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Subject: [PATCH] proc: hide kernel addresses via %pK in /proc/<pid>/stack
To: linux-kernel@vger.kernel.org
From: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Kees Cook <kees.cook@canonical.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Alexey Dobriyan <adobriyan@gmail.com>
Date: Mon, 21 Feb 2011 22:11:21 +0300
Message-ID: <20110221191121.5764.81241.stgit@localhost6>
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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>
---
 fs/proc/base.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9d096e8..4fa8dc6 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);

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