On Wed, 6 Jan 2016 22:17:32 -0800 Andrey Smirnov <andrew.smirnov@xxxxxxxxx> wrote: > RTC drivers rely on rtc_valid_tm() in order to make sure that no bogus > values from uninitialized HW registers get passed to the uppper layers. > > A somewhat contrived way to reproduce this problem with DS1307 RTC > would be to do the following: > > > rtc_write -b <bus> -a <addr> -r 3 0x00 rtc_write? Do you mean i2c_write here? > > hwclock > > Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx> > --- > drivers/rtc/rtc-lib.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c > index 1b23458..83d8045 100644 > --- a/drivers/rtc/rtc-lib.c > +++ b/drivers/rtc/rtc-lib.c > @@ -90,6 +90,8 @@ int rtc_valid_tm(struct rtc_time *tm) > { > if (tm->tm_year < 70 > || ((unsigned)tm->tm_mon) >= 12 > + || tm->tm_wday < 0 > + || tm->tm_wday > 6 > || tm->tm_mday < 1 > || tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + 1900) > || ((unsigned)tm->tm_hour) >= 24 > -- > 2.5.0 > > _______________________________________________ > barebox mailing list > barebox@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/barebox -- Best regards, Antony Pavlov _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox