package/kernel/linux/hotfix-execmem.patch

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   2 # T2 SDE: package/*/linux/hotfix-execmem.patch
   3 # Copyright (C) 2024 The T2 SDE Project
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  13
  14 Since f6bec26c0a7 (mm/execmem, arch: convert simple overrides of module_alloc to execmem)
  15 sparc was accidentaly changed to map module memory w/ VM_FLUSH_RESET_PERMS, causing
  16 page tables or memory corruption on each module load, making it even nearly impossible
  17 to even successfully boot sun4u systems.
  18
  19 Signed-off-by: René Rebe <rene@exactcode.de>
  20
  21 index 0c4b36bc6d10..64404c517e93 100644
  22 --- a/mm/execmem.c
  23 +++ b/mm/execmem.c
  24 @@ -17,6 +17,9 @@ static struct execmem_info default_execmem_info __ro_after_init;
  25  {
  26         bool kasan = range->flags & EXECMEM_KASAN_SHADOW;
  27         unsigned long vm_flags  = VM_FLUSH_RESET_PERMS;
  28 +#ifdef __sparc__
  29 +       vm_flags = 0;
  30 +#endif
  31         gfp_t gfp_flags = GFP_KERNEL | __GFP_NOWARN;
  32         unsigned long start = range->start;
  33         unsigned long end = range->end;