CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's memory management, specifically in the handling of the `mem->altmap` assignment during device registration. If the `__add_memory_block()` function fails due to memory pressure, it can lead to a warning condition when the memory block is released, potentially impacting system stability. Organizations utilizing the Linux kernel, particularly those using the virtio-mem driver, should prioritize addressing this issue to ensure robust memory management and prevent potential disruptions.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: set mem->altmap after successful device registration If __add_memory_block() fails at xa_store() (under memory pressure for example), device_unregister() is called, which eventually triggers memory_block_release() with mem->altmap still set, causing a WARN_ON(mem->altmap). This was triggered by modifying virtio-mem driver. Fix this by delaying the assignment of mem->altmap until after __add_memory_block() has succeeded.
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