linux-kernel - [PATCH RESEND 3/3] drivers/rtc/sunxi: Replace deprecated rtc_tm_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1432911877-607-3-git-send-email-xlpang@126.com>
Date:	Fri, 29 May 2015 23:04:37 +0800
From:	Xunlei Pang <xlpang@....com>
To:	linux-kernel@...r.kernel.org
Cc:	rtc-linux@...glegroups.com,
	Alessandro Zummo <a.zummo@...ertech.it>,
	John Stultz <john.stultz@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Xunlei Pang <pang.xunlei@...aro.org>,
	Carlo Caione <carlo.caione@...il.com>
Subject: [PATCH RESEND 3/3] drivers/rtc/sunxi: Replace deprecated rtc_tm_to_time()

From: Xunlei Pang <pang.xunlei@...aro.org>

sunxi_rtc_setalarm() uses deprecated rtc_tm_to_time(),
which will overflow in year 2106 on 32-bit machines.

This patch solves this by:
- Replacing rtc_tm_to_time() with rtc_tm_to_time64()

Also remove the unnecessary initial zeroing of some
local variables in sunxi_rtc_setalarm().

Cc: Carlo Caione <carlo.caione@...il.com>
Signed-off-by: Xunlei Pang <pang.xunlei@...aro.org>
---
 drivers/rtc/rtc-sunxi.c | 29 ++++++++++++++---------------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/drivers/rtc/rtc-sunxi.c b/drivers/rtc/rtc-sunxi.c
index 6e678fa..7f22753 100644
--- a/drivers/rtc/rtc-sunxi.c
+++ b/drivers/rtc/rtc-sunxi.c
@@ -269,14 +269,13 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
 	struct sunxi_rtc_dev *chip = dev_get_drvdata(dev);
 	struct rtc_time *alrm_tm = &wkalrm->time;
 	struct rtc_time tm_now;
-	u32 alrm = 0;
-	unsigned long time_now = 0;
-	unsigned long time_set = 0;
-	unsigned long time_gap = 0;
-	unsigned long time_gap_day = 0;
-	unsigned long time_gap_hour = 0;
-	unsigned long time_gap_min = 0;
-	int ret = 0;
+	u32 alrm;
+	time64_t time_set, time_now;
+	unsigned long time_gap;
+	unsigned long time_gap_day;
+	unsigned long time_gap_hour;
+	unsigned long time_gap_min;
+	int ret;
 
 	ret = sunxi_rtc_gettime(dev, &tm_now);
 	if (ret < 0) {
@@ -284,13 +283,18 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
 		return -EINVAL;
 	}
 
-	rtc_tm_to_time(alrm_tm, &time_set);
-	rtc_tm_to_time(&tm_now, &time_now);
+	time_set = rtc_tm_to_time64(alrm_tm);
+	time_now = rtc_tm_to_time64(&tm_now);
 	if (time_set <= time_now) {
 		dev_err(dev, "Date to set in the past\n");
 		return -EINVAL;
 	}
 
+	if (time_set > time_now + 255 * SEC_IN_DAY) {
+		dev_err(dev, "Day must be in the range 0 - 255\n");
+		return -EINVAL;
+	}
+
 	time_gap = time_set - time_now;
 	time_gap_day = time_gap / SEC_IN_DAY;
 	time_gap -= time_gap_day * SEC_IN_DAY;
@@ -299,11 +303,6 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
 	time_gap_min = time_gap / SEC_IN_MIN;
 	time_gap -= time_gap_min * SEC_IN_MIN;
 
-	if (time_gap_day > 255) {
-		dev_err(dev, "Day must be in the range 0 - 255\n");
-		return -EINVAL;
-	}
-
 	sunxi_rtc_setaie(0, chip);
 	writel(0, chip->base + SUNXI_ALRM_DHMS);
 	usleep_range(100, 300);
-- 
1.9.1


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/