From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8AD21C282C7 for ; Tue, 29 Jan 2019 16:33:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4DA7F2087F for ; Tue, 29 Jan 2019 16:33:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548779607; bh=8rrzZc+VihJ+kJEZrjzc1YtOnMGGHD7tM1PXcY3iIxw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=L5MtMkK+3kE+LfEcWJtFc3VviDNydhyYDkdsDf7Imqv+rnEYnJN6ludO15YomnhzT rdxPcykq7f4oIcHcSfgJccGGklXluQ+MkgE1jKMmSv51UFe2Fr45Qdy8spPNMs5ByT QKi8hh7nh1E/DmUkT+zNR0jYBwBmZtAhQZ1YjKjY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728387AbfA2QdZ (ORCPT ); Tue, 29 Jan 2019 11:33:25 -0500 Received: from mail.kernel.org ([198.145.29.99]:48570 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726374AbfA2QdZ (ORCPT ); Tue, 29 Jan 2019 11:33:25 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9232420869; Tue, 29 Jan 2019 16:33:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548779604; bh=8rrzZc+VihJ+kJEZrjzc1YtOnMGGHD7tM1PXcY3iIxw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pVzBf6WV9maIvX9/oEJKU24f44qG5+fZWO4oUb4RT7Fl9awoPUyrGhKPOtf9LpEx9 nk21PH+voL34lAx2K7hUyD3WIibnpdQILvhFMD1En9nGJYLN5LeZy1O2rOgNSG07NB 6WnHMoRm1tFZkFZdQH5t9BuhLyAUWlsKqog8jXrg= Date: Tue, 29 Jan 2019 17:33:21 +0100 From: Greg Kroah-Hartman To: Camelia Alexandra Groza Cc: Holger =?iso-8859-1?Q?Hoffst=E4tte?= , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" , Scott Wood , "David S. Miller" , Heiner Kallweit , Andrew Lunn Subject: Re: [PATCH 4.19 006/103] net: phy: phy driver features are mandatory Message-ID: <20190129163321.GA21868@kroah.com> References: <20190129113159.567154026@linuxfoundation.org> <20190129113159.909710200@linuxfoundation.org> <2f2aa129-e9fb-c75a-1b60-1821863986bf@applied-asynchrony.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.11.2 (2019-01-07) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 29, 2019 at 04:05:16PM +0000, Camelia Alexandra Groza wrote: > > -----Original Message----- > > From: Holger Hoffstätte > > Sent: Tuesday, January 29, 2019 17:50 > > To: Greg Kroah-Hartman ; linux- > > kernel@vger.kernel.org > > Cc: stable@vger.kernel.org; Scott Wood ; Camelia > > Alexandra Groza ; David S. Miller > > ; Heiner Kallweit > > Subject: Re: [PATCH 4.19 006/103] net: phy: phy driver features are > > mandatory > > > > On 1/29/19 12:34 PM, Greg Kroah-Hartman wrote: > > > 4.19-stable review patch. If anyone has any objections, please let me > > know. > > > > > > ------------------ > > > > > > From: Camelia Groza > > > > > > [ Upstream commit 3e64cf7a435ed0500e3adaa8aada2272d3ae8abc ] > > > > > > Since phy driver features became a link_mode bitmap, phy drivers that > > > don't have a list of features configured will cause the kernel to crash > > > when probed. > > > > > > Prevent the phy driver from registering if the features field is missing. > > > > > > Fixes: 719655a14971 ("net: phy: Replace phy driver features u32 with > > link_mode bitmap") > > > Reported-by: Scott Wood > > > Signed-off-by: Camelia Groza > > > Signed-off-by: David S. Miller > > > Signed-off-by: Greg Kroah-Hartman > > > --- > > > drivers/net/phy/phy_device.c | 5 +++++ > > > include/linux/phy.h | 4 ++-- > > > 2 files changed, 7 insertions(+), 2 deletions(-) > > > > > > --- a/drivers/net/phy/phy_device.c > > > +++ b/drivers/net/phy/phy_device.c > > > @@ -1917,6 +1917,11 @@ int phy_driver_register(struct phy_drive > > > { > > > int retval; > > > > > > + if (WARN_ON(!new_driver->features)) { > > > + pr_err("%s: Driver features are missing\n", new_driver- > > >name); > > > + return -EINVAL; > > > + } > > > + > > > new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; > > > new_driver->mdiodrv.driver.name = new_driver->name; > > > new_driver->mdiodrv.driver.bus = &mdio_bus_type; > > > --- a/include/linux/phy.h > > > +++ b/include/linux/phy.h > > > @@ -491,8 +491,8 @@ struct phy_device { > > > * only works for PHYs with IDs which match this field > > > * name: The friendly name of this PHY type > > > * phy_id_mask: Defines the important bits of the phy_id > > > - * features: A list of features (speed, duplex, etc) supported > > > - * by this PHY > > > + * features: A mandatory list of features (speed, duplex, etc) > > > + * supported by this PHY > > > * flags: A bitfield defining certain other features this PHY > > > * supports (like interrupts) > > > * > > > > > > > This patch leads to the following dump during boot and no working > > network: > > > > Jan 29 13:11:50 ragnarok kernel: RIP: 0010:phy_driver_register+0x5f/0x80 > > [libphy] > > Jan 29 13:11:50 ragnarok kernel: Code: dd 06 a0 48 c7 47 40 30 e4 06 a0 48 89 > > 77 10 c7 47 24 02 00 00 00 e8 10 5c 44 e1 89 c5 85 c0 0f 85 aa 1d 00 00 89 e8 5b > > 5d c3 <0f> 0b 48 c7 c7 f0 20 07 a0 48 89 c6 bd ea ff ff ff e8 c9 4c 02 e1 > > Jan 29 13:11:50 ragnarok kernel: RSP: 0018:ffffc90000df3c78 EFLAGS: > > 00010246 > > Jan 29 13:11:50 ragnarok kernel: RAX: ffffffffa0071c8d RBX: 0000000000000000 > > RCX: 0000000000000000 > > Jan 29 13:11:50 ragnarok kernel: RDX: 0000000000000000 RSI: ffffffffa0076900 > > RDI: ffffffffa0076040 > > Jan 29 13:11:50 ragnarok kernel: RBP: ffffffffa007a000 R08: 0000000000000044 > > R09: 0000000000000228 > > Jan 29 13:11:50 ragnarok kernel: R10: ffff888603a0d6f8 R11: > > 000000000000003c R12: ffff888601252d00 > > Jan 29 13:11:50 ragnarok kernel: R13: 0000000000000002 R14: > > ffffc90000df3e98 R15: ffffffffa0076900 > > Jan 29 13:11:50 ragnarok kernel: FS: 00007feea9ced800(0000) > > GS:ffff888607240000(0000) knlGS:0000000000000000 > > Jan 29 13:11:50 ragnarok kernel: CS: 0010 DS: 0000 ES: 0000 CR0: > > 0000000080050033 > > Jan 29 13:11:50 ragnarok kernel: CR2: 00007feea9cdfc42 CR3: > > 00000005fec64001 CR4: 00000000000606e0 > > Jan 29 13:11:50 ragnarok kernel: Call Trace: > > Jan 29 13:11:50 ragnarok kernel: ? 0xffffffffa007a000 > > Jan 29 13:11:50 ragnarok kernel: phy_init+0x24/0x58 [libphy] > > Jan 29 13:11:50 ragnarok kernel: do_one_initcall+0x43/0x1af > > Jan 29 13:11:50 ragnarok kernel: ? _cond_resched+0x15/0x30 > > Jan 29 13:11:50 ragnarok kernel: ? kmem_cache_alloc_trace+0x154/0x1b0 > > Jan 29 13:11:50 ragnarok kernel: do_init_module+0x5a/0x210 > > Jan 29 13:11:50 ragnarok kernel: load_module+0x203a/0x2500 > > Jan 29 13:11:50 ragnarok kernel: ? vfs_read+0x10d/0x130 > > Jan 29 13:11:50 ragnarok kernel: ? __se_sys_finit_module+0xb1/0xd0 > > Jan 29 13:11:50 ragnarok kernel: __se_sys_finit_module+0xb1/0xd0 > > Jan 29 13:11:50 ragnarok kernel: do_syscall_64+0x3e/0xe0 > > Jan 29 13:11:50 ragnarok kernel: > > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > Jan 29 13:11:50 ragnarok kernel: RIP: 0033:0x7feeaa2417c9 > > Jan 29 13:11:50 ragnarok kernel: Code: 00 00 00 75 05 48 83 c4 18 c3 e8 82 9c 01 > > 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 > > <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 87 c6 0c 00 f7 d8 64 89 01 48 > > Jan 29 13:11:50 ragnarok kernel: RSP: 002b:00007fff6fa6ea08 EFLAGS: > > 00000246 ORIG_RAX: 0000000000000139 > > Jan 29 13:11:50 ragnarok kernel: RAX: ffffffffffffffda RBX: 000055c6eac06db0 > > RCX: 00007feeaa2417c9 > > Jan 29 13:11:50 ragnarok kernel: RDX: 0000000000000000 RSI: > > 00007feeaa4198fd RDI: 0000000000000006 > > Jan 29 13:11:50 ragnarok kernel: RBP: 00007feeaa4198fd R08: > > 0000000000000000 R09: 000055c6eac03000 > > Jan 29 13:11:50 ragnarok kernel: R10: 0000000000000006 R11: > > 0000000000000246 R12: 0000000000000000 > > Jan 29 13:11:50 ragnarok kernel: R13: 000055c6eabfc1d0 R14: > > 0000000000020000 R15: 000055c6eac06db0 > > Jan 29 13:11:50 ragnarok kernel: ---[ end trace 18e05a0afeb140b2 ]--- > > Jan 29 13:11:50 ragnarok kernel: libphy: Generic 10G PHY: Driver features are > > missing > > > > Apparently the r8169 driver for my NIC does something wrong wrt. this > > fix and the original commit (719655a14971), but regardless - reverting this > > patch leads to a booting & working 4.19.19: > > > > Jan 29 13:29:16 ragnarok kernel: libphy: r8169: probed > > Jan 29 13:29:19 ragnarok kernel: RTL8211E Gigabit Ethernet r8169-400:00: > > attached PHY driver [RTL8211E Gigabit Ethernet] (mii_bus:phy_addr=r8169- > > 400:00, irq=IGNORE) > > > > I've cc'ed Heiner Kallweit who might know why phylib with this fix and r8169 > > don't like each other. > > > > cheers, > > Holger > > Hi > > This points to an issue with the Generic 10G PHY driver. The following patch seems to be missing from the 4.19 stable tree and should be merged: > f802912 net: phy: genphy_10g_driver: Avoid NULL pointer dereference But that patch says it: Fixes: 719655a14971 ("net: phy: Replace phy driver features u32 with link_mode bitmap") Which is not in 4.19.y, it showed up in 4.20. Ah, wait, I think that there was a patch backported to the 4.19.y queue that should not have, specifically: 3e64cf7a435e ("net: phy: phy driver features are mandatory") which said it too fixes: 719655a14971 ("net: phy: Replace phy driver features u32 with link_mode bitmap") Holger, if you revert 3e64cf7a435e, does that solve the problem for you here? thanks, greg k-h