WSL2-Linux-Kernel/net
Johannes Berg 0ff6ce7b36 cfg80211: fix deadlock
When removing an interface with nl80211, cfg80211 will
deadlock in the netdev notifier because we're already
holding rdev->mtx and try to acquire it again to verify
the scan has been done.

This bug was introduced by my patch
"cfg80211: check for and abort dangling scan requests".

To fix this, move the dangling scan request check into
wiphy_unregister(). This will not be able to catch all
cases right away, but if the scan problem happens with
a manual ifdown or so it will be possible to remedy it
by removing the module/device.

Additionally, add comments about the deadlock scenario.

Reported-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Christian Lamparter <chunkeey@web.de>
Tested-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-08-20 11:35:56 -04:00
..
9p 9p: Possible regression in p9_client_stat 2009-07-14 15:54:41 -05:00
802
8021q vlan: adds fcoe offload related net_device_ops and updates fcoe_ddp_xid field 2009-08-14 16:12:06 -07:00
appletalk Use correct NET_RX_* returns for atalk_rcv() 2009-08-12 20:44:50 -07:00
atm net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
ax25 net: Move rx skb_orphan call to where needed 2009-06-23 16:36:25 -07:00
bluetooth Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
bridge net/bridge: Add 'hairpin' port forwarding mode 2009-08-13 16:26:11 -07:00
can can: Use WARN_ONCE() instead of BUG_ON() for sanity check in receive path 2009-08-14 16:36:57 -07:00
core net: skb ftracer - add tracepoint to skb_copy_datagram_iovec (v3) 2009-08-13 16:26:14 -07:00
dcb
dccp Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
decnet net: remove NET_RX_BAD and NET_RX_CN* defines 2009-07-05 19:15:35 -07:00
dsa dsa: fix 88e6xxx statistics counter snapshotting 2009-07-05 18:03:35 -07:00
econet Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
ethernet
ieee802154 nl802154: support START-CONFIRM primitive 2009-08-12 21:54:51 -07:00
ipv4 net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
ipv6 inet6: Set default traffic class 2009-08-13 16:43:32 -07:00
ipx headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
irda Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
iucv net: adding memory barrier to the poll and receive callbacks 2009-07-09 17:06:57 -07:00
key net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
lapb net: remove NET_RX_BAD and NET_RX_CN* defines 2009-07-05 19:15:35 -07:00
llc net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
mac80211 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-14 16:07:21 -07:00
netfilter net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
netlabel Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-07-30 19:22:43 -07:00
netlink net/compat/wext: send different messages to compat tasks 2009-07-15 08:53:39 -07:00
netrom Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
packet af_packet: style cleanups 2009-07-23 18:01:10 -07:00
phonet Phonet: fix /proc/net/phonet with network namespaces 2009-08-12 22:13:19 -07:00
rds net/rds: Use AF_INET for sin_family field 2009-08-05 20:30:13 -07:00
rfkill rfkill: add the GPS radio type 2009-08-04 16:44:23 -04:00
rose Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
rxrpc net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
sched net: Avoid enqueuing skb for default qdiscs 2009-08-06 20:10:18 -07:00
sctp Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
sunrpc headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
tipc genetlink: make netns aware 2009-07-12 14:03:27 -07:00
unix net: adding memory barrier to the poll and receive callbacks 2009-07-09 17:06:57 -07:00
wanrouter headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
wimax wimax: fix warning caused by not checking retval of rfkill_set_hw_state() 2009-06-11 11:12:48 -07:00
wireless cfg80211: fix deadlock 2009-08-20 11:35:56 -04:00
x25 headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
xfrm Fix xfrm hash collisions by changing __xfrm4_daddr_saddr_hash to hash addresses with addition 2009-08-09 21:45:31 -07:00
Kconfig net/compat/wext: send different messages to compat tasks 2009-07-15 08:53:39 -07:00
Makefile net: remove redundant sched/ in net/Makefile 2009-07-12 20:11:14 -07:00
TUNABLE
compat.c net/compat/wext: send different messages to compat tasks 2009-07-15 08:53:39 -07:00
nonet.c
socket.c
sysctl_net.c