Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > gnu.bash.bug > #16203

Re: process substitution fd lifetime race condition

Path csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail
From "Jason A. Donenfeld" <Jason@zx2c4.com>
Newsgroups gnu.bash.bug
Subject Re: process substitution fd lifetime race condition
Date Mon, 20 Apr 2020 15:43:38 -0600
Lines 11
Approved bug-bash@gnu.org
Message-ID <mailman.836.1587419036.3066.bug-bash@gnu.org> (permalink)
References <20200420051508.GA2359844@zx2c4.com> <7496b183-2db3-6c03-6074-928adcd08f45@case.edu> <CAHmME9p_n_W6721mY4=MWpKJvDTNsvEQbA9EB5chsrwyOzSgqw@mail.gmail.com> <CAHmME9o+guCLQsOUxfhrwY83jRT04TqrNU-dVYPi0f=PdEv=kg@mail.gmail.com>
NNTP-Posting-Host lists.gnu.org
Mime-Version 1.0
Content-Type text/plain; charset="UTF-8"
X-Trace usenet.stanford.edu 1587419036 17830 209.51.188.17 (20 Apr 2020 21:43:56 GMT)
X-Complaints-To action@cs.stanford.edu
Cc bug-bash@gnu.org
To Chester Ramey <chet.ramey@case.edu>
Envelope-to bug-bash@gnu.org
DKIM-Signature v=1; a=rsa-sha1; c=relaxed; d=zx2c4.com; h=mime-version :references:in-reply-to:from:date:message-id:subject:to:cc :content-type; s=mail; bh=jy9E1iuAkaCG4ZNuE5dYGpln+bM=; b=VwZ3rL NWJfRT1062cKY0W2NABzEwPslU8vy17jGz1tkunThMPM5bROdhRhnGdhnz+DJx6N S0MVAAKySR8H+C5i0rRuag6vxBN5q019WqkFAqDbRrjFmRhjy8p4hjINyeUmWp8m eYjL66O9SndwHhQ/OAGForMc1AtcVFV+guihQw22TcYwKQiLf19JN8fDxJuyXhKh gXCXf1WNqNKlyTjNatwZf1L6i8E3RpZ1EX6tTwRU0k7hCRIH1aQSrHvjur8VZMq7 UrrMgMUU2J7Wc5kG5PYeIKb6az1VMbwa/tHyGRkOI4uOMUtCmrLozpp1GVzzOjJY DYzkFtmzTwMsfg6g==
X-Gm-Message-State AGi0PuYLDGXaQxA7Q3iZinTprr0qCLG+iI430e3/fsu2OrfwlD6Bo9uE zGOc8D5B4p5mFWdZaZnixYU0uKBvX0SXwgmZ2PA=
X-Google-Smtp-Source APiQypKhgfOsrO8IU543KMfc+hWzjzjL7kkERYj/XXdg5z+7h9VTG3d0FGAuD2fW6Lk9dqsdSCwSTYGSHaLtOabbxag=
X-Received by 2002:a02:7f12:: with SMTP id r18mr6213312jac.75.1587419029241; Mon, 20 Apr 2020 14:43:49 -0700 (PDT)
In-Reply-To <CAHmME9p_n_W6721mY4=MWpKJvDTNsvEQbA9EB5chsrwyOzSgqw@mail.gmail.com>
X-Gmail-Original-Message-ID <CAHmME9o+guCLQsOUxfhrwY83jRT04TqrNU-dVYPi0f=PdEv=kg@mail.gmail.com>
Received-SPF pass client-ip=192.95.5.64; envelope-from=Jason@zx2c4.com; helo=mail.zx2c4.com
X-detected-operating-system by eggs.gnu.org: First seen = 2020/04/20 17:01:28
X-ACL-Warn Detected OS = Linux 3.11 and newer
X-Received-From 192.95.5.64
X-BeenThere bug-bash@gnu.org
X-Mailman-Version 2.1.23
Precedence list
List-Id Bug reports for the GNU Bourne Again SHell <bug-bash.gnu.org>
List-Unsubscribe <https://lists.gnu.org/mailman/options/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=unsubscribe>
List-Archive <https://lists.gnu.org/archive/html/bug-bash>
List-Post <mailto:bug-bash@gnu.org>
List-Help <mailto:bug-bash-request@gnu.org?subject=help>
List-Subscribe <https://lists.gnu.org/mailman/listinfo/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=subscribe>
X-Mailman-Original-Message-ID <CAHmME9o+guCLQsOUxfhrwY83jRT04TqrNU-dVYPi0f=PdEv=kg@mail.gmail.com>
X-Mailman-Original-References <20200420051508.GA2359844@zx2c4.com> <7496b183-2db3-6c03-6074-928adcd08f45@case.edu> <CAHmME9p_n_W6721mY4=MWpKJvDTNsvEQbA9EB5chsrwyOzSgqw@mail.gmail.com>
Xref csiph.com gnu.bash.bug:16203

Show key headers only | View raw


Here's a simpler reproducer:

set -e
a="my name is a"
b="my name is b"
pretty() { echo -e "\x1b[0m"; }
doit() { pretty; "$@"; }
while true; do
   doit cat <(echo "$a") <(echo "$b")
done

Back to gnu.bash.bug | Previous | Next | Find similar


Thread

Re: process substitution fd lifetime race condition "Jason A. Donenfeld" <Jason@zx2c4.com> - 2020-04-20 15:43 -0600

csiph-web