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| author | Ben Hutchings <ben@decadent.org.uk> | 2012-01-10 15:11:02 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-25 17:24:33 -0800 |
| commit | 922d41ed4740408d2719a8c99d9f80138e562c03 (patch) | |
| tree | 07113f3ab10bf712f565b805344138dde2eb9c40 /drivers/rtc | |
| parent | f3a6e79c583423a55f7068ccdad732a5f4a0faad (diff) | |
| download | kernel_samsung_crespo-922d41ed4740408d2719a8c99d9f80138e562c03.zip kernel_samsung_crespo-922d41ed4740408d2719a8c99d9f80138e562c03.tar.gz kernel_samsung_crespo-922d41ed4740408d2719a8c99d9f80138e562c03.tar.bz2 | |
drivers/rtc/interface.c: fix alarm rollover when day or month is out-of-range
commit e74a8f2edb92cb690b467cea0ab652c509e9f624 upstream.
Commit f44f7f96a20a ("RTC: Initialize kernel state from RTC") introduced a
potential infinite loop. If an alarm time contains a wildcard month and
an invalid day (> 31), or a wildcard year and an invalid month (>= 12),
the loop searching for the next matching date will never terminate. Treat
the invalid values as wildcards.
Fixes <http://bugs.debian.org/646429>, <http://bugs.debian.org/653331>
Reported-by: leo weppelman <leoweppelman@googlemail.com>
Reported-by: "P. van Gaans" <mailme667@yahoo.co.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/interface.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index eb4c883..38d1dc7 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -227,11 +227,11 @@ int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) alarm->time.tm_hour = now.tm_hour; /* For simplicity, only support date rollover for now */ - if (alarm->time.tm_mday == -1) { + if (alarm->time.tm_mday < 1 || alarm->time.tm_mday > 31) { alarm->time.tm_mday = now.tm_mday; missing = day; } - if (alarm->time.tm_mon == -1) { + if ((unsigned)alarm->time.tm_mon >= 12) { alarm->time.tm_mon = now.tm_mon; if (missing == none) missing = month; |