[Bug 202345] New: bluetoothd can end up with a corrupted DBus object path

[Bug 202345] New: bluetoothd can end up with a corrupted DBus object path

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202345

            Bug ID: 202345
           Summary: bluetoothd can end up with a corrupted DBus object
                    path
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.9.130
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: kai.ruhnau@live.com
        Regression: No

Three times during the past few days, I was able to end up with a bluetoothd
daemon that reported a corrupted DBus object path (note the ']' character where
'_' should be)

# busctl tree org.bluez
Failed to introspect object /org/bluez/hci0/dev_4F_D1_9D_30]B7_8D of service
org.bluez: Invalid argument
└─/org
  └─/org/bluez
    └─/org/bluez/hci0
[…]


GetManagedObjects works fine and reports the correct path:
# busctl call org.bluez / org.freedesktop.DBus.ObjectManager GetManagedObjects
[…] "/org/bluez/hci0/dev_4F_D1_9D_30_B7_8D" 3
"org.freedesktop.DBus.Introspectable" 0 "org.bluez.Device1" 11 "Address" s
"4F:D1:9D:30:B7:8D" "AddressType" s "random" "Alias" s "4F-D1-9D-30-B7-8D"
"Paired" b false "Trusted" b false "Blocked" b false "LegacyPairing" b false
"Connected" b false "UUIDs" as 0 "Adapter" o "/org/bluez/hci0"
"ServicesResolved" b false "org.freedesktop.DBus.Properties" 0 […]

Querying a property doesn't work, though:
# busctl get-property org.bluez /org/bluez/hci0/dev_4F_D1_9D_30_B7_8D
org.bluez.Device1 Address
Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties"
doesn't exist

And that last behavior then crashes my application.

The most weird thing is that the object path corruption has been consistently
at the fifth underscore (between the fourth and fifth address byte), but with
different characters: a 'Y' (resulting in
'/org/bluez/hci0/dev_xx_xx_xx_xxYxx_xx') , a '^', and today the above ']'.

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