linux-kernel - [PATCH 4.14 04/94] tools/power turbostat: fix possible sprintf buffer overflow

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Message-Id: <20181008175605.268740961@linuxfoundation.org>
Date:   Mon,  8 Oct 2018 20:30:45 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Len Brown <len.brown@...el.com>,
        Alakesh Haloi <alakeshh@...zon.com>
Subject: [PATCH 4.14 04/94] tools/power turbostat: fix possible sprintf buffer overflow

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Len Brown <len.brown@...el.com>

commit 46c2797826cc6d1ae36fcbd966e76f9fa1907eef upstream.

Signed-off-by: Len Brown <len.brown@...el.com>
Cc: Alakesh Haloi <alakeshh@...zon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 tools/power/x86/turbostat/turbostat.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -1485,7 +1485,7 @@ int get_mp(int cpu, struct msr_counter *
 		if (get_msr(cpu, mp->msr_num, counterp))
 			return -1;
 	} else {
-		char path[128];
+		char path[128 + PATH_BYTES];
 
 		if (mp->flags & SYSFS_PERCPU) {
 			sprintf(path, "/sys/devices/system/cpu/cpu%d/%s",