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[AUTOSEL,for,4.15,27/78] cros_ec: fix nul-termination for firmware build info

Message ID 20180308045525.7662-27-alexander.levin@microsoft.com
State New
Headers show
Series [AUTOSEL,for,4.15,01/78] ipmi_si: Fix error handling of platform device | expand

Commit Message

Sasha Levin March 8, 2018, 4:56 a.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>


[ Upstream commit 50a0d71a5d20e1d3eff1d974fdc8559ad6d74892 ]

As gcc-8 reports, we zero out the wrong byte:

drivers/platform/chrome/cros_ec_sysfs.c: In function 'show_ec_version':
drivers/platform/chrome/cros_ec_sysfs.c:190:12: error: array subscript 4294967295 is above array bounds of 'uint8_t[]' [-Werror=array-bounds]

This changes the code back to what it did before changing to a
zero-length array structure.

Fixes: a841178445bb ("mfd: cros_ec: Use a zero-length array for command data")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Signed-off-by: Benson Leung <bleung@chromium.org>

Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>

---
 drivers/platform/chrome/cros_ec_sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.14.1
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Patch

diff --git a/drivers/platform/chrome/cros_ec_sysfs.c b/drivers/platform/chrome/cros_ec_sysfs.c
index f3baf9973989..24f1630a8b3f 100644
--- a/drivers/platform/chrome/cros_ec_sysfs.c
+++ b/drivers/platform/chrome/cros_ec_sysfs.c
@@ -187,7 +187,7 @@  static ssize_t show_ec_version(struct device *dev,
 		count += scnprintf(buf + count, PAGE_SIZE - count,
 				   "Build info:    EC error %d\n", msg->result);
 	else {
-		msg->data[sizeof(msg->data) - 1] = '\0';
+		msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
 		count += scnprintf(buf + count, PAGE_SIZE - count,
 				   "Build info:    %s\n", msg->data);
 	}