Merge tag 'modules-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu...

Pull module updates from Jessica Yu:

 - Harden CONFIG_STRICT_MODULE_RWX by rejecting any module that has
   SHF_WRITE|SHF_EXECINSTR sections

 - Remove and clean up nested #ifdefs, as it makes code hard to read

* tag 'modules-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  module: Harden STRICT_MODULE_RWX
  module: break nested ARCH_HAS_STRICT_MODULE_RWX and STRICT_MODULE_RWX #ifdefs

diff --cc kernel/module.c
index bca993c5f1bc7c6572700238464e86d58c5ffd63,70fc20583e6620eb0a42eb8e7de0e1d2567a471f..ef400c389f4963596ed5f0fcf5ce3c0490aa4886
--- 1/kernel/module.c
--- 2/kernel/module.c
+++ b/kernel/module.c
@@@ -2026,20 -2052,29 +2042,29 @@@ static void module_enable_nx(const stru
        frob_writable_data(&mod->init_layout, set_memory_nx);
  }
  
+ static int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
+                                      char *secstrings, struct module *mod)
+ {
+       const unsigned long shf_wx = SHF_WRITE|SHF_EXECINSTR;
+       int i;
+ 
+       for (i = 0; i < hdr->e_shnum; i++) {
+               if ((sechdrs[i].sh_flags & shf_wx) == shf_wx)
+                       return -ENOEXEC;
+       }
+ 
+       return 0;
+ }
+ 
  #else /* !CONFIG_STRICT_MODULE_RWX */
 -/* module_{enable,disable}_ro() stubs are in module.h */
  static void module_enable_nx(const struct module *mod) { }
- #endif /*  CONFIG_STRICT_MODULE_RWX */
- static void module_enable_x(const struct module *mod)
 +static void module_enable_ro(const struct module *mod, bool after_init) {}
+ static int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
+                                      char *secstrings, struct module *mod)
  {
-       frob_text(&mod->core_layout, set_memory_x);
-       frob_text(&mod->init_layout, set_memory_x);
+       return 0;
  }
- #else /* !CONFIG_ARCH_HAS_STRICT_MODULE_RWX */
- static void module_enable_nx(const struct module *mod) { }
- static void module_enable_x(const struct module *mod) { }
- #endif /* CONFIG_ARCH_HAS_STRICT_MODULE_RWX */
- 
+ #endif /*  CONFIG_STRICT_MODULE_RWX */
  
  #ifdef CONFIG_LIVEPATCH
  /*