kernel-5.8.patch

   1 --- crash-7.2.8/memory_driver/crash.c~  2020-01-30 19:57:27.000000000 +0100
   2 +++ crash-7.2.8/memory_driver/crash.c   2020-08-16 18:41:10.187285717 +0200
   3 @@ -34,6 +34,7 @@
   4  #include <linux/mm.h>
   5  #include <linux/highmem.h>
   6  #include <linux/mmzone.h>
   7 +#include <linux/version.h>
   8
   9  extern int page_is_ram(unsigned long);
  10
  11 @@ -186,7 +186,11 @@
  12                 return -EFAULT;
  13         }
  14
  15 +#if LINUX_VERSION_CODE < KERNEL_VERSION(5,8,0)
  16         if (probe_kernel_write(vaddr, buffer, count)) {
  17 +#else
  18 +       if (copy_to_kernel_nofault(vaddr, buffer, count)) {
  19 +#endif
  20                 unmap_virtual(page);
  21                 return -EFAULT;
  22         }
  23 @@ -227,7 +227,11 @@
  24          * Use bounce buffer to bypass the CONFIG_HARDENED_USERCOPY
  25          * kernel text restriction.
  26          */
  27 +#if LINUX_VERSION_CODE < KERNEL_VERSION(5,8,0)
  28          if (probe_kernel_read(buffer, vaddr, count)) {
  29 +#else
  30 +        if (copy_from_kernel_nofault(buffer, vaddr, count)) {
  31 +#endif
  32                  unmap_virtual(page);
  33                  return -EFAULT;
  34          }