00
discover.c	tipc: fix lockdep warning when reinitilaizing sockets	2018-11-17 22:01:31 -08:00
discover.h	tipc: some cleanups in the file discover.c	2018-03-23 13:12:17 -04:00
eth_media.c	tipc: make media address offset a common define	2015-02-27 18:18:48 -05:00
group.c	tipc: purge deferredq list for each grp member in tipc_group_delete	2019-06-16 20:42:05 -07:00
group.h	tipc: extend sock diag for group communication	2018-06-30 21:05:42 +09:00
ib_media.c	tipc: rename media/msg related definitions	2015-02-27 18:18:48 -05:00
Kconfig	docs: kbuild: convert docs to ReST and rename to *.rst	2019-06-14 14:21:21 -06:00
link.c	tipc: fix false detection of retransmit failures	2019-08-16 16:27:13 -07:00
link.h	tipc: fix missing Name entries due to half-failover	2019-05-04 00:59:51 -04:00
Makefile	tipc: enable tracepoints in tipc	2018-12-19 11:49:24 -08:00
monitor.c	netlink: make nla_nest_start() add NLA_F_NESTED flag	2019-04-27 17:03:44 -04:00
monitor.h	tipc: dump monitor attributes	2016-07-26 14:26:42 -07:00
msg.c	tipc: buffer overflow handling in listener socket	2018-09-29 11:24:22 -07:00
msg.h	tipc: fix false detection of retransmit failures	2019-08-16 16:27:13 -07:00
name_distr.c	tipc: add NULL pointer check before calling kfree_rcu	2019-09-05 09:58:49 +02:00
name_distr.h	tipc: permit overlapping service ranges in name table	2018-03-31 22:19:52 -04:00
name_table.c	netlink: make nla_nest_start() add NLA_F_NESTED flag	2019-04-27 17:03:44 -04:00
name_table.h	tipc: eliminate message disordering during binding table update	2018-10-22 19:29:12 -07:00
net.c	netlink: make validation more configurable for future strictness	2019-04-27 17:07:21 -04:00
net.h	tipc: fix lockdep warning when reinitilaizing sockets	2018-11-17 22:01:31 -08:00
netlink_compat.c	tipc: compat: allow tipc commands without arguments	2019-08-01 18:14:00 -04:00
netlink.c	tipc: fix missing indentation in source code	2019-06-24 07:29:45 -07:00
netlink.h	tipc: make cluster size threshold for monitoring configurable	2016-07-26 14:26:42 -07:00
node.c	tipc: initialize 'validated' field of received packets	2019-07-17 15:24:38 -07:00
node.h	tipc: improve TIPC throughput by Gap ACK blocks	2019-04-04 18:29:25 -07:00
socket.c	tipc: fix unitilized skb list crash	2019-07-30 14:39:36 -07:00
socket.h	tipc: add trace_events for tipc socket	2018-12-19 11:49:24 -08:00
subscr.c	tipc: fix unbalanced reference counter	2018-04-12 21:46:10 -04:00
subscr.h	tipc: fix modprobe tipc failed after switch order of device registration	2019-05-20 10:45:43 -07:00
sysctl.c	proc/sysctl: add shared variables for range check	2019-07-18 17:08:07 -07:00
topsrv.c	tipc: Fix a typo	2019-07-21 11:41:01 -07:00
topsrv.h	tipc: rename tipc_server to tipc_topsrv	2018-02-16 15:26:34 -05:00
trace.c	tipc: remove unneeded semicolon in trace.c	2019-01-17 22:04:43 -08:00
trace.h	tipc: add trace_events for tipc bearer	2018-12-19 11:49:25 -08:00
udp_media.c	tipc: use rcu dereference functions properly	2019-07-07 13:18:53 -07:00
udp_media.h	tipc: implement configuration of UDP media MTU	2018-04-20 11:04:05 -04:00