#732: kernel panic on soekris 4526
---------------------------------+------------------------------------------
Reporter: [EMAIL PROTECTED] | Owner:
Type: defect | Status: new
Priority: major | Milestone:
Component: madwifi: other | Version:
Keywords: kernel panic | Patch_attached: 0
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Recently built a kernel (2.6.15.7) and madwifi-ng (svn r1660) which seems
to run okay on a soekris 4826 board, but kernel panics on a 4526. The
primary difference between these two boards is that the 4826 uses a Geode
(a pentium equivalent) and the 4526 uses a 486 equivalent CPU. The kernel
was compiled for 486. On the 4526, when adding the the WDS link info, the
kernel panics thusly:
{{{
ath2: Added WDS MAC: 00:0b:6b:35:c8:bd
Unable to handle kernel NULL pointer dereference at virtual address
00000000
printing eip:
c486856f
*pde = 00000000
Oops: 0000 [#1]
Modules linked in: wlan_scan_ap ath_pci ath_rate_sample wlan ath_hal
CPU: 0
EIP: 0060:[<c486856f>] Tainted: P VLI
EFLAGS: 00010282 (2.6.15.7-metrix)
EIP is at ieee80211_beacon_update+0xf/0x7f0 [wlan]
eax: 00000000 ebx: 00000000 ecx: c3c80260 edx: 00000000
esi: c389e260 edi: c3c80260 ebp: 00000000 esp: c3d29ed0
ds: 007b es: 007b ss: 0068
Process sh (pid: 258, threadinfo=c3d28000 task=c3c3a5d0)
Stack: 00000000 c389e260 c3c80260 00000000 00000001 c0129ee8 00000000
c3c828b4
b7dae114 00000000 c4896fb5 00000000 c389e92c 00000000 00000000
c389e260
00000001 c3d29f4c c3c819c0 c119b460 00000000 c10c8000 c48972ce
c3c80260
Call Trace:
[<c0129ee8>] filemap_nopage+0x168/0x2c0
[<c4896fb5>] ath_beacon_generate+0x115/0x260 [ath_pci]
[<c48972ce>] ath_beacon_send+0x1ce/0x370 [ath_pci]
[<c4893e52>] ath_intr+0x162/0x2b0 [ath_pci]
[<c010bc89>] do_page_fault+0x189/0x544
[<c0127f4e>] handle_IRQ_event+0x2e/0x60
[<c0127ff0>] __do_IRQ+0x70/0xc0
[<c01040ac>] do_IRQ+0x1c/0x30
[<c0102a3a>] common_interrupt+0x1a/0x20
Code: 14 66 c7 42 16 00 00 89 d8 5b 5e 5f 5d 83 c4 08 c3 8d 74 26 00 8d bc
27 00 00 00 00 83 ec 18 55 57 56 53 8b 44 24 2c 8b 54 24 2c <8b> 00 89 44
24 10 8b 6a 04 c7 44 24 24 00 00 00 00 f6 45 57 40
<0>Kernel panic - not syncing: Fatal exception in interrupt
}}}
The panic occurs when the following /etc/network/interfaces stanza is
ifup'd:
{{{
auto ath1
iface ath1 inet static
address 1.0.0.0
netmask 255.255.255.255
broadcast 255.255.255.255
pre-up modprobe ath-pci autocreate=none
pre-up wlanconfig ath1 create wlandev wifi0 wlanmode ap
pre-up wlanconfig ath2 create wlandev wifi0 wlanmode wds
pre-up iwconfig ath1 essid backhaul
pre-up iwpriv ath2 wds_add 00:0b:6b:35:c8:bd
pre-up iwpriv ath2 wds 1
pre-up ifconfig ath2 up
up iwconfig ath1 channel 161
up brctl addif br0 ath1
up brctl addif br0 ath2
down brctl delif br0 ath1
down brctl delif br0 ath2
post-down wlanconfig ath1 destroy
post-down wlanconfig ath2 destroy
}}}
Here's a link to [http://www.personaltelco.net/~russell/soekris-4526-
panic-2006-07-01.log a boot log] showing the panic in context. Here is
the [http://www.personaltelco.net/~russell/soekris-4526-panic-2006-07-
01.config linux kernel .config].
--
Ticket URL: <http://madwifi.org/ticket/732>
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