linux-kernel - [PATCH 0/2] eventpoll: Fix epoll

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <cover.1752824628.git.namcao@linutronix.de>
Date: Fri, 18 Jul 2025 09:52:27 +0200
From: Nam Cao <namcao@...utronix.de>
To: Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	Jan Kara <jack@...e.cz>,
	Shuah Khan <shuah@...nel.org>,
	Davidlohr Bueso <dave@...olabs.net>,
	Soheil Hassas Yeganeh <soheil@...gle.com>,
	Khazhismel Kumykov <khazhy@...gle.com>,
	Willem de Bruijn <willemb@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jens Axboe <axboe@...nel.dk>,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org
Cc: Nam Cao <namcao@...utronix.de>
Subject: [PATCH 0/2] eventpoll: Fix epoll_wait() report false negative

Hi,

While staring at epoll, I noticed ep_events_available() looks wrong. I
wrote a small program to confirm, and yes it is definitely wrong.

This series adds a reproducer to kselftest, and fix the bug.

Nam Cao (2):
  selftests/eventpoll: Add test for multiple waiters
  eventpoll: Fix epoll_wait() report false negative

 fs/eventpoll.c                                | 16 +------
 .../filesystems/epoll/epoll_wakeup_test.c     | 45 +++++++++++++++++++
 2 files changed, 47 insertions(+), 14 deletions(-)

-- 
2.39.5