From: Konstantin Khlebnikov <khlebnikov@openvz.org>
Date: Wed, 23 Mar 2011 23:42:48 +0000 (-0700)
Subject: proc: hide kernel addresses via %pK in /proc/<pid>/stack
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=51e031496d50f87ff519a63cfd4fc2f415f03336;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

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 <khlebnikov@openvz.org>
Acked-by: Kees Cook <kees.cook@canonical.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/proc/base.c b/fs/proc/base.c
index d49c4b5d2c3e..c3af15e9c070 100644
--- 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);