From nobody Tue Aug 15 21:33:51 2023 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 4RQPf82T0jz4qSFN for ; Tue, 15 Aug 2023 21:33:52 +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 "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4RQPf773Ypz4Fj0 for ; Tue, 15 Aug 2023 21:33:51 +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=1692135232; 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; bh=r+zzqX+DkQRwzbukUJrFFfba5h0RvIjRvvfsUytHG6o=; b=tfUxde27Z3UrJwyk85He5cBTwBhBybEyhvheSyj05M4aaOh4LZkME/b9VYBxRZDnjZjYrV xki/tBF64D88ox72kIRtlQZDh3HjCz31rCX8nYEMEgDmY/q+JxWaOXIM6JY9kAahJHkEGN T/e9VFmdyzhrOvJTebatIHdsLtDE36CXqj9COP/rzS509U/30dHqbXUueXGicOLhB/S6Vl U2lw0kQifix1rXwnM5t4byEmTjoj1qRIBLAVvgBXZkNePn6ZXsbwRXraiCkPaAb9pZgbgn gQ3dZQsMDQ/KzDMANiZ6n3jANduD62u9Sp3hhIskMAFc9iTa5yNh0xtRqbnz+g== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1692135232; a=rsa-sha256; cv=none; b=xP5c1cdwtuNHFPNj4+A2v8DB7bFPC4TFwrvfkZu3vYhQQ8gPl7d6luy8qnxfmQy5p+dh5A LiDxqGCZ/2St/BkcLAJJJSQJ2lT3JPCV23QOchF5akd6Ddk5Dc2NcdIk5z+qju1hW6Gt/y f9LxfBXlUdXRD1s5ntORv8/N/n6Tw3F2t9frhPEyHV04aMV5UPZt6M9IwYuKRivjtH8mbN yjgV9dUxYIDO7jaJ44ycos9n1WRYSRqF86Ur6zFUoU5YBxOe8T0I05DBT2DF3vdaXsbgGI FN5bjZqYtUn/EuzP0xe43G4naJJAtjYmeFI1fvM+kpIUxpsiFlNPhCxFHHjEpA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4RQPf7678wzB8K for ; Tue, 15 Aug 2023 21:33:51 +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 37FLXp9p044162 for ; Tue, 15 Aug 2023 21:33:51 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 37FLXpIM044160 for jail@FreeBSD.org; Tue, 15 Aug 2023 21:33:51 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 271069] syslogd service inside client jail requires restart before server jail receives logs Date: Tue, 15 Aug 2023 21:33:51 +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: 13.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: me@svmhdvn.name X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: jail@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.isobsolete attachments.created 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=3D271069 Siva Mahadevan changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #244032|0 |1 is obsolete| | Attachment #244033|0 |1 is obsolete| | --- Comment #7 from Siva Mahadevan --- Created attachment 244132 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D244132&action= =3Dedit minimal workaround Found the root issue (all based on comment #3 with code from releng/13.2 branch, but it's still applicable in the main branch): When the IPv6 jail is created, `/sbin/ifconfig inet6 alias` gets called to create the new IPv6 alias address. T= his calls the `SIOCAIFADDR` ioctl at sbin/ifconfig/ifconfig.c:1042, which eventually reaches sys/netinet6/in6.c:560 in the kernel. Once the new ipv6 address is created, it is marked IN6_IFF_TENTATIVE at sys/netinet6/in6.c:11= 77 and then later queued for Duplicate Address Detection at sys/netinet6/in6.c:1247. However, the call to `nd6_dad_start(...)` is asynchronous and returns immediately after starting the DAD timer at sys/netinet6/nd6_nbr.c:1341. This causes a race condition between: * completing the DAD process and clearing the IN6_IFF_TENTATIVE flag on the newly created IPv6 address * exiting the `/sbin/ifconfig` call successfully, finishing jail setup, and starting the jail while its IPv6 address is still marked as "tentative" By adding a sufficiently long pause at (b) in the newly attached patch, this gives enough time for the next `nd6_timer(...)` run to find this tentative address, complete DAD, and clear the IN6_IFF_TENTATIVE flag. This is confir= med by adding the exact same pause at (a) instead of (b), then noticing that the race condition still exists. I don't have much knowledge of the IPv6 networking stack, so I'm not sure a= bout the proper fix here. However, it seems like there could be two possible fix= es here: * `SIOCAIFADDR` ioctl call still returns a tentative IPv6 address pending f= ull DAD completion, but change the userspace `/sbin/ifconfig` tool to wait until the tentative flag is cleared before exiting successfully * change the `SIOCAIFADDR` ioctl handler to call the DAD routine synchronou= sly and return back a regular non-tentative address --=20 You are receiving this mail because: You are the assignee for the bug.= From nobody Tue Aug 15 21:56:29 2023 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 4RQQ8F5hr2z4qT70 for ; Tue, 15 Aug 2023 21:56:29 +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 "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4RQQ8F095bz4HJ3 for ; Tue, 15 Aug 2023 21:56:29 +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=1692136589; 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; bh=uvgmuj+zkCF1+qPzo4REIioIEB9ms3qasl7G5c/ca6s=; b=ijmXIv6FTqmzf+82Gwy+WdH1lagLufFVHJ7Au4hG/4Gu3byzmBWo+SssxYkrOpI8tEEbxy rCzPtSCCzXUHFinlcxPrb3LTvqzSJzKSOlZOZHtu1iRFO6uMZyrYTkdq2u93ZpvTk6984s Lzo5gd5CGPcX06Vwv9N9hqGiZE0RmgSdB8UrDotSAoy3fwZ1B3uYWeVE38jUOrOVBWz0Q+ rt9tWrLw00J/x7NwzjmNBdswg3iJNuip8jTJ7L3nh2HwlwwVt7gk7uFLI7FzAc9l1llQWk Ynz9LW/UAlLl+fQD8xAc951DDr6iph+7mxNEoMzoY5yS5kgCH5raL6z10xhQwg== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1692136589; a=rsa-sha256; cv=none; b=KyWHtGiut7GNMpGtZA/AhazfmN1mxC1yTZy9FX93ET7WLtE8760DsYjLMucZLa4zl4Erjp MEpxSvJPS/x103wuEk9IN79SSRdOoKo8cjE5XNEqqgADa7oamwMMpPv7A2Pr01SIwePJXd AAHBpFWPITTibbKrwLvB+/42Benfu12PpcQpqqAgdSljLH184FsICBjV2FPSPwfzLyV1B0 oiiyU7opyj+pgx2zhhFuEluJd5Mh4miWJ5tmbQlT32+8s5EA6YiLfUw+Uj4Z1sPAKaJtBh SusQwl/cISybU+kBW8qtJ3leP1gSTcR0tGbdQwTlb/bYQuBL3kA09AAmMGi0Pw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4RQQ8D6KpczBYS for ; Tue, 15 Aug 2023 21:56:28 +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 37FLuSoE077687 for ; Tue, 15 Aug 2023 21:56:28 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 37FLuSXR077686 for jail@FreeBSD.org; Tue, 15 Aug 2023 21:56:28 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 271069] syslogd service inside client jail requires restart before server jail receives logs Date: Tue, 15 Aug 2023 21:56:29 +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: 13.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: dvl@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: jail@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc 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=3D271069 Dan Langille changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dvl@FreeBSD.org --- Comment #8 from Dan Langille --- (In reply to Siva Mahadevan from comment #7) Congratulations. Well done. --=20 You are receiving this mail because: You are the assignee for the bug.=