package/kernel/linux/hotfix-execmem.patch

   1 # --- T2-COPYRIGHT-BEGIN ---
   2 # t2/package/*/linux/hotfix-execmem.patch
   3 # Copyright (C) 2024 - 2025 The T2 SDE Project
   4 # SPDX-License-Identifier: GPL-2.0 or patched project license
   5 # --- T2-COPYRIGHT-END ---
   6
   7 Since f6bec26c0a7 (mm/execmem, arch: convert simple overrides of module_alloc to execmem)
   8 sparc was accidentaly changed to map module memory w/ VM_FLUSH_RESET_PERMS, causing
   9 page tables or memory corruption on each module load, making it even nearly impossible
  10 to even successfully boot sun4u systems.
  11
  12 Signed-off-by: René Rebe <rene@exactcode.de>
  13
  14 index 0c4b36bc6d10..64404c517e93 100644
  15 --- linux-6.13/mm/execmem.c.orig        2025-01-20 23:15:27.093329248 +0100
  16 +++ linux-6.13/mm/execmem.c     2025-01-20 23:22:16.633328514 +0100
  17 @@ -361,6 +361,9 @@
  18         struct execmem_range *range = &execmem_info->ranges[type];
  19         bool use_cache = range->flags & EXECMEM_ROX_CACHE;
  20         unsigned long vm_flags = VM_FLUSH_RESET_PERMS;
  21 +#ifdef __sparc__
  22 +       vm_flags = 0;
  23 +#endif
  24         pgprot_t pgprot = range->pgprot;
  25         void *p;
  26
  27