kernel-packages team mailing list archive

[Tyson Clugg <1362538@xxxxxxxxxxxxxxxxxx>]

That's odd - the error had been annoying me every boot for months has
now gone, even after "apt-get --purge bluez-dbg; reboot" and then the
same for bluez-dbg.  To be clear, the last time the error appeared was
at boot time before installing both bluez-dbg and libbluetooth3-dbg as
per comment #7.

I tried both warm and cold booting (at *every* reboot I've mentioned in
this and the other comment) to see if it was some weird state the BIOS
was setting on the hardware, but it's not apparent that warm versus cold
booting is making any difference.

It appears to me that rebooting with debug libraries installed has
either allowed the failing branch of code to complete without error, or
caused some alternate branch of code to be executed instead. In either
case, the lack of crashing suggests that bluez has saved it's new state
in some as yet unresolved location - does bluez keep/alter state
anywhere in the code, or am I getting carried away here?

Marcos K: Can you try installing just libbluetooth3-dbg and rebooting?
Submit the stack trace if the error persists, then try installing bluez-
dbg and rebooting again once again submitting the stack trace if it
crashes?

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Packages, which is subscribed to bluez in Ubuntu.
https://bugs.launchpad.net/bugs/1362538

Title:
  bluetoothd crashed with SIGSEGV in server_disconnect()

Status in “bluez” package in Ubuntu:
  Confirmed

Bug description:
  at startup

  ProblemType: Crash
  DistroRelease: Ubuntu 14.10
  Package: bluez 4.101-0ubuntu19
  ProcVersionSignature: Ubuntu 3.16.0-10.15-generic 3.16.1
  Uname: Linux 3.16.0-9-generic x86_64
  ApportVersion: 2.14.6-0ubuntu2
  Architecture: amd64
  Date: Thu Aug 21 02:15:28 2014
  ExecutablePath: /usr/sbin/bluetoothd
  InterestingModules: bnep rfcomm btusb bluetooth
  MachineType: Acer Aspire V5-551
  ProcCmdline: /usr/sbin/bluetoothd
  ProcEnviron:
   PATH=(custom, no user)
   TERM=linux
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-10-generic.efi.signed root=UUID=bdba8918-495e-47cf-bc7c-8dc076ec2212 ro text nomodeset noplymouth console=tty1 radeon.dpm=1 acpi_backlight=vendor nomdmonddf nomdmonisw
  SegvAnalysis:
   Segfault happened at: 0x7fbb97d33e1c <__GI___libc_free+28>:	mov    -0x8(%rdi),%rax
   PC (0x7fbb97d33e1c) ok
   source "-0x8(%rdi)" (0x00000019) not located in a known VMA region (needed readable region)!
   destination "%rax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: bluez
  StacktraceTop:
   __GI___libc_free (mem=0x21) at malloc.c:2929
   ?? ()
   ?? ()
   ?? ()
   dbus_connection_try_register_fallback () from /lib/x86_64-linux-gnu/libdbus-1.so.3
  Title: bluetoothd crashed with SIGSEGV in __GI___libc_free()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  dmi.bios.date: 04/19/2013
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V2.16
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Havok
  dmi.board.vendor: Acer
  dmi.board.version: Type2 - A01 Board Version
  dmi.chassis.type: 10
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.16:bd04/19/2013:svnAcer:pnAspireV5-551:pvrV2.16:rvnAcer:rnHavok:rvrType2-A01BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
  dmi.product.name: Aspire V5-551
  dmi.product.version: V2.16
  dmi.sys.vendor: Acer
  hciconfig:
   hci0:	Type: BR/EDR  Bus: USB
   	BD Address: F4:B7:E2:88:01:EE  ACL MTU: 1022:8  SCO MTU: 183:5
   	UP RUNNING PSCAN ISCAN 
   	RX bytes:1224 acl:0 sco:0 events:74 errors:0
   	TX bytes:2300 acl:0 sco:0 commands:74 errors:0
  mtime.conffile..etc.bluetooth.audio.conf: 2014-06-10T23:38:40.331777

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