bert hubert wrote:
On Sun, Dec 10, 2006 at 03:37:27PM -0600, Larry Finger wrote:
casted to (void*). This compiled correctly but resulted in a
softlock, because mutex_lock was called with the wrong memory
address. The patch fixes the problem. Another issue was a wrong
(quickly, between christmas dinner preparations)
Does this explain the following, which happens reliably in stock 2.6.20-rc2
(in-kernel zd1211rw):
Dec 24 22:07:25 localhost kernel: [ 120.238914] SoftMAC: Open Authentication
completed with 00:0e:a6:16:28:a9
Dec 24 22:07:25 localhost kernel: [ 120.239005] BUG: unable to handle kernel
NULL pointer dereference at virtual address 00000006
Dec 24 22:07:25 localhost kernel: [ 120.239132] printing eip:
Dec 24 22:07:25 localhost kernel: [ 120.239191] c04cf8c5
Dec 24 22:07:25 localhost kernel: [ 120.239249] *pde = 00000000
Dec 24 22:07:25 localhost kernel: [ 120.239308] Oops: 0002 [#1]
Dec 24 22:07:25 localhost kernel: [ 120.239367] Modules linked in: capability
commoncap cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand
freq_table cpufreq_conservative zd1211rw ieee80211softmac usbhid ieee80211
ieee80211_crypt psmouse
Dec 24 22:07:25 localhost kernel: [ 120.239850] CPU: 0
Dec 24 22:07:25 localhost kernel: [ 120.239851] EIP:
0060:[__mutex_lock_slowpath+30/89] Not tainted VLI
Dec 24 22:07:25 localhost kernel: [ 120.239853] EFLAGS: 00010286 (2.6.20-rc2
#7)
Dec 24 22:07:25 localhost kernel: [ 120.240043] EIP is at
__mutex_lock_slowpath+0x1e/0x59
Dec 24 22:07:25 localhost kernel: [ 120.240106] eax: f5b449e0 ebx: f5b449dc
ecx: 00000006 edx: 00000004
Dec 24 22:07:25 localhost kernel: [ 120.240173] esi: c19005a0 edi: f5b44a40
ebp: f8862ce8 esp: c1909ec0
Dec 24 22:07:25 localhost kernel: [ 120.240241] ds: 007b es: 007b ss: 0068
Dec 24 22:07:25 localhost kernel: [ 120.240305] Process events/0 (pid: 4,
ti=c1908000 task=c19005a0 task.ti=c1908000)
Dec 24 22:07:25 localhost kernel: [ 120.240372] Stack: f5b449e0 00000006
00000020 f5b449a0 f5b44a40 c04cf7d8 f8862943 f72b8500
Dec 24 22:07:25 localhost kernel: [ 120.240676] 00000286 f5b44314
f5b449dc f5b44a40 00000001 00000000 f5e6c9c0 f5e6c9c0
Dec 24 22:07:25 localhost kernel: [ 120.240981] 00000000 f5b44a40
f8862ce8 f8862d50 00000004 00100100 00200200 00000004
Dec 24 22:07:25 localhost kernel: [ 120.241284] Call Trace:
Dec 24 22:07:25 localhost kernel: [ 120.241399] [mutex_lock+9/10]
mutex_lock+0x9/0xa
Dec 24 22:07:25 localhost kernel: [ 120.241485] [<f8862943>]
ieee80211softmac_assoc_work+0x1b/0x3c0 [ieee80211softmac]
Dec 24 22:07:25 localhost kernel: [ 120.241614] [<f8862ce8>]
ieee80211softmac_assoc_notify_auth+0x0/0x1e [ieee80211softmac]
Dec 24 22:07:25 localhost kernel: [ 120.241741] [<f8862d50>]
ieee80211softmac_notify_callback+0x40/0x48 [ieee80211softmac]
Dec 24 22:07:25 localhost kernel: [ 120.241866] [<f8862d10>]
ieee80211softmac_notify_callback+0x0/0x48 [ieee80211softmac]
Dec 24 22:07:25 localhost kernel: [ 120.241992] [<f8862ce8>]
ieee80211softmac_assoc_notify_auth+0x0/0x1e [ieee80211softmac]
Dec 24 22:07:25 localhost kernel: [ 120.242118] [<f8862d10>]
ieee80211softmac_notify_callback+0x0/0x48 [ieee80211softmac]
Dec 24 22:07:25 localhost kernel: [ 120.242243] [run_workqueue+139/311]
run_workqueue+0x8b/0x137
Dec 24 22:07:25 localhost kernel: [ 120.242336] [worker_thread+0/302]
worker_thread+0x0/0x12e
Dec 24 22:07:25 localhost kernel: [ 120.242422] [worker_thread+261/302]
worker_thread+0x105/0x12e
Dec 24 22:07:25 localhost kernel: [ 120.242509] [default_wake_function+0/12]
default_wake_function+0x0/0xc
Dec 24 22:07:25 localhost kernel: [ 120.242596] [kthread+155/191]
kthread+0x9b/0xbf
Dec 24 22:07:25 localhost kernel: [ 120.242682] [kthread+0/191]
kthread+0x0/0xbf
Dec 24 22:07:25 localhost kernel: [ 120.242767] [kernel_thread_helper+7/16]
kernel_thread_helper+0x7/0x10
Dec 24 22:07:25 localhost kernel: [ 120.242856] =======================
Dec 24 22:07:25 localhost kernel: [ 120.242915] Code: 00 00 00 31 d2 89 d0 83
c4 0c 5b 5e c3 56 53 83 ec 0c 89 c3 65 8b 35 08 00 00 00 8d 40 04 8b 48 04 89
60 04 89 04 24 89 4c 24 04 <89> 21 89 74 24 08 83 c8 ff 87 03 48 74 0d c7 06 02
00 00 00 e8
Dec 24 22:07:25 localhost kernel: [ 120.244531] EIP:
[__mutex_lock_slowpath+30/89] __mutex_lock_slowpath+0x1e/0x59 SS:ESP
0068:c1909ec0
This happens after starting wpa_supplicant on a zd1211rw device.
Yes, this error applies to any interface using softmac, not just bcm43xx.
Larry
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