Luca Boccassi
8e70913fc1
method_take_device() declares its local with
_cleanup_(session_device_freep), but the "device already taken" check
assigns a borrowed hashmap pointer to it and returns immediately:
sd = hashmap_get(s->devices, &dev);
if (sd)
return sd_bus_error_set(error, BUS_ERROR_DEVICE_IS_TAKEN, ...);
On that return the cleanup attribute runs session_device_free() on the
still-live entry that s->devices continues to own and use.
A subsequent ReleaseDevice then fails with BUS_ERROR_DEVICE_NOT_TAKEN
and the caller is left holding a revoked fd.
Follow-up for 360179ea46
System and Service Manager
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