Channel member self-reference causes uncontrolled recursion - #1345
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skarg merged 3 commits intoMay 13, 2026
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…rence check for channel members
…rences and improve error handling
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Pull request overview
This PR hardens the Channel object against unbounded recursive writes caused by self-referential entries in PROP_LIST_OF_OBJECT_PROPERTY_REFERENCES, preventing WriteProperty(PROP_PRESENT_VALUE) from re-entering the Channel write path indefinitely.
Changes:
- Adds a re-entrancy guard in
Channel_Write_Members()usingWrite_Statusto stop recursive member expansion. - Rejects direct self-references to the same Channel’s
PROP_PRESENT_VALUEwhen writingPROP_LIST_OF_OBJECT_PROPERTY_REFERENCES. - Refactors array-element decoding for
PROP_LIST_OF_OBJECT_PROPERTY_REFERENCESandPROP_CONTROL_GROUPSto use type-specific decoders and clearer error mapping.
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…lect success or failure of property writes
skarg
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May 13, 2026 18:03
skarg
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May 18, 2026
* Secured Channel object member self-reference that caused uncontrolled recursion. * Changed Channel property handling to use device object property reference and unsigned value specific decoders. * Fixed handling of Write_Status in Channel_Write_Members to properly reflect success or failure of property writes.
skarg
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May 26, 2026
* Fix uncontrolled recursion in Channel_Write_Members and add self-reference check for channel members
* Refactor Channel property handling to use device object property reference and unsigned value specific decoders
* Fix handling of Write_Status in Channel_Write_Members to properly reflect success or failure of property writes
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PROP_LIST_OF_OBJECT_PROPERTY_REFERENCES accepts a self-referential entry pointing back to the same Channel object's PROP_PRESENT_VALUE. A subsequent WriteProperty request to that Channel object's PROP_PRESENT_VALUE causes the implementation to re-expand the persisted member reference through the internal Device_Write_Property callback, creating an unbounded recursive loop:
Channel_Write_Property -> Channel_Present_Value_Write -> Channel_Write_Members -> Device_Write_Property -> Channel_Write_Property -> ...