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qga: fail early for invalid time

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It's possible to set system time with dates after 2070, however, it's
not possible to set the RTC. It has limitation to up to year
2070 (1970+100). In order to keep both clock in sync and before the
kernel complains on invalid values, bail out early.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Marc-André Lureau 2015-07-05 16:28:58 +02:00 committed by Michael Roth
parent d6c5528b0c
commit 00d2f3707a
1 changed files with 7 additions and 0 deletions
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7
qga/commands-posix.c
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@ -154,6 +154,8 @@ void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
/* If user has passed a time, validate and set it. */
if (has_time) {
GDate date = { 0, };
/* year-2038 will overflow in case time_t is 32bit */
if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
error_setg(errp, "Time %" PRId64 " is too large", time_ns);
@ -162,6 +164,11 @@ void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
tv.tv_sec = time_ns / 1000000000;
tv.tv_usec = (time_ns % 1000000000) / 1000;
g_date_set_time_t(&date, tv.tv_sec);
if (date.year < 1970 || date.year >= 2070) {
error_setg_errno(errp, errno, "Invalid time");
return;
}
ret = settimeofday(&tv, NULL);
if (ret < 0) {