a2dd39b4cb
sd-bus connection is cached by the two pam modules globally, but this can lead to issues due to hashmaps (used by sd-bus) using a global static variable for the shared hash key, which is different per module as both modules are loaded in the same process. This happens because the sd-bus object is create in one module, but used in the other, so global state does not match. Use a different pam cache identifier for the sd-bus pointer, so that each module uses a different sd-bus connection as a workaround. Fixes https://github.com/systemd/systemd/issues/27216 Fixes https://github.com/systemd/systemd/issues/17266
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