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CVE-2022-50044 is a race condition in the Linux kernel QRTR-over-MHI transport initialization path. The MHI channel was enabled through mhi_prepare_for_transfer_autoqueue() before the QRTR endpoint had been created and registered. Because MHI can deliver an interrupt or event immediately upon enablement, qcom_mhi_qrtr_dl_callback() could execute before driver data was associated with the MHI device, causing the event to be discarded, or after driver data association but before QRTR endpoint registration. In the latter case, the callback can invoke qrtr_endpoint_post() on an uninitialized endpoint, resulting in an invalid pointer access and kernel panic. The upstream fix defers MHI transfer auto-queueing until after QRTR endpoint creation.
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A Linux kernel QRTR networking flaw involving MHI channel startup ordering after endpoint creation.
A Linux kernel QRTR networking issue concerning initialization of an MHI channel after endpoint creation.
A Linux kernel QRTR-over-MHI race condition: MHI events may arrive before qdev driver data and the QRTR endpoint are initialized. This can prevent QRTR service enumeration or cause a kernel panic. The fix moves MHI transfer preparation until after endpoint creation.
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