resource control: fix unsafe usage of time.After and timer.Reset (#8928)

close #8876

Signed-off-by: lhy1024 <admin@liudos.us>

Author: lhy1024

client/resource_group/controller/controller.go

@@ -294,7 +294,7 @@ func (c *ResourceGroupsController) Start(ctx context.Context) {
 						log.Warn("watch resource group meta failed", zap.Error(err))
 						timerutil.SafeResetTimer(watchRetryTimer, watchRetryInterval)
 						failpoint.Inject("watchStreamError", func() {
-							watchRetryTimer.Reset(20 * time.Millisecond)
+							timerutil.SafeResetTimer(watchRetryTimer, 20*time.Millisecond)
 						})
 					}
 				}
@@ -338,7 +338,7 @@ func (c *ResourceGroupsController) Start(ctx context.Context) {
 					watchMetaChannel = nil
 					timerutil.SafeResetTimer(watchRetryTimer, watchRetryInterval)
 					failpoint.Inject("watchStreamError", func() {
-						watchRetryTimer.Reset(20 * time.Millisecond)
+						timerutil.SafeResetTimer(watchRetryTimer, 20*time.Millisecond)
 					})
 					continue
 				}
@@ -374,7 +374,7 @@ func (c *ResourceGroupsController) Start(ctx context.Context) {
 					watchConfigChannel = nil
 					timerutil.SafeResetTimer(watchRetryTimer, watchRetryInterval)
 					failpoint.Inject("watchStreamError", func() {
-						watchRetryTimer.Reset(20 * time.Millisecond)
+						timerutil.SafeResetTimer(watchRetryTimer, 20*time.Millisecond)
 					})
 					continue
 				}
@@ -527,7 +527,7 @@ func (c *ResourceGroupsController) sendTokenBucketRequests(ctx context.Context,
 		ClientUniqueId:        c.clientUniqueID,
 	}
 	if c.ruConfig.DegradedModeWaitDuration > 0 && c.responseDeadlineCh == nil {
-		c.run.responseDeadline.Reset(c.ruConfig.DegradedModeWaitDuration)
+		timerutil.SafeResetTimer(c.run.responseDeadline, c.ruConfig.DegradedModeWaitDuration)
 		c.responseDeadlineCh = c.run.responseDeadline.C
 	}
 	go func() {

client/retry/backoff.go

@@ -24,6 +24,7 @@ import (
 	"github.com/pingcap/errors"
 	"github.com/pingcap/failpoint"
 	"github.com/pingcap/log"
+	"github.com/tikv/pd/client/timerutil"
 	"go.uber.org/zap"
 )
 
@@ -86,7 +87,7 @@ func (bo *Backoffer) Exec(
 		if after == nil {
 			after = time.NewTimer(currentInterval)
 		} else {
-			after.Reset(currentInterval)
+			timerutil.SafeResetTimer(after, currentInterval)
 		}
 		select {
 		case <-ctx.Done():