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Prevent timer leaks in Workerpool and others (#11333)

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There is a potential memory leak in `Workerpool` due to the intricacies of
`time.Timer` stopping.

Whenever a `time.Timer` is `Stop`ped its channel must be cleared using a
`select` if the result of the `Stop()` is `false`.

Unfortunately in `Workerpool` these were checked the wrong way round.

However, there were a few other places that were not being checked.

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
zeripath 2020-05-08 16:46:05 +01:00 • committed by GitHub
parent 6f6edb8fab
commit c58bc4bf80
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5 changed files with 32 additions and 29 deletions
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12
cmd/hook.go
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@ -19,6 +19,7 @@ import (
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/private"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
"github.com/urfave/cli"
)
@ -113,15 +114,8 @@ func (d *delayWriter) Close() error {
if d == nil {
return nil
}
stopped := d.timer.Stop()
if stopped {
return nil
}
select {
case <-d.timer.C:
default:
}
if d.buf == nil {
stopped := util.StopTimer(d.timer)
if stopped || d.buf == nil {
return nil
}
_, err := d.internal.Write(d.buf.Bytes())