Bug#968940: linux: please add patch to support virtualbox on kernel 5.8

[Gianfranco Costamagna <locutusofborg@debian.org>]

Source: linux
Version: 5.8.3-1~exp1
Severity: serious
tags: patch

Hello, as explained on upstream ticket [1], the new kernel broke virtualbox, and the only fix that has been found
so far is to export map_kernel_range and __get_vm_area_caller to modules

https://www.virtualbox.org/attachment/ticket/19644/local_patches

This trivial patch does the trick
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -325,6 +325,7 @@ int map_kernel_range(unsigned long start, unsigned long size, pgprot_t prot,
        flush_cache_vmap(start, start + size);
        return ret;
 }
+EXPORT_SYMBOL(map_kernel_range);
	 
 int is_vmalloc_or_module_addr(const void *x)
 {
@@ -2130,6 +2131,7 @@ struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
        return __get_vm_area_node(size, 1, flags, start, end, NUMA_NO_NODE,
                                  GFP_KERNEL, caller);
 }
+EXPORT_SYMBOL(__get_vm_area_caller);
 
 /**
  * get_vm_area - reserve a contiguous kernel virtual area


[1] https://www.virtualbox.org/ticket/19644

thanks

Gianfranco