commit 37752eaad6de4037010db3facd196d5b13650ae8
author Al Viro <viro@zeniv.linux.org.uk> Wed Sep 02 11:30:48 2020 -0400
committer Prashantsinh Parmar <prashantsinh.parmar@fairphone.partners> Sat Nov 13 13:53:48 2021 +0530
tree 8277c7e6e3b6b7014fc630f4d3708be2a5407b63
parent 497c3cb980a628d5100e10278822a0730d8a2732

fix regression in "epoll: Keep a reference on files added to the check list"

[ Upstream commit 77f4689de17c0887775bb77896f4cc11a39bf848 ]

epoll_loop_check_proc() can run into a file already committed to destruction;
we can't grab a reference on those and don't need to add them to the set for
reverse path check anyway.

Tested-by: Marc Zyngier <maz@kernel.org>
Fixes: a9ed4a6560b8 ("epoll: Keep a reference on files added to the check list")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Issue: FP3SEC-128
(cherry picked from commit 8238ee93a30a5ff6fc75751e122a28e0d92f3e12)
Change-Id: I48d8321f802dc1634a8a9fc9d79a6a975e7de969