This is a note to let you know that I've just added the patch titled
rtc: hctosys: Add missing range error reporting
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rtc-hctosys-add-missing-range-error-reporting.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7ce9a992ffde8ce93d5ae5767362a5c7389ae895 Mon Sep 17 00:00:00 2001
From: "Maciej W. Rozycki" <macro@xxxxxxxxxxxxxx>
Date: Mon, 5 Nov 2018 03:48:25 +0000
Subject: rtc: hctosys: Add missing range error reporting
From: Maciej W. Rozycki <macro@xxxxxxxxxxxxxx>
commit 7ce9a992ffde8ce93d5ae5767362a5c7389ae895 upstream.
Fix an issue with the 32-bit range error path in `rtc_hctosys' where no
error code is set and consequently the successful preceding call result
from `rtc_read_time' is propagated to `rtc_hctosys_ret'. This in turn
makes any subsequent call to `hctosys_show' incorrectly report in sysfs
that the system time has been set from this RTC while it has not.
Set the error to ERANGE then if we can't express the result due to an
overflow.
Signed-off-by: Maciej W. Rozycki <macro@xxxxxxxxxxxxxx>
Fixes: b3a5ac42ab18 ("rtc: hctosys: Ensure system time doesn't overflow time_t")
Cc: stable@xxxxxxxxxxxxxxx # 4.17+
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/rtc/hctosys.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/rtc/hctosys.c
+++ b/drivers/rtc/hctosys.c
@@ -50,8 +50,10 @@ static int __init rtc_hctosys(void)
tv64.tv_sec = rtc_tm_to_time64(&tm);
#if BITS_PER_LONG == 32
- if (tv64.tv_sec > INT_MAX)
+ if (tv64.tv_sec > INT_MAX) {
+ err = -ERANGE;
goto err_read;
+ }
#endif
err = do_settimeofday64(&tv64);
Patches currently in stable-queue which might be from macro@xxxxxxxxxxxxxx are
queue-4.9/rtc-hctosys-add-missing-range-error-reporting.patch
