linux-kernel - [PATCH] hide kernel addresses via %pK in /proc/timer

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Message-ID: <20110212032125.GA23571@outflux.net>
Date:	Fri, 11 Feb 2011 19:21:25 -0800
From:	Kees Cook <kees.cook@...onical.com>
To:	linux-kernel@...r.kernel.org
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <johnstul@...ibm.com>,
	Dan Rosenberg <drosenberg@...curity.com>,
	Eugene Teo <eugeneteo@...nel.org>
Subject: [PATCH] hide kernel addresses via %pK in /proc/timer_list

In the continuing effort to avoid kernel addresses leaking to unprivileged
users, this patch switches to %pK for /proc/timer_list reporting.

Signed-off-by: Kees Cook <kees.cook@...onical.com>
---
Please ignore Message-ID: <20110212031935.GA23210@...flux.net> which broke
the headers. I hate my MUA.

 kernel/time/timer_list.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index 32a19f9..3258455 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -41,7 +41,7 @@ static void print_name_offset(struct seq_file *m, void *sym)
 	char symname[KSYM_NAME_LEN];
 
 	if (lookup_symbol_name((unsigned long)sym, symname) < 0)
-		SEQ_printf(m, "<%p>", sym);
+		SEQ_printf(m, "<%pK>", sym);
 	else
 		SEQ_printf(m, "%s", symname);
 }
@@ -112,7 +112,7 @@ next_one:
 static void
 print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now)
 {
-	SEQ_printf(m, "  .base:       %p\n", base);
+	SEQ_printf(m, "  .base:       %pK\n", base);
 	SEQ_printf(m, "  .index:      %d\n",
 			base->index);
 	SEQ_printf(m, "  .resolution: %Lu nsecs\n",
-- 
1.7.2.3

-- 
Kees Cook
Ubuntu Security Team
--
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