#12070 NORM Not Tri: Runin kernel null pointer dereference in mmc_queue_thread on 1.75 / 12.1.0 os21

[Zarro Boogs per Child]

#12070: Runin kernel null pointer dereference in mmc_queue_thread on 1.75 / 12.1.0
os21
-----------------------+----------------------------------------------------
 Reporter:  greenfeld  |                 Owner:               
     Type:  defect     |                Status:  new          
 Priority:  normal     |             Milestone:  Not Triaged  
Component:  kernel     |               Version:  not specified
 Keywords:             |           Next_action:  diagnose     
 Verified:  0          |   Deployment_affected:               
Blockedby:             |              Blocking:               
-----------------------+----------------------------------------------------
 While running normal runin a XO-1.75 SKU 202 encountered a kernel null
 pointer dereference in the MMC subsystem after 10 suspend cycles and ~4.25
 hours of runtime.

 This was not seen while running normal runin on two XO-1.75s with serial
 (as well for a few days on another XO-1.75 without serial) for the past
 ~7.5 days with os20.

 {{{
 [12113.864102] PM: suspend of devices complete after 350.869 msecs
 [12113.864424] PM: late suspend of devices complete after 0.304 msecs
 [12113.865956] PM: early resume of devices complete after 0.535 msecs
 [12113.866119] mmp2_pm_finish
 [12113.866129] mmp2_pm_finish: Enable audio island
 [12113.866179] mmp2_pm_finish: Done
 [12114.184931] usb 1-1: reset high speed USB device number 2 using pxau2o-
 ehci
 [12114.925818] [galcore]: gpu_resume, 1042
 [12114.925827]
 [12115.095577] dcon_source_switch to CPU
 [12115.096214] PM: resume of devices complete after 1230.017 msecs
 [12115.181687] olpc-dcon: The CPU has control
 [12115.185774] Restarting tasks ... done.
 [12115.535683] mmc1: new SDIO card at address 0001
 [12116.991257] libertas_sdio mmc1:0001:1: (unregistered net_device):
 20:7c:8f:72:97:bd, fw 9.70.3p36, cap 0x000003a3
 [12117.013725] libertas_sdio mmc1:0001:1: wlan0: Marvell WLAN 802.11
 adapter
 [12117.081062] udevd[325]: renamed network interface wlan0 to eth0
 [12117.754663] ADDRCONF(NETDEV_UP): eth0: link is not ready
 [13173.081662] Unable to handle kernel NULL pointer dereference at virtual
 address 00000028
 [13173.096424] pgd = c0004000
 [13173.101153] [00000028] *pgd=00000000
 [13173.104735] Internal error: Oops: 17 [#1] PREEMPT
 [13173.109399] Modules linked in: mousedev syscopyarea sysfillrect
 sysimgblt fb_sys_fops sisusbvga libertas_sdio libertas psmouse siv120d
 ov7670 joydev mmp_camera videobuf2_dma_sg videobuf2_memops videobuf2_core
 [last unloaded: udlfb]
 [13173.129820] CPU: 0    Not tainted
 (3.0.19_xo1.75-20120803.1234.olpc.f49cd50 #1)
 [13173.137164] PC is at 0xebfffac0
 [13173.140288] LR is at mmc_queue_thread+0xe8/0xf0
 [13173.144788] pc : [<ebfffac0>]    lr : [<c0275fd0>]    psr: a00f0133
 [13173.144796] sp : ea921fd0  ip : 00000001  fp : 00000000
 [13173.156181] r10: e2860018  r9 : 00000000  r8 : 0a000014
 [13173.161369] r7 : e1510002  r6 : c0275ee8  r5 : 00000000  r4 : ea03dde4
 [13173.167847] r3 : 00000000  r2 : 00000000  r1 : ea8cf980  r0 : c2a20004
 [13173.174327] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA Thumb
 Segment kernel
 [13173.181753] Control: 10c5387d  Table: 2a3fc019  DAC: 00000015
 [13173.187456] Process mmcqd/2 (pid: 57, stack limit = 0xea9202f8)
 [13173.193330] Stack: (0xea921fd0 to 0xea922000)
 [13173.197661] 1fc0:                                     e1a03000 e59d0000
 e583011c e5dd2004
 [13173.205789] 1fe0: e5c32120 eaffffe9 e5906278 e1a01000 e3a03000 e1a02005
 e1a0000d eb007135
 [13173.213924] [<c0275fd0>] (mmc_queue_thread+0xe8/0xf0) from [<e1a01000>]
 (0xe1a01000)
 [13173.221613] Code: 5410 9097 2902 0078 (8d28) 64c1
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/12070>
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