Luis R. Rodriguez b1ed8ddd21 cfg80211: fix bug while trying to process beacon hints on init ... During initialization we would not have received any beacons so skip processing reg beacon hints, also adds a check to reg_is_world_roaming() for last_request before accessing its fields. This should fix this: BUG: unable to handle kernel NULL pointer dereference at IP: [<e0171332>] wiphy_update_regulatory+0x20f/0x295 *pdpt = 0000000008bf1001 *pde = 0000000000000000 Oops: 0000 [#1] last sysfs file: /sys/class/backlight/eeepc/brightness Modules linked in: ath5k(+) mac80211 led_class cfg80211 go_bit cfbcopyarea cfbimgblt cfbfillrect ipv6 ydev usual_tables(P) snd_hda_codec_realtek snd_hda_intel nd_hwdep uhci_hcd snd_pcm_oss snd_mixer_oss i2c_i801 e serio_raw i2c_core pcspkr atl2 snd_pcm intel_agp re agpgart eeepc_laptop snd_page_alloc ac video backlight rfkill button processor evdev thermal fan ata_generic Pid: 2909, comm: modprobe Tainted: Pc #112) 701 EIP: 0060:[<e0171332>] EFLAGS: 00010246 CPU: 0 EIP is at wiphy_update_regulatory+0x20f/0x295 [cfg80211] EAX: 00000000 EBX: c5da0000 ECX: 00000000 EDX: c5da0060 ESI: 0000001a EDI: c5da0060 EBP: df3bdd70 ESP: df3bdd40 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 Process modprobe (pid: 2909, ti=df3bc000 task=c5d030000) Stack: df3bdd90 c5da0060 c04277e0 00000001 00000044 c04277e402 00000002 c5da0000 0000001a c5da0060 df3bdda8 e01706a2 02 00000282 000080d0 00000068 c5d53500 00000080 0000028240 Call Trace: [<e01706a2>] ? wiphy_register+0x122/0x1b7 [cfg80211] [<e0328e02>] ? ieee80211_register_hw+0xd8/0x346 [<e06a7c9f>] ? ath5k_hw_set_bssid_mask+0x71/0x78 [ath5k] [<e06b0c52>] ? ath5k_pci_probe+0xa5c/0xd0a [ath5k] [<c01a6037>] ? sysfs_find_dirent+0x16/0x27 [<c01fec95>] ? local_pci_probe+0xe/0x10 [<c01ff526>] ? pci_device_probe+0x48/0x66 [<c024c9fd>] ? driver_probe_device+0x7f/0xf2 [<c024cab3>] ? __driver_attach+0x43/0x5f [<c024c0af>] ? bus_for_each_dev+0x39/0x5a [<c024c8d0>] ? driver_attach+0x14/0x16 [<c024ca70>] ? __driver_attach+0x0/0x5f [<c024c5b3>] ? bus_add_driver+0xd7/0x1e7 [<c024ccb9>] ? driver_register+0x7b/0xd7 [<c01ff827>] ? __pci_register_driver+0x32/0x85 [<e00a8018>] ? init_ath5k_pci+0x18/0x30 [ath5k] [<c0101131>] ? _stext+0x49/0x10b [<e00a8000>] ? init_ath5k_pci+0x0/0x30 [ath5k] [<c012f452>] ? __blocking_notifier_call_chain+0x40/0x4c [<c013a714>] ? sys_init_module+0x87/0x18b [<c0102804>] ? sysenter_do_call+0x12/0x22 Code: b8 da 17 e0 83 c0 04 e8 92 f9 ff ff 84 c0 75 2a 8b 85 c0 74 0c 83 c0 04 e8 7c f9 ff ff 84 c0 75 14 a1 bc da 4 03 74 66 8b 4d d4 80 79 08 00 74 5d a1 e0 d2 17 e0 48 EIP: [<e0171332>] wiphy_update_regulatory+0x20f/0x295 SP 0068:df3bdd40 CR2: 0000000000000004 ---[ end trace 830f2dd2a95fd1a8 ]--- This issue is hard to reproduce, but it was noticed and discussed on this thread: http://marc.info/?t=123938022700005&r=1&w=2 Cc: stable@kernel.org Reported-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>		2009-05-04 16:22:13 -04:00
..
9p	9p: fix sparse warning: cast adds address space	2009-02-26 23:13:32 -08:00
802	tr: fix leakage of device in net/802/tr.c	2009-04-11 01:43:17 -07:00
8021q	vlan: update vlan carrier state for admin up/down	2009-04-25 18:03:35 -07:00
appletalk	proc 2/2: remove struct proc_dir_entry::owner	2009-03-31 01:14:44 +04:00
atm	Subject: [PATCH] br2684: restore net_dev initialization	2009-05-02 13:49:36 -07:00
ax25	ax25: proc uid file misses header	2009-04-20 02:14:59 -07:00
bluetooth	Bluetooth: Fix connection establishment with low security requirement	2009-04-28 09:31:39 -07:00
bridge	netfilter: bridge: allow fragmentation of VLAN packets traversing a bridge	2009-04-20 17:12:35 +02:00
can	can: Network Drop Monitor: Make use of consume_skb() in af_can.c	2009-04-17 01:38:46 -07:00
core	net: Fix skb_tx_hash() for forwarding workloads.	2009-05-01 09:05:06 -07:00
dcb	DCB: fix kfree(skb)	2009-01-04 17:29:21 -08:00
dccp	dccp: Do not let initial option overhead shrink the MPS	2009-03-02 03:07:23 -08:00
decnet	net/*: use linux/kernel.h swap()	2009-03-21 13:36:17 -07:00
dsa	dsa: add switch chip cascading support	2009-03-21 19:06:54 -07:00
econet	net: convert usage of packet_type to read_mostly	2009-03-10 05:22:43 -07:00
ethernet	eth: Declare an optimized compare_ether_addr_64bits() function	2008-11-23 23:24:32 -08:00
ipv4	netfilter: revised locking for x_tables	2009-04-28 22:36:33 -07:00
ipv6	netfilter: revised locking for x_tables	2009-04-28 22:36:33 -07:00
ipx	ipx: use constant for strings and desciptor	2009-03-21 19:06:51 -07:00
irda	proc tty: switch ircomm to ->proc_fops	2009-04-01 08:59:10 -07:00
iucv	af_iucv: Fix race when queuing incoming iucv messages	2009-04-21 23:43:15 -07:00
key	af_key: remove some pointless conditionals before kfree_skb()	2009-02-26 23:07:32 -08:00
lapb	[LAPB] net/lapb/lapb_iface.c: use LIST_HEAD instead of LIST_HEAD_INIT	2008-01-28 14:56:52 -08:00
llc	proc 2/2: remove struct proc_dir_entry::owner	2009-03-31 01:14:44 +04:00
mac80211	mac80211: correct fragmentation threshold check	2009-05-04 16:22:08 -04:00
netfilter	xt_socket: checks for the state of nf_conntrack	2009-05-01 15:23:10 -07:00
netlabel	netlabel: Always remove the correct address selector	2009-04-22 00:46:09 -07:00
netlink	Merge branch 'master' of /home/davem/src/GIT/linux-2.6/	2009-03-26 15:23:24 -07:00
netrom	net/netrom: Fix socket locking	2009-04-22 00:49:51 -07:00
packet	packet: avoid warnings when high-order page allocation fails	2009-04-15 03:39:52 -07:00
phonet	trivial: fix typos/grammar errors in Kconfig texts	2009-03-30 15:22:01 +02:00
rds	RDS: Use spinlock to protect 64b value update on 32b archs	2009-04-02 00:52:22 -07:00
rfkill	net/rfkill/rfkill.c: fix unused rfkill_led_trigger() warning	2009-01-04 17:11:24 -08:00
rose	Revert "rose: zero length frame filtering in af_rose.c"	2009-04-14 20:28:00 -07:00
rxrpc	RxRPC: Fix a potential NULL dereference	2009-02-06 21:50:52 -08:00
sched	net: Only store high 16 bits of kernel generated filter priorities	2009-05-02 13:48:32 -07:00
sctp	proc 2/2: remove struct proc_dir_entry::owner	2009-03-31 01:14:44 +04:00
sunrpc	Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linux	2009-04-06 13:25:56 -07:00
tipc	tipc: fix non-const printf format arguments	2009-03-18 19:11:29 -07:00
unix	New helper - current_umask()	2009-03-31 23:00:26 -04:00
wanrouter	wanrouter: fix sparse warnings: context imbalance	2009-02-26 23:13:36 -08:00
wimax	trivial: fix typos/grammar errors in Kconfig texts	2009-03-30 15:22:01 +02:00
wireless	cfg80211: fix bug while trying to process beacon hints on init	2009-05-04 16:22:13 -04:00
x25	af_rose/x25: Sanity check the maximum user frame size	2009-03-27 00:28:21 -07:00
xfrm	xfrm: wrong hash value for temporary SA	2009-04-27 02:58:59 -07:00
compat.c	net: socket infrastructure for SO_TIMESTAMPING	2009-02-15 22:43:35 -08:00
Kconfig	trivial: fix typos/grammar errors in Kconfig texts	2009-03-30 15:22:01 +02:00
Makefile	RDS: Kconfig and Makefile	2009-02-26 23:43:35 -08:00
nonet.c
socket.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	2009-04-06 18:05:43 -07:00
sysctl_net.c	net: sysctl_net - use net_eq to compare nets	2009-03-16 16:23:30 +01:00
TUNABLE