Merge tag 'module-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus

Pull module patches from Rusty Russell, who really sells them:
 "Three trivial patches of no real utility.  Modules are boring."

But to make things slightly more exciting, he adds:
 "Fortunately David Howells is looking to change this, with his module
  signing patchset.  But that's for next merge window...

  Cheers,
  Rusty."

* tag 'module-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  Guard check in module loader against integer overflow
  modpost: use proper kernel style for autogenerated files
  modpost: Stop grab_file() from leaking filedescriptors if fstat() fails

kernel/module.c

@@ -2429,7 +2429,8 @@ static int copy_and_check(struct load_info *info,
 		goto free_hdr;
 	}
 
-	if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) {
+	if (hdr->e_shoff >= len ||
+	    hdr->e_shnum * sizeof(Elf_Shdr) > len - hdr->e_shoff) {
 		err = -ENOEXEC;
 		goto free_hdr;
 	}