[pulseaudio-tickets] [Bug 88970] New: NameOwnerChanged handlers shouldn't assume that the bus is behaving correctly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88970

            Bug ID: 88970
           Summary: NameOwnerChanged handlers shouldn't assume that the
                    bus is behaving correctly
           Product: PulseAudio
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Keywords: love
          Severity: normal
          Priority: medium
         Component: modules
          Assignee: pulseaudio-bugs at lists.freedesktop.org
          Reporter: tanuk at iki.fi
        QA Contact: pulseaudio-bugs at lists.freedesktop.org
                CC: lennart at poettering.net

Our policy is that we don't trust any external processes to behave correctly.
This means that PulseAudio shouldn't crash or leak memory if some other process
does something unexpected.

NameOwnerChanged handlers, at least in bluez5-util and backend-ofono, assume
that the bus daemon is behaving correctly, i.e. that the old name passed via
the signal really is the old name. We should remember the owner name ourselves,
and complain loudly if the bus daemon disagrees about the old name.

Validating the old name is important, because if the bus incorrectly claims
that there was no prior owner (the old owner is an empty string), we should
clean up our state that we had for the old owner, but currently we don't.

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