#9420 HIGH 1.5-F11: Crash on resume

[Zarro Boogs per Child]

#9420: Crash on resume
--------------------+-------------------------------------------------------
 Reporter:  cjb     |                 Owner:  dsaxena      
     Type:  defect  |                Status:  new          
 Priority:  high    |             Milestone:  1.5-F11      
Component:  kernel  |               Version:  not specified
 Keywords:          |           Next_action:  diagnose     
 Verified:  0       |   Deployment_affected:               
Blockedby:          |              Blocking:               
--------------------+-------------------------------------------------------
 {{{
 +r[  198.003378] BUG: unable to handle kernel NULL pointer dereference at
 00000048
 [  198.006938] IP: [<b05c226a>] uart_resume_port+0x5d/0x19c
 [  198.009580] *pde = 00000000
 [  198.010021] Oops: 0000 [#1] PREEMPT
 [  198.010021] last sysfs file: /sys/power/state
 [  198.010021] Modules linked in: fuse mousedev libertas_sdio libertas
 lib80211 sg [last unloaded: scsi_wait_]
 [  198.010021]
 [  198.010021] Pid: 2587, comm: bash Not tainted
 (2.6.30_xo1.5-20090724.1616.1.olpc.d56ad9b #1) XO
 [  198.010021] EIP: 0060:[<b05c226a>] EFLAGS: 00010246 CPU: 0
 [  198.010021] EIP is at uart_resume_port+0x5d/0x19c
 [  198.010021] EAX: 00000000 EBX: b09a7e40 ECX: 0000002c EDX: e9ab9920
 [  198.010021] ESI: b09a7e40 EDI: ea7f0e7c EBP: ea7f0e90 ESP: ea7f0e44
 [  198.010021]  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
 [  198.010021] Process bash (pid: 2587, ti=ea7f0000 task=ea3dc920
 task.ti=ea7f0000)
 [  198.010021] Stack:
 [  198.010021]  ea7f0e50 e9ab99ec e9ab9920 00000000 00000000 00000000
 00000000 00000000
 [  198.010021]  00000000 00000000 00000000 00000000 00000000 00000000
 b09a7e40 b0866a80
 [  198.010021]  b09a7e40 ffffffea e9ab9844 ea7f0e9c b05c5243 b0868be0
 ea7f0ea4 b05c5264
 [  198.010021] Call Trace:
 [  198.010021]  [<b05c5243>] ? serial8250_resume_port+0x5c/0x5f
 [  198.010021]  [<b05c5264>] ? serial8250_resume+0x1e/0x22
 [  198.010021]  [<b05c9f9c>] ? platform_drv_resume+0xc/0xe
 [  198.010021]  [<b05ca05b>] ? platform_pm_resume+0x1f/0x25
 [  198.010021]  [<b05cb9fa>] ? pm_op+0x31/0x4c
 [  198.010021]  [<b05cbf34>] ? device_resume+0x81/0x2cf
 [  198.010021]  [<b043ab37>] ? suspend_devices_and_enter+0x136/0x167
 [  198.010021]  [<b043acbe>] ? enter_state+0x12e/0x1a5
 [  198.010021]  [<b043adce>] ? state_store+0x99/0xb1
 [  198.010021]  [<b043ad35>] ? state_store+0x0/0xb1
 [  198.010021]  [<b0545445>] ? kobj_attr_store+0x1a/0x22
 [  198.010021]  [<b04ac7fe>] ? sysfs_write_file+0xab/0xdd
 [  198.010021]  [<b04ac753>] ? sysfs_write_file+0x0/0xdd
 [  198.010021]  [<b0471b1a>] ? vfs_write+0x8c/0x108
 [  198.010021]  [<b047204b>] ? sys_write+0x3b/0x60
 [  198.010021]  [<b0402934>] ? sysenter_do_call+0x12/0x26
 [  198.010021] Code: 16 00 8d 55 c0 31 c0 89 55 b4 b9 0b 00 00 00 89 d7 f3
 ab 8b 46 68 8b 40 2c 85 c0 89 45 c
 [  198.010021] EIP: [<b05c226a>] uart_resume_port+0x5d/0x19c SS:ESP
 0068:ea7f0e44
 [  198.010021] CR2: 0000000000000048
 [  198.364746] ---[ end trace ff2b92e4bddea32c ]---
 [  198.391014] ata1.00: ACPI cmd ef/03:0c:00:00:00:a0 filtered out
 [  198.419024] ata1.00: ACPI cmd ef/03:22:00:00:00:a0 filtered out
 [  198.460269] ata1.00: configured for UDMA/100
 [  199.000068] olpc-dcon:  Timeout entering CPU mode; expect a screen
 glitch.
 [  199.032384] olpc-dcon: The CPU has control
 }}}

 And the system's hung.  Is very repeatable with a suspend/resume loop.

-- 
Ticket URL: <http://dev.laptop.org/ticket/9420>
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