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Nikolay Aleksandrov d0fe8c888b netpoll: fix NULL pointer dereference in netpoll_cleanup 
I've been hitting a NULL ptr deref while using netconsole because the
np->dev check and the pointer manipulation in netpoll_cleanup are done
without rtnl and the following sequence happens when having a netconsole
over a vlan and we remove the vlan while disabling the netconsole:
	CPU 1					CPU2
					removes vlan and calls the notifier
enters store_enabled(), calls
netdev_cleanup which checks np->dev
and then waits for rtnl
					executes the netconsole netdev
					release notifier making np->dev
					== NULL and releases rtnl
continues to dereference a member of
np->dev which at this point is == NULL

Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2013-09-19 14:15:53 -04:00
..
Makefile net: move procfs code to net/core/net-procfs.c 2013-02-19 00:51:10 -05:00
datagram.c net: use skb_copy_datagram_from_iovec() in zerocopy_sg_from_iovec() 2013-08-07 16:52:38 -07:00
dev.c net: correctly interlink lower/upper devices 2013-09-04 00:27:26 -04:00
dev_addr_lists.c net/core: dev_mc_sync_multiple calls wrong helper 2013-05-31 16:56:56 -07:00
dev_ioctl.c net: fix kernel deadlock with interface rename and netdev name retrieval. 2013-06-26 13:42:54 -07:00
drop_monitor.c net: pass info struct via netdevice notifier 2013-05-28 13:11:01 -07:00
dst.c net: pass info struct via netdevice notifier 2013-05-28 13:11:01 -07:00
ethtool.c ethtool: fixed trailing statements in ethtool 2013-07-16 12:14:51 -07:00
fib_rules.c fib_rules: fix suppressor names and default values 2013-08-03 10:40:23 -07:00
filter.c sock_diag: fix filter code sent to userspace 2013-06-10 22:23:32 -07:00
flow.c net: delete __cpuinit usage from all net files 2013-07-14 19:36:58 -04:00
flow_dissector.c net: fix multiqueue selection 2013-09-11 16:10:00 -04:00
gen_estimator.c net_sched: add 64bit rate estimators 2013-06-11 02:51:03 -07:00
gen_stats.c net_sched: add 64bit rate estimators 2013-06-11 02:51:03 -07:00
iovec.c net: move iov_pages() to net/core/iovec.c 2013-08-07 16:52:33 -07:00
link_watch.c net: make all team port device link events urgent 2013-06-13 02:31:41 -07:00
neighbour.c net: neighbour: Remove CONFIG_ARPD 2013-09-03 21:41:43 -04:00
net-procfs.c rps: selective flow shedding during softnet overflow 2013-05-20 13:48:04 -07:00
net-sysfs.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2013-09-07 14:35:32 -07:00
net-sysfs.h xps: Add CONFIG_XPS 2010-11-28 18:24:14 -08:00
net-traces.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
net_namespace.c userns: Kill nsown_capable it makes the wrong thing easy 2013-08-30 23:44:11 -07:00
netevent.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
netpoll.c netpoll: fix NULL pointer dereference in netpoll_cleanup 2013-09-19 14:15:53 -04:00
netprio_cgroup.c cgroup: make cgroup_taskset deal with cgroup_subsys_state instead of cgroup 2013-08-08 20:11:27 -04:00
pktgen.c pktgen: add needed include file 2013-07-29 00:47:14 -07:00
request_sock.c tcp: fix a panic on UP machines in reqsk_fastopen_remove 2013-01-14 18:10:05 -05:00
rtnetlink.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-08-16 15:37:26 -07:00
scm.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2013-09-07 14:35:32 -07:00
secure_seq.c net: defer net_secret[] initialization 2013-04-29 15:14:02 -04:00
skbuff.c skb: allow skb_scrub_packet() to be used by tunnels 2013-09-04 00:27:25 -04:00
sock.c net: attempt high order allocations in sock_alloc_send_pskb() 2013-08-10 01:16:44 -07:00
sock_diag.c sock_diag: fix filter code sent to userspace 2013-06-10 22:23:32 -07:00
stream.c net: add sk_stream_is_writeable() helper 2013-07-24 17:54:48 -07:00
sysctl_net_core.c qdisc: allow setting default queuing discipline 2013-08-31 00:32:32 -04:00
timestamping.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
user_dma.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
utils.c net: core: move mac_pton() to lib/net_utils.c 2013-06-05 12:00:27 -07:00