oops in prism2_usb from 2.6.15-20

[John Steele Scott]

I was playing around with some network settings today, and managed to cause an oops in the prism2_usb module. I'm not sure exactly how, but it seems to have happened straight after the link came up.

After the oops, my keyboard was no longer responsive. I couldn't switch virtual terminals, had to do a Ctrl-Apple-Power to reboot. This is with 2.6.15-20, on an iBook G4.

Apr 8 08:34:39 fuzz kernel: [18725.327909] linkstatus=DISCONNECTED (unhandled)
Apr 8 08:34:39 fuzz kernel: [18725.798924] linkstatus=CONNECTED
Apr 8 08:34:39 fuzz kernel: [18725.805982] kernel BUG in add_timer at include/linux/timer.h:83!
Apr 8 08:34:39 fuzz kernel: [18725.806001] Oops: Exception in kernel mode, sig: 5 [#1]
Apr 8 08:34:39 fuzz kernel: [18725.806009] Modules linked in: prism2_usb arc4 ieee80211_crypt_wep binfmt_misc
rfcomm l2cap bluetooth af_packet nfsd exportfs lockd sunrpc autofs4 radeon drm cpufreq_powersave cpufreq_stats
cpufreq_userspace cpufreq_ondemand cpufreq_conservative dm_mod md_mod therm_adt746x sr_mod ipv6 snd_powermac snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc sbp2 scsi_mod apm_emu yenta_socket rsrc_nonstatic pcmcia_core sungem sungem_phy ohci1394 ieee1394 ieee80211softmac ieee80211 ieee80211_crypt uninorth_agp agpgart tsdev evdev usbhid reiserfs ehci_hcd ohci_hcd usbcore ide_disk ide_cd cdrom i2c_keywest capability commoncap
Apr 8 08:34:39 fuzz kernel: [18725.806134] NIP: DA85008C LR: DA850054 CTR: C0061BC0
Apr 8 08:34:39 fuzz kernel: [18725.806145] REGS: c1fd3e40 TRAP: 0700 Not tainted (2.6.15-20-powerpc)
Apr 8 08:34:39 fuzz kernel: [18725.806154] MSR: 00029032 <EE,ME,IR,DR> CR: 84008022 XER: 20000000
Apr 8 08:34:39 fuzz kernel: [18725.806175] TASK = d7fc0610[4] 'events/0' THREAD: c1fd2000
Apr 8 08:34:39 fuzz kernel: [18725.806183] GPR00: 00000001 C1FD3EF0 D7FC0610 DA85A75C DA8595CC 00000002 D6D64BE1 00000000
Apr 8 08:34:39 fuzz kernel: [18725.806203] GPR08: D6D64BE4 C0347A57 C0347A58 004625ED 24008022 00000000 00000000 41400000
Apr 8 08:34:39 fuzz kernel: [18725.806225] GPR16: 0171D4BC 0171D4C0 00240D18 00240D64 00240D1C 0171C478 0166F758 D6D64C04
Apr 8 08:34:39 fuzz kernel: [18725.806246] GPR24: D6D64000 D3C9A000 D7FEC870 D7FEC878 00000001 00009032 D7FEC868 D6D64000
Apr 8 08:34:39 fuzz kernel: [18725.806268] NIP [DA85008C] prism2sta_commsqual_defer+0x8c/0xf0 [prism2_usb]
Apr 8 08:34:39 fuzz kernel: [18725.806318] LR [DA850054] prism2sta_commsqual_defer+0x54/0xf0 [prism2_usb]
Apr 8 08:34:39 fuzz kernel: [18725.806343] Call Trace:
Apr 8 08:34:39 fuzz kernel: [18725.806350] [C1FD3EF0] [DA850054] prism2sta_commsqual_defer+0x54/0xf0 [prism2_usb] (unreliable)
Apr 8 08:34:39 fuzz kernel: [18725.806380] [C1FD3F00] [DA850550] prism2sta_processing_defer+0x460/0x5e0 [prism2_usb]
Apr 8 08:34:39 fuzz kernel: [18725.806408] [C1FD3F60] [C0040A98] worker_thread+0x188/0x230
Apr 8 08:34:39 fuzz kernel: [18725.806427] [C1FD3FC0] [C00463A8] kthread+0x108/0x110
Apr 8 08:34:39 fuzz kernel: [18725.806445] [C1FD3FF0] [C00128F8] kernel_thread+0x44/0x60
Apr 8 08:34:39 fuzz kernel: [18725.806465] Instruction dump:
Apr 8 08:34:39 fuzz kernel: [18725.806473] 2f830000 3c60da86 388495cc 3863a75c 409e0064 3d20c02b 815f0be4 81690624
Apr 8 08:34:39 fuzz kernel: [18725.806494] 312affff 7c095110 396b00fa 917f0bec <0f000000> 80880008 7d034378 48007479

[John Steele Scott (toojays)]

I should add that I have used this interface since with no problems; i.e. I haven't been able to reproduce this again.

[Niels Kristian Bech Jensen (nkbjensen)]

Original reporter can not reproduce the bug.

[Chuck Short (zulcss)]

http://marc2.theaimsgroup.com/?l=linux-wlan-devel&m=114022514719172&w=2

This might fix the problem

[Timothy Smith (tas50)]

Can the original reporter test this on Dapper 6.06.1 and/or Edgy Beta 1 so we can confirm it or close it.