Hello all,
ath5k will immediately crash when issuing the following command:
echo 2 > /sys/class/ieee80211/phy0/device/ani/ani_mode
The crash log looks like this:
[ 66.425365] BUG: unable to handle kernel NULL pointer dereference at 00000100
[ 66.425652] IP: [<e08e3008>] ath5k_ani_init+0xe/0x399 [ath5k]
[ 66.425856] *pdpt = 000000001f105001 *pde = 000000001cfff067 *pte =
0000000000000000
[ 66.425856] Oops: 0000 [#1] SMP
[ 66.425856] last sysfs file:
/sys/devices/pci0000:00/0000:00:1e.0/0000:01:00.0/ani/ani_mode
[ 66.425856] Modules linked in: arc4 ath5k ath mac80211 cfg80211 i2c_i801
e1000 e100 i2c_core iTCO_wdt rfkill mii serio_raw iTCO_vendor_support ipv6 uas
usb_storage [last unloaded: scsi_wait_scan]
[ 66.425856]
[ 66.425856] Pid: 758, comm: bash Not tainted 2.6.38.7-30.fc15.i686.PAE #1
[ 66.425856] EIP: 0060:[<e08e3008>] EFLAGS: 00010282 CPU: 0
[ 66.425856] EIP is at ath5k_ani_init+0xe/0x399 [ath5k]
[ 66.425856] EAX: 00000000 EBX: dc6d82c0 ECX: 00000028 EDX: 00000002
[ 66.425856] ESI: df08e000 EDI: 00000002 EBP: dc08bf20 ESP: dc08bf04
[ 66.425856] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 66.425856] Process bash (pid: 758, ti=dc08a000 task=df249920
task.ti=dc08a000)
[ 66.425856] Stack:
[ 66.425856] 00000000 00000000 dc6d82c0 df08e000 dc6d82c0 df08e000 00000002
dc08bf30
[ 66.425856] e08e389e e08e3870 00000002 dc08bf44 c067f51e 00000002 c0827d7c
ffffffed
[ 66.425856] dc08bf70 c0535901 00000002 b7695000 c0827d7c dc6b4454 de103068
dc3ed5d0
[ 66.425856] Call Trace:
[ 66.425856] [<e08e389e>] ath5k_attr_store_ani_mode+0x2e/0x35 [ath5k]
[ 66.425856] [<e08e3870>] ? ath5k_attr_store_ani_mode+0x0/0x35 [ath5k]
[ 66.425856] [<c067f51e>] dev_attr_store+0x24/0x29
[ 66.425856] [<c0535901>] sysfs_write_file+0xc3/0xee
[ 66.425856] [<c04ede4e>] vfs_write+0x8f/0xd7
[ 66.425856] [<c053583e>] ? sysfs_write_file+0x0/0xee
[ 66.425856] [<c04ee010>] sys_write+0x42/0x63
[ 66.425856] [<c040969f>] sysenter_do_call+0x12/0x28
[ 66.425856] Code: 35 00 00 81 fa c8 00 00 00 76 10 8b 80 ec 00 00 00 05 50 35
00 00 e8 08 f2 ff ff 5d c3 55 89 e5 57 56 53 83 ec 10 3e 8d 74 26 00
[ 66.425856] b8 00 01 00 00 01 89 c3 89 d6 0f 86 72 03 00 00 8b 90 ec 00
[ 66.425856] EIP: [<e08e3008>] ath5k_ani_init+0xe/0x399 [ath5k] SS:ESP
0068:dc08bf04
[ 66.425856] CR2: 0000000000000100
[ 66.440753] ---[ end trace c4184f758b4246d0 ]---
BTW, is there any documentation about the different values in "ani_mode"?
--
Regards
Joerg
On 06/29/2011 05:28 AM, Joerg Pommnitz wrote:
> Hello all,
> ath5k will immediately crash when issuing the following command:
>
> echo 2> /sys/class/ieee80211/phy0/device/ani/ani_mode
>
> The crash log looks like this:
>
> [ 66.425365] BUG: unable to handle kernel NULL pointer dereference at 00000100
> [ 66.425652] IP: [<e08e3008>] ath5k_ani_init+0xe/0x399 [ath5k]
It looks like we have a major bug in the ath5k sysfs code! drvdata is
set to hw as it should, but the sysfs code assumes it's set to sc. I'm
testing a patch now.
--
Regards,
Pavel Roskin