binder: avoid race conditions when enqueuing txn
Currently, the transaction complete work item is queued after the transaction. This means that it is possible for the transaction to be handled and a reply to be enqueued in the current thread before the transaction complete is enqueued, which violates the protocol with userspace who may not expect the transaction complete. Fixed by always enqueing the transaction complete first. Also, once the transaction is enqueued, it is unsafe to access since it might be freed. Currently, t->flags is accessed to determine whether a sync wake is needed. Changed to access tr->flags instead. Signed-off-by: NTodd Kjos <tkjos@google.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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