kernel-packages team mailing list archive

[Sergio Callegari <sergio.callegari@xxxxxxxxx>]

Ubuntu bug is buggy and hangs all the time with "You are already logged
in You are already logged in as Sergio Callegari. If this is not you,
please log out now." To make it work, you need to log-out and rerun
apport-collect, not nice. Plus, I am now trying 3.10.3 and obviously
apport is unhappy with it.  Please save me the reboot.

Really, there should be no need of anything else. From previous
messages: bug is acknowledged on the LKML and the linux-bluetooth ML and
patches  are already floating around.   All kernels from 3.8 to 3.10.3
are affected. Bug is due to the introduction of the tty_port data
structure for which rfcomm has never been updated.  Thus, there is
nothing that can be bisected and reverted to fix. And as already
mentioned above, the crash log is meaningless, since there is a massive
memory corruption.

-- 
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https://bugs.launchpad.net/bugs/1165433

Title:
  Kernel 3.8.x panics on bluetooth DUN disconnect

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Issue is obviously in the kernel that should not panic in any circumnstances.
  This bug is seen on quantal using the kernel from PPA mainline. Tested with 3.8.0 to 3.8.6.
  Since 3.8.x is going to be the raring kernel I believe that this should definitely be fixed before raring is shipped.

  Seen on:

  DELL E6500 with kubuntu quantal 12.10 64 bit and as said, kernel 3.8.6 from the mainline ppa.
  The machine has a Dell Computer Corp. Wireless 370 Bluetooth Mini-card (connected via an internal usb connection).

  The issue is shown when connecting to the internet via a Samsung Galaxy S plus phone, using a bluetooth DUN connection.
  It is reproducible every time.

  How to reproduce:

  1) Use the bluetooth applet to discover the phone and associate to it.
  2) Use network manager to setup a DUN connection with the phone through your APN
  3) Connect to the internet via bluetooth DUN (connection works perfectly)
  4) Disconnect from the network manager.

  At the same time you disconnect, the GUI session is terminated and the
  kernel panics, briefly showing a panic log on the screen.

  Note that:

  a) The issue is not present using the standard ubuntu quantal kernel
  b) The issue is not present using kernels from the mainline ppa before 3.8 (e.g., 3.7.x is fine for all x)
  c) The issue is not present when connecting to the internet using a USB mobile dongle (e.g. Huawei usb key)

  This looks pretty serious to me: kernel does not sync when panicing
  and there is a serious risk of data loss; connecting to the internet
  via a smart phone using bluetooth DUN seems to be something that one
  should take for granted on any modern OS. Furthermore, points a) and
  b) above show that this is a *regression* over previous kernels.

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