kasan: remove kasan_find_vm_area() to prevent possible deadlock

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DEBIAN-CVE-2025-38510

In the Linux kernel, the following vulnerability has been resolved: kasan: remove kasanfindvmarea to prevent possible deadlock findvmarea couldn't be called in atomiccontext. If findvmarea is called to reports vm area information, kasan can trigger deadlock like: CPU0 CPU1 vmalloc; allocvmaparea;...