Fix unprotected access to QDBusPendingCallPrivate::pending.

In QDBusConnectionPrivate::waitForFinished() pcall->pending was used
after the protection by pcall->mutex was released. A simultaneous
call to QDBusConnectionPrivate::processFinishedCall() was able
to reset pcall->pending to null before it was used for the
q_dbus_pending_call_block(pcall->pending) call.

Fixed by releasing (and setting to 0) of pcall->pending in
processFinishedCall() only in case no one is waiting yet, otherwise
release pcall->pending by the first thread waiting in waitForFinished().

There is still a race condition about deleting QDBusPendingCallPrivate
(too early) which will be fixed in the next two commits.

Task-number: QTBUG-27809
Change-Id: I040173810ad90653fe1bd1915f22d8dd70d47d8c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions