From nobody Mon Sep 30 11:49:56 2024 X-Original-To: jail@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4XHKBF14TRz5YBJ4 for ; Mon, 30 Sep 2024 11:49:57 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4XHKBD42k0z47xx for ; Mon, 30 Sep 2024 11:49:56 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1727696996; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; 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Mon, 30 Sep 2024 11:49:56 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 48UBnume004723 for ; Mon, 30 Sep 2024 11:49:56 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 48UBnurl004722 for jail@FreeBSD.org; Mon, 30 Sep 2024 11:49:56 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: jail@FreeBSD.org Subject: [Bug 281751] Unable to start jail from vty1... virtual terminal Date: Mon, 30 Sep 2024 11:49:56 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: 14.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: lexa@libraw.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: jail@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Discussion about FreeBSD jail(8) List-Archive: https://lists.freebsd.org/archives/freebsd-jail List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-jail@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D281751 --- Comment #36 from Alex Tutubalin --- (In reply to Olivier Certner from comment #35) 1) fstat -p on ttyv0 (/usr/sbin/jail -c succeeds): USER CMD PID FD MOUNT INUM MODE SZ|DV R/W root sh 6384 text / 2188 -r-xr-xr-x 168344 r root sh 6384 ctty /dev 74 crw------- ttyv0 rw root sh 6384 wd / 5 drwxr-xr-x 23 r root sh 6384 root / 34 drwxr-xr-x 27 r root sh 6384 0 /dev 74 crw------- ttyv0 rw root sh 6384 1 /dev 74 crw------- ttyv0 rw root sh 6384 2 /dev 74 crw------- ttyv0 rw root sh 6384 10 /dev 74 crw------- ttyv0 rw 2) fstat -p on ttyv1 (jail -c fails): USER CMD PID FD MOUNT INUM MODE SZ|DV R/W root sh 6812 text / 2188 -r-xr-xr-x 168344 r root sh 6812 ctty /dev 75 crw------- ttyv1 rw root sh 6812 wd / 5 drwxr-xr-x 24 r root sh 6812 root / 34 drwxr-xr-x 27 r root sh 6812 0 /dev 75 crw------- ttyv1 rw root sh 6812 1 /dev 75 crw------- ttyv1 rw root sh 6812 2 /dev 75 crw------- ttyv1 rw root sh 6812 5 / 69283 drwx------ 4 r root sh 6812 10 /dev 75 crw------- ttyv1 rw It differs only by inode 69283 so find / -inum 69283 results in /var/run/xdg/root (this is folder with xdg_session.* file) 3) dtrace script you propose: - shows nothing if jail -c on ttyv0 - outputs this if jail -c is started on ttyv1: CPU ID FUNCTION:NAME 7 51518 pwd_chroot_chdir:return=20 kernel`do_jail_attach+0x20b kernel`amd64_syscall+0x158 kernel`0xffffffff8104e7bb Things are more clear now: /var/run/xdg/username is created by pam_xdg, on 1st user login on ttyvN but= not on pts/N So, ttyv0 is not magical: - logged out from all virtual consoles (ttyvN) - /var/run/xdg/root disappears=20 - logged in on ttyv1 - folder re-created. - Now I can start jail from ttyv1 but not from ttyv0 or ttyv2 Still do not know what pam_xdg is :) --=20 You are receiving this mail because: You are the assignee for the bug.=