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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

** Tags added: kernel-da-key utopic

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https://bugs.launchpad.net/bugs/1340798

Title:
  ubuntu touch kernel oops / BUG on armhf image r126

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  [    0.700000] BUG: Bad page state in process modprobe  pfn:00000
  [    0.700000] page:81041000 count:0 mapcount:-127 mapping:  (null) index:0x0
  [    0.700000] page flags: 0x0()
  [    0.700000] Modules linked in:
  [    0.700000] [<80012bb8>] (unwind_backtrace+0x0/0x11c) from [<800a30a4>] (bad_page+0xd4/0x100)
  [    0.700000] [<800a30a4>] (bad_page+0xd4/0x100) from [<800a3194>] (free_pages_prepare+0xc4/0x184)
  [    0.700000] [<800a3194>] (free_pages_prepare+0xc4/0x184) from [<800a47d0>] (free_hot_cold_page+0x20/0x180)
  [    0.700000] [<800a47d0>] (free_hot_cold_page+0x20/0x180) from [<800ba568>] (do_wp_page.isra.71+0x730/0x780)
  [    0.700000] [<800ba568>] (do_wp_page.isra.71+0x730/0x780) from [<800bc388>] (handle_mm_fault+0xac/0xd8)
  [    0.700000] [<800bc388>] (handle_mm_fault+0xac/0xd8) from [<80414eb4>] (do_page_fault+0x168/0x398)
  [    0.700000] [<80414eb4>] (do_page_fault+0x168/0x398) from [<80008390>] (do_DataAbort+0x34/0x98)
  [    0.700000] [<80008390>] (do_DataAbort+0x34/0x98) from [<80413898>] (__dabt_svc+0x38/0x60)
  [    0.700000] Exception stack(0xeeb7de00 to 0xeeb7de48)
  [    0.700000] de00: 76fa722c 00000dcc 00000000 00000000 00000000 ee8391c0 eeba4d80 76fa7270
  [    0.700000] de20: 76f8e000 76fa722c ef107f00 76fa722c 00000000 eeb7de48 80113dc4 80235e70
  [    0.700000] de40: 20000013 ffffffff
  [    0.700000] [<80413898>] (__dabt_svc+0x38/0x60) from [<80235e70>] (__clear_user_std+0x34/0x64)
  [    0.710000] Disabling lock debugging due to kernel taint

  $ ps -ef|grep emulator
  james     3604 29836  0 16:16 pts/4    00:00:00 ubuntu-emulator run 11july2014-armhf --memory=2048
  james     3609  3604 99 16:16 pts/4    00:07:49 /usr/share/android/emulator/out/host/linux-x86/bin/emulator-arm -memory 2048 -skindir /usr/share/ubuntu-emulator/skins -skin EDGE -sysdir /home/james/.local/share/ubuntu-emulator/11july2014-armhf -kernel /home/james/.local/share/ubuntu-emulator/11july2014-armhf/ubuntu-kernel -ramdisk /home/james/.local/share/ubuntu-emulator/11july2014-armhf/ramdisk.img -data /home/james/.local/share/ubuntu-emulator/11july2014-armhf/userdata.img -system /home/james/.local/share/ubuntu-emulator/11july2014-armhf/system.img -sdcard /home/james/.local/share/ubuntu-emulator/11july2014-armhf/sdcard.img -cache /home/james/.local/share/ubuntu-emulator/11july2014-armhf/cache.img -force-32bit -no-snapstorage -gpu on -scale 1.0 -shell -no-jni -show-kernel -verbose -qemu -cpu cortex-a9

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