exec: cleanup comments

Remove the second 'from'.
Replace 'backwords' with 'backwards'.
Replace 'visibile' with 'visible'.
Signed-off-by: Tom Rix <trix@redhat.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220211160940.2516243-1-trix@redhat.com

fs/exec.c

@@ -118,7 +118,7 @@ bool path_noexec(const struct path *path)
  * Note that a shared library must be both readable and executable due to
  * security reasons.
  *
- * Also note that we take the address to load from from the file itself.
+ * Also note that we take the address to load from the file itself.
  */
 SYSCALL_DEFINE1(uselib, const char __user *, library)
 {
@@ -542,7 +542,7 @@ static int copy_strings(int argc, struct user_arg_ptr argv,
 		if (!valid_arg_len(bprm, len))
 			goto out;
 
-		/* We're going to work our way backwords. */
+		/* We're going to work our way backwards. */
 		pos = bprm->p;
 		str += len;
 		bprm->p -= len;
@@ -1275,7 +1275,7 @@ int begin_new_exec(struct linux_binprm * bprm)
 
 	/*
 	 * Must be called _before_ exec_mmap() as bprm->mm is
-	 * not visibile until then. This also enables the update
+	 * not visible until then. This also enables the update
 	 * to be lockless.
 	 */
 	retval = set_mm_exe_file(bprm->mm, bprm->file);