[stable] locks: fix a potential use-after-free problem when wakeup a waiter

Ben Hutchings
2020-03-18T22:09:25Z

This commit (included in 5.6-rc5) seems to be needed for 5.4 and 5.5
branches:

commit 6d390e4b5d48ec03bb87e63cf0a2bff5f4e116da
Author: yangerkun <yangerkun@huawei.com>
Date: Wed Mar 4 15:25:56 2020 +0800

locks: fix a potential use-after-free problem when wakeup a waiter

I'm a bit surprised that it hasn't yet been applied, while some fixes
from 5.6-rc6 have.

Ben.

--
Ben Hutchings, Software Developer Codethink Ltd
https://www.codethink.co.uk/ Dale House, 35 Dale Street
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