Linux Kernel Vulnerability Related to Module Load Time in LoongArch Architecture

CVE-2025-39767

What is CVE-2025-39767?

In the Linux kernel, a performance-related vulnerability has been identified that affects the loading of modules, particularly on the LoongArch architecture. Enabling certain configurations, such as CONFIG_KASAN and CONFIG_PREEMPT_VOLUNTARY_BUILD, can lead to a soft deadlock condition during module loading. This occurs due to inefficient counting algorithms when determining the number of Procedure Linkage Tables (PLTs) and Global Offset Tables (GOTs) needed for relocations. By optimizing the sorting of the relocation list, the loading process significantly reduces module load times and alleviates the resulting CPU occupation issues. The applied patch has resolved the soft deadlock, ensuring smoother kernel operations without 'Call Trace' logs.

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