This is a note to let you know that I've just added the patch titled
3.4.y: timekeeping: fix 32-bit overflow in get_monotonic_boottime
to the 3.4-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:
3.4.y-timekeeping-fix-32-bit-overflow-in-get_monotonic_boottime.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From [email protected] Tue Feb 11 10:07:48 2014
From: John Stultz <[email protected]>
Date: Mon, 10 Feb 2014 13:16:29 -0800
Subject: 3.4.y: timekeeping: fix 32-bit overflow in get_monotonic_boottime
To: stable <[email protected]>
Cc: Colin Cross <[email protected]>, John Stultz <[email protected]>
Message-ID: <[email protected]>
From: Colin Cross <[email protected]>
fixed upstream in v3.6 by ec145babe754f9ea1079034a108104b6001e001c
get_monotonic_boottime adds three nanonsecond values stored
in longs, followed by an s64. If the long values are all
close to 1e9 the first three additions can overflow and
become negative when added to the s64. Cast the first
value to s64 so that all additions are 64 bit.
Signed-off-by: Colin Cross <[email protected]>
[jstultz: Fished this out of the AOSP commong.git tree. This was
fixed upstream in v3.6 by ec145babe754f9ea1079034a108104b6001e001c]
Signed-off-by: John Stultz <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
kernel/time/timekeeping.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1197,7 +1197,7 @@ void get_monotonic_boottime(struct times
} while (read_seqretry(&timekeeper.lock, seq));
set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec + sleep.tv_sec,
- ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec + nsecs);
+ (s64)ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec + nsecs);
}
EXPORT_SYMBOL_GPL(get_monotonic_boottime);
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/3.4.y-timekeeping-fix-32-bit-overflow-in-get_monotonic_boottime.patch
queue-3.4/rtc-cmos-add-an-alarm-disable-quirk.patch
queue-3.4/timekeeping-avoid-possible-deadlock-from-clock_was_set_delayed.patch
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