workqueue: reject watchdog thresholds that overflow jiffies

The watchdog threshold is supplied in seconds but is multiplied by HZ
before being used as a jiffies interval. Reject values that exceed
MAX_JIFFY_OFFSET / HZ so the multiplication cannot wrap and the
time_after() comparisons remain within their supported range.

The check is performed before changing the threshold or watchdog timer.
Zero remains the value used to disable the watchdog.

Fixes: 82607adcf9cdf ("workqueue: implement lockup detector")
Signed-off-by: Jiacheng Xu <stitch@zju.edu.cn>
Signed-off-by: Tejun Heo <tj@kernel.org>

0 files changed, 0 insertions, 0 deletions