From 253850c10d1f9af46f4870616ed29f38ed39fd15 Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Tue, 1 Sep 2009 08:22:43 -0700 Subject: wireless: update reg debug kconfig entry Refer to the wireless wiki for more information. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- net/wireless/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'net') diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig index aea7e6824af9..68c504fab122 100644 --- a/net/wireless/Kconfig +++ b/net/wireless/Kconfig @@ -40,6 +40,10 @@ config CFG80211_REG_DEBUG default n ---help--- You can enable this if you want to debug regulatory changes. + For more information on cfg80211 regulatory refer to the wireless + wiki: + + http://wireless.kernel.org/en/developers/Regulatory If unsure, say N. -- cgit v1.2.3 From abd8ea22c23c917f56fefcda8a4468fbc2247d7f Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Tue, 1 Sep 2009 08:22:46 -0700 Subject: wireless: remove mac80211 rate selection extra menu We can just display this upon enabling mac80211 with an 'if MAC80211 != n' check. Cc: Johannes Berg Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- net/mac80211/Kconfig | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'net') diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig index 9db4ff836a3d..4d5543af3123 100644 --- a/net/mac80211/Kconfig +++ b/net/mac80211/Kconfig @@ -13,8 +13,7 @@ config MAC80211 comment "CFG80211 needs to be enabled for MAC80211" depends on CFG80211=n -menu "Rate control algorithm selection" - depends on MAC80211 != n +if MAC80211 != n config MAC80211_RC_PID bool "PID controller based rate control algorithm" if EMBEDDED @@ -61,7 +60,7 @@ config MAC80211_RC_DEFAULT default "pid" if MAC80211_RC_DEFAULT_PID default "" -endmenu +endif config MAC80211_MESH bool "Enable mac80211 mesh networking (pre-802.11s) support" -- cgit v1.2.3 From fcc6cb0c13555e78c2d47257b6d1b5e59b0c419a Mon Sep 17 00:00:00 2001 From: Bob Copeland Date: Tue, 1 Sep 2009 18:12:11 -0400 Subject: cfg80211: fix looping soft lockup in find_ie() The find_ie() function uses a size_t for the len parameter, and directly uses len as a loop variable. If any received packets are malformed, it is possible for the decrease of len to overflow, and since the result is unsigned, the loop will not terminate. Change it to a signed int so the loop conditional works for negative values. This fixes the following soft lockup: [38573.102007] BUG: soft lockup - CPU#0 stuck for 61s! [phy0:2230] [38573.102007] Modules linked in: aes_i586 aes_generic fuse af_packet ipt_REJECT xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_state iptable_filter ip_tables x_tables acpi_cpufreq binfmt_misc dm_mirror dm_region_hash dm_log dm_multipath dm_mod kvm_intel kvm uinput i915 arc4 ecb drm snd_hda_codec_idt ath5k snd_hda_intel hid_apple mac80211 usbhid appletouch snd_hda_codec snd_pcm ath cfg80211 snd_timer i2c_algo_bit ohci1394 video snd processor ieee1394 rfkill ehci_hcd sg sky2 backlight snd_page_alloc uhci_hcd joydev output ac thermal button battery sr_mod applesmc cdrom input_polldev evdev unix [last unloaded: scsi_wait_scan] [38573.102007] irq event stamp: 2547724535 [38573.102007] hardirqs last enabled at (2547724534): [] restore_all_notrace+0x0/0x18 [38573.102007] hardirqs last disabled at (2547724535): [] apic_timer_interrupt+0x28/0x34 [38573.102007] softirqs last enabled at (92950144): [] __do_softirq+0x108/0x210 [38573.102007] softirqs last disabled at (92950274): [] _spin_lock_bh+0x14/0x80 [38573.102007] [38573.102007] Pid: 2230, comm: phy0 Tainted: G W (2.6.31-rc7-wl #8) MacBook1,1 [38573.102007] EIP: 0060:[] EFLAGS: 00010292 CPU: 0 [38573.102007] EIP is at cmp_ies+0x30/0x180 [cfg80211] [38573.102007] EAX: 00000082 EBX: 00000000 ECX: ffffffc1 EDX: d8efd014 [38573.102007] ESI: ffffff7c EDI: 0000004d EBP: eee2dc50 ESP: eee2dc3c [38573.102007] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [38573.102007] CR0: 8005003b CR2: d8efd014 CR3: 01694000 CR4: 000026d0 [38573.102007] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [38573.102007] DR6: ffff0ff0 DR7: 00000400 [38573.102007] Call Trace: [38573.102007] [] cmp_bss+0xed/0x100 [cfg80211] [38573.102007] [] cfg80211_bss_update+0x84/0x410 [cfg80211] [38573.102007] [] cfg80211_inform_bss_frame+0x114/0x180 [cfg80211] [38573.102007] [] ieee80211_bss_info_update+0x4f/0x180 [mac80211] [38573.102007] [] ieee80211_rx_bss_info+0x88/0xf0 [mac80211] [38573.102007] [] ? ieee802_11_parse_elems+0x27/0x30 [mac80211] [38573.102007] [] ieee80211_rx_mgmt_probe_resp+0xa4/0x1c0 [mac80211] [38573.102007] [] ieee80211_sta_rx_queued_mgmt+0x919/0xc50 [mac80211] [38573.102007] [] ? sched_clock+0x27/0xa0 [38573.102007] [] ? sched_clock+0x27/0xa0 [38573.102007] [] ? mark_held_locks+0x60/0x80 [38573.102007] [] ? _spin_unlock_irqrestore+0x55/0x70 [38573.102007] [] ? sub_preempt_count+0x85/0xc0 [38573.102007] [] ? _spin_unlock_irqrestore+0x3e/0x70 [38573.102007] [] ? skb_dequeue+0x4f/0x70 [38573.102007] [] ieee80211_sta_work+0x91/0xb80 [mac80211] [38573.102007] [] ? sched_clock+0x27/0xa0 [38573.102007] [] ? sub_preempt_count+0x85/0xc0 [38573.102007] [] worker_thread+0x18f/0x320 [38573.102007] [] ? worker_thread+0x12e/0x320 [38573.102007] [] ? _spin_unlock_irqrestore+0x55/0x70 [38573.102007] [] ? ieee80211_sta_work+0x0/0xb80 [mac80211] [38573.102007] [] ? autoremove_wake_function+0x0/0x50 [38573.102007] [] ? worker_thread+0x0/0x320 [38573.102007] [] kthread+0x84/0x90 [38573.102007] [] ? kthread+0x0/0x90 [38573.102007] [] kernel_thread_helper+0x7/0x10 Cc: stable@kernel.org Signed-off-by: Bob Copeland Signed-off-by: John W. Linville --- net/wireless/scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 7043de6221ab..19c5a9a8d085 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -141,7 +141,7 @@ void cfg80211_bss_expire(struct cfg80211_registered_device *dev) dev->bss_generation++; } -static u8 *find_ie(u8 num, u8 *ies, size_t len) +static u8 *find_ie(u8 num, u8 *ies, int len) { while (len > 2 && ies[0] != num) { len -= ies[1] + 2; -- cgit v1.2.3