linux-kernel - Re: [possible bug] missed wakeup in do

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-prev] [day] [month] [year] [list]

Message-ID: <CAHk-=wg2MC-MOmWa5wy-djNm+FCj6s4484UFncprHZ=--ZGVpg@mail.gmail.com>
Date:   Sat, 4 Sep 2021 11:21:17 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [possible bug] missed wakeup in do_sigtimedwait()?

On Sat, Sep 4, 2021 at 11:13 AM Al Viro <viro@...iv.linux.org.uk> wrote:
>
> Thanks.  AFAICS, it's this logics in __schedule():
>                 if (signal_pending_state(prev_state, prev)) {
>                         WRITE_ONCE(prev->__state, TASK_RUNNING);

Exactly. As you note, it also handles the WAKEKILL case which is
basically equivalent (just for the "I can't take normal signals, but
I'm ok dying" case)

            Linus