proc: hide kernel addresses via %pK in /proc/<pid>/stack

This file is readable for the task owner. Hide kernel addresses from unprivileged users, leave them function names and offsets. Signed-off-by: Konstantin Khlebnikov <[email protected]> Acked-by: Kees Cook <[email protected]> Cc: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
RyanHsu · Mar 24, 2011 · 51e0314 · 51e0314
1 parent 523fb48
commit 51e0314
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/proc/base.c b/fs/proc/base.c
@@ -340,7 +340,7 @@ static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
 	save_stack_trace_tsk(task, &trace);
 
 	for (i = 0; i < trace.nr_entries; i++) {
-		seq_printf(m, "[<%p>] %pS\n",
+		seq_printf(m, "[<%pK>] %pS\n",
 			   (void *)entries[i], (void *)entries[i]);
 	}
 	kfree(entries);