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Message-ID: <20240409201553.GA4124869@dev-arch.thelio-3990X>
Date: Tue, 9 Apr 2024 13:15:53 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
Russell King <linux@...linux.org.uk>,
linux-arm-kernel@...ts.infradead.org,
Christophe Leroy <christophe.leroy@...roup.eu>,
Herve Codina <herve.codina@...tlin.com>,
Florian Fainelli <f.fainelli@...il.com>,
Heiner Kallweit <hkallweit1@...il.com>,
Vladimir Oltean <vladimir.oltean@....com>,
Köry Maincent <kory.maincent@...tlin.com>,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
Jonathan Corbet <corbet@....net>,
Marek Behún <kabel@...nel.org>,
Piergiorgio Beruto <piergiorgio.beruto@...il.com>,
Oleksij Rempel <o.rempel@...gutronix.de>,
Nicolò Veronese <nicveronese@...il.com>,
Simon Horman <horms@...nel.org>, mwojtas@...omium.org
Subject: Re: [PATCH net-next v11 01/13] net: phy: Introduce ethernet link
topology representation
Hi Maxime,
On Thu, Apr 04, 2024 at 11:29:51AM +0200, Maxime Chevallier wrote:
> Link topologies containing multiple network PHYs attached to the same
> net_device can be found when using a PHY as a media converter for use
> with an SFP connector, on which an SFP transceiver containing a PHY can
> be used.
>
> With the current model, the transceiver's PHY can't be used for
> operations such as cable testing, timestamping, macsec offload, etc.
>
> The reason being that most of the logic for these configuration, coming
> from either ethtool netlink or ioctls tend to use netdev->phydev, which
> in multi-phy systems will reference the PHY closest to the MAC.
>
> Introduce a numbering scheme allowing to enumerate PHY devices that
> belong to any netdev, which can in turn allow userspace to take more
> precise decisions with regard to each PHY's configuration.
>
> The numbering is maintained per-netdev, in a phy_device_list.
> The numbering works similarly to a netdevice's ifindex, with
> identifiers that are only recycled once INT_MAX has been reached.
>
> This prevents races that could occur between PHY listing and SFP
> transceiver removal/insertion.
>
> The identifiers are assigned at phy_attach time, as the numbering
> depends on the netdevice the phy is attached to. The PHY index can be
> re-used for PHYs that are persistent.
>
> Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
> ---
> V11: - No changes
> V10: - No changes
> V9: - No changes
> V8: - Rebase on net-next and fixed conflicts
> V7: - Protected the phy_link_topo helpers/stubs with IS_REACHABLE
> V6: - Made link_topo a pointer
> - Reworked the init/cleanup sequence
> - Added phy_index recycling if possible
> V5: - Dropped the ASSERT_RTNL()
> - Made the phy_link_topo_get_phy inline
> V4: - Moved the phy_link_topo_init() code to an inline header function
> - Made the code build without phylib
> V3: - Renamed to phy_link_topology
> - Added assertions for RTNL
> - Various cleanups of leftover, unused test code
> - Made the PHY index u32
>
> MAINTAINERS | 2 +
> drivers/net/phy/Makefile | 2 +-
> drivers/net/phy/phy_device.c | 7 ++
> drivers/net/phy/phy_link_topology.c | 105 +++++++++++++++++++++++++
> include/linux/netdevice.h | 4 +-
> include/linux/phy.h | 4 +
> include/linux/phy_link_topology.h | 72 +++++++++++++++++
> include/linux/phy_link_topology_core.h | 25 ++++++
> include/uapi/linux/ethtool.h | 16 ++++
> net/core/dev.c | 9 +++
> 10 files changed, 244 insertions(+), 2 deletions(-)
> create mode 100644 drivers/net/phy/phy_link_topology.c
> create mode 100644 include/linux/phy_link_topology.h
> create mode 100644 include/linux/phy_link_topology_core.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 909c2c531d8e..db0aa3a926ae 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -8016,6 +8016,8 @@ F: include/linux/mii.h
> F: include/linux/of_net.h
> F: include/linux/phy.h
> F: include/linux/phy_fixed.h
> +F: include/linux/phy_link_topology.h
> +F: include/linux/phy_link_topology_core.h
> F: include/linux/phylib_stubs.h
> F: include/linux/platform_data/mdio-bcm-unimac.h
> F: include/linux/platform_data/mdio-gpio.h
> diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
> index 202ed7f450da..1d8be374915f 100644
> --- a/drivers/net/phy/Makefile
> +++ b/drivers/net/phy/Makefile
> @@ -2,7 +2,7 @@
> # Makefile for Linux PHY drivers
>
> libphy-y := phy.o phy-c45.o phy-core.o phy_device.o \
> - linkmode.o
> + linkmode.o phy_link_topology.o
> mdio-bus-y += mdio_bus.o mdio_device.o
>
> ifdef CONFIG_MDIO_DEVICE
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index 6c6ec9475709..452fc8b3406d 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -29,6 +29,7 @@
> #include <linux/phy.h>
> #include <linux/phylib_stubs.h>
> #include <linux/phy_led_triggers.h>
> +#include <linux/phy_link_topology.h>
> #include <linux/pse-pd/pse.h>
> #include <linux/property.h>
> #include <linux/rtnetlink.h>
> @@ -1511,6 +1512,11 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
>
> if (phydev->sfp_bus_attached)
> dev->sfp_bus = phydev->sfp_bus;
> +
> + err = phy_link_topo_add_phy(dev->link_topo, phydev,
> + PHY_UPSTREAM_MAC, dev);
> + if (err)
> + goto error;
> }
>
> /* Some Ethernet drivers try to connect to a PHY device before
> @@ -1938,6 +1944,7 @@ void phy_detach(struct phy_device *phydev)
> if (dev) {
> phydev->attached_dev->phydev = NULL;
> phydev->attached_dev = NULL;
> + phy_link_topo_del_phy(dev->link_topo, phydev);
> }
> phydev->phylink = NULL;
>
> diff --git a/drivers/net/phy/phy_link_topology.c b/drivers/net/phy/phy_link_topology.c
> new file mode 100644
> index 000000000000..985941c5c558
> --- /dev/null
> +++ b/drivers/net/phy/phy_link_topology.c
> @@ -0,0 +1,105 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Infrastructure to handle all PHY devices connected to a given netdev,
> + * either directly or indirectly attached.
> + *
> + * Copyright (c) 2023 Maxime Chevallier<maxime.chevallier@...tlin.com>
> + */
> +
> +#include <linux/phy_link_topology.h>
> +#include <linux/netdevice.h>
> +#include <linux/phy.h>
> +#include <linux/rtnetlink.h>
> +#include <linux/xarray.h>
> +
> +struct phy_link_topology *phy_link_topo_create(struct net_device *dev)
> +{
> + struct phy_link_topology *topo;
> +
> + topo = kzalloc(sizeof(*topo), GFP_KERNEL);
> + if (!topo)
> + return ERR_PTR(-ENOMEM);
> +
> + xa_init_flags(&topo->phys, XA_FLAGS_ALLOC1);
> + topo->next_phy_index = 1;
> +
> + return topo;
> +}
> +
> +void phy_link_topo_destroy(struct phy_link_topology *topo)
> +{
> + if (!topo)
> + return;
> +
> + xa_destroy(&topo->phys);
> + kfree(topo);
> +}
> +
> +int phy_link_topo_add_phy(struct phy_link_topology *topo,
> + struct phy_device *phy,
> + enum phy_upstream upt, void *upstream)
> +{
> + struct phy_device_node *pdn;
> + int ret;
> +
> + pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
> + if (!pdn)
> + return -ENOMEM;
> +
> + pdn->phy = phy;
> + switch (upt) {
> + case PHY_UPSTREAM_MAC:
> + pdn->upstream.netdev = (struct net_device *)upstream;
> + if (phy_on_sfp(phy))
> + pdn->parent_sfp_bus = pdn->upstream.netdev->sfp_bus;
> + break;
> + case PHY_UPSTREAM_PHY:
> + pdn->upstream.phydev = (struct phy_device *)upstream;
> + if (phy_on_sfp(phy))
> + pdn->parent_sfp_bus = pdn->upstream.phydev->sfp_bus;
> + break;
> + default:
> + ret = -EINVAL;
> + goto err;
> + }
> + pdn->upstream_type = upt;
> +
> + /* Attempt to re-use a previously allocated phy_index */
> + if (phy->phyindex) {
> + ret = xa_insert(&topo->phys, phy->phyindex, pdn, GFP_KERNEL);
> +
> + /* Errors could be either -ENOMEM or -EBUSY. If the phy has an
> + * index, and there's another entry at the same index, this is
> + * unexpected and we still error-out
> + */
> + if (ret)
> + goto err;
> + return 0;
> + }
> +
> + ret = xa_alloc_cyclic(&topo->phys, &phy->phyindex, pdn, xa_limit_32b,
> + &topo->next_phy_index, GFP_KERNEL);
> + if (ret)
> + goto err;
> +
> + return 0;
> +
> +err:
> + kfree(pdn);
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(phy_link_topo_add_phy);
> +
> +void phy_link_topo_del_phy(struct phy_link_topology *topo,
> + struct phy_device *phy)
> +{
> + struct phy_device_node *pdn = xa_erase(&topo->phys, phy->phyindex);
> +
> + /* We delete the PHY from the topology, however we don't re-set the
> + * phy->phyindex field. If the PHY isn't gone, we can re-assign it the
> + * same index next time it's added back to the topology
> + */
> +
> + kfree(pdn);
> +}
> +EXPORT_SYMBOL_GPL(phy_link_topo_del_phy);
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 0c198620ac93..d45f330d083d 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -40,7 +40,6 @@
> #include <net/dcbnl.h>
> #endif
> #include <net/netprio_cgroup.h>
> -
> #include <linux/netdev_features.h>
> #include <linux/neighbour.h>
> #include <uapi/linux/netdevice.h>
> @@ -52,6 +51,7 @@
> #include <net/net_trackers.h>
> #include <net/net_debug.h>
> #include <net/dropreason-core.h>
> +#include <linux/phy_link_topology_core.h>
>
> struct netpoll_info;
> struct device;
> @@ -1974,6 +1974,7 @@ enum netdev_reg_state {
> * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
> *
> * @priomap: XXX: need comments on this one
> + * @link_topo: Physical link topology tracking attached PHYs
> * @phydev: Physical device may attach itself
> * for hardware timestamping
> * @sfp_bus: attached &struct sfp_bus structure.
> @@ -2364,6 +2365,7 @@ struct net_device {
> #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
> struct netprio_map __rcu *priomap;
> #endif
> + struct phy_link_topology *link_topo;
> struct phy_device *phydev;
> struct sfp_bus *sfp_bus;
> struct lock_class_key *qdisc_tx_busylock;
> diff --git a/include/linux/phy.h b/include/linux/phy.h
> index e6e83304558e..8c848c79b1fd 100644
> --- a/include/linux/phy.h
> +++ b/include/linux/phy.h
> @@ -550,6 +550,9 @@ struct macsec_ops;
> * @drv: Pointer to the driver for this PHY instance
> * @devlink: Create a link between phy dev and mac dev, if the external phy
> * used by current mac interface is managed by another mac interface.
> + * @phyindex: Unique id across the phy's parent tree of phys to address the PHY
> + * from userspace, similar to ifindex. A zero index means the PHY
> + * wasn't assigned an id yet.
> * @phy_id: UID for this device found during discovery
> * @c45_ids: 802.3-c45 Device Identifiers if is_c45.
> * @is_c45: Set to true if this PHY uses clause 45 addressing.
> @@ -650,6 +653,7 @@ struct phy_device {
>
> struct device_link *devlink;
>
> + u32 phyindex;
> u32 phy_id;
>
> struct phy_c45_device_ids c45_ids;
> diff --git a/include/linux/phy_link_topology.h b/include/linux/phy_link_topology.h
> new file mode 100644
> index 000000000000..6b79feb607e7
> --- /dev/null
> +++ b/include/linux/phy_link_topology.h
> @@ -0,0 +1,72 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * PHY device list allow maintaining a list of PHY devices that are
> + * part of a netdevice's link topology. PHYs can for example be chained,
> + * as is the case when using a PHY that exposes an SFP module, on which an
> + * SFP transceiver that embeds a PHY is connected.
> + *
> + * This list can then be used by userspace to leverage individual PHY
> + * capabilities.
> + */
> +#ifndef __PHY_LINK_TOPOLOGY_H
> +#define __PHY_LINK_TOPOLOGY_H
> +
> +#include <linux/ethtool.h>
> +#include <linux/phy_link_topology_core.h>
> +
> +struct xarray;
> +struct phy_device;
> +struct net_device;
> +struct sfp_bus;
> +
> +struct phy_device_node {
> + enum phy_upstream upstream_type;
> +
> + union {
> + struct net_device *netdev;
> + struct phy_device *phydev;
> + } upstream;
> +
> + struct sfp_bus *parent_sfp_bus;
> +
> + struct phy_device *phy;
> +};
> +
> +struct phy_link_topology {
> + struct xarray phys;
> + u32 next_phy_index;
> +};
> +
> +static inline struct phy_device *
> +phy_link_topo_get_phy(struct phy_link_topology *topo, u32 phyindex)
> +{
> + struct phy_device_node *pdn = xa_load(&topo->phys, phyindex);
> +
> + if (pdn)
> + return pdn->phy;
> +
> + return NULL;
> +}
> +
> +#if IS_REACHABLE(CONFIG_PHYLIB)
> +int phy_link_topo_add_phy(struct phy_link_topology *topo,
> + struct phy_device *phy,
> + enum phy_upstream upt, void *upstream);
> +
> +void phy_link_topo_del_phy(struct phy_link_topology *lt, struct phy_device *phy);
> +
> +#else
> +static inline int phy_link_topo_add_phy(struct phy_link_topology *topo,
> + struct phy_device *phy,
> + enum phy_upstream upt, void *upstream)
> +{
> + return 0;
> +}
> +
> +static inline void phy_link_topo_del_phy(struct phy_link_topology *topo,
> + struct phy_device *phy)
> +{
> +}
> +#endif
> +
> +#endif /* __PHY_LINK_TOPOLOGY_H */
> diff --git a/include/linux/phy_link_topology_core.h b/include/linux/phy_link_topology_core.h
> new file mode 100644
> index 000000000000..0a6479055745
> --- /dev/null
> +++ b/include/linux/phy_link_topology_core.h
> @@ -0,0 +1,25 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef __PHY_LINK_TOPOLOGY_CORE_H
> +#define __PHY_LINK_TOPOLOGY_CORE_H
> +
> +struct phy_link_topology;
> +
> +#if IS_REACHABLE(CONFIG_PHYLIB)
> +
> +struct phy_link_topology *phy_link_topo_create(struct net_device *dev);
> +void phy_link_topo_destroy(struct phy_link_topology *topo);
> +
> +#else
> +
> +static inline struct phy_link_topology *phy_link_topo_create(struct net_device *dev)
> +{
> + return NULL;
> +}
> +
> +static inline void phy_link_topo_destroy(struct phy_link_topology *topo)
> +{
> +}
> +
> +#endif
> +
> +#endif /* __PHY_LINK_TOPOLOGY_CORE_H */
> diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
> index 11fc18988bc2..95c2f09f0d0a 100644
> --- a/include/uapi/linux/ethtool.h
> +++ b/include/uapi/linux/ethtool.h
> @@ -2268,4 +2268,20 @@ struct ethtool_link_settings {
> * __u32 map_lp_advertising[link_mode_masks_nwords];
> */
> };
> +
> +/**
> + * enum phy_upstream - Represents the upstream component a given PHY device
> + * is connected to, as in what is on the other end of the MII bus. Most PHYs
> + * will be attached to an Ethernet MAC controller, but in some cases, there's
> + * an intermediate PHY used as a media-converter, which will driver another
> + * MII interface as its output.
> + * @PHY_UPSTREAM_MAC: Upstream component is a MAC (a switch port,
> + * or ethernet controller)
> + * @PHY_UPSTREAM_PHY: Upstream component is a PHY (likely a media converter)
> + */
> +enum phy_upstream {
> + PHY_UPSTREAM_MAC,
> + PHY_UPSTREAM_PHY,
> +};
> +
> #endif /* _UAPI_LINUX_ETHTOOL_H */
> diff --git a/net/core/dev.c b/net/core/dev.c
> index 9b821d96eff3..928cf377e843 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -158,6 +158,7 @@
> #include <net/page_pool/types.h>
> #include <net/page_pool/helpers.h>
> #include <net/rps.h>
> +#include <linux/phy_link_topology_core.h>
>
> #include "dev.h"
> #include "net-sysfs.h"
> @@ -10962,6 +10963,12 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
> #ifdef CONFIG_NET_SCHED
> hash_init(dev->qdisc_hash);
> #endif
> + dev->link_topo = phy_link_topo_create(dev);
> + if (IS_ERR(dev->link_topo)) {
> + dev->link_topo = NULL;
> + goto free_all;
> + }
> +
> dev->priv_flags = IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM;
> setup(dev);
>
> @@ -11050,6 +11057,8 @@ void free_netdev(struct net_device *dev)
> free_percpu(dev->xdp_bulkq);
> dev->xdp_bulkq = NULL;
>
> + phy_link_topo_destroy(dev->link_topo);
> +
> /* Compatibility with error handling in drivers */
> if (dev->reg_state == NETREG_UNINITIALIZED) {
> netdev_freemem(dev);
> --
> 2.44.0
>
I bisected a crash that I see on one of my test devices to this change
in -next as commit 6916e461e793 ("net: phy: Introduce ethernet link
topology representation"). Here is the stack trace passed through
scripts/decode_stacktrace.sh:
[ 0.000000] Linux version 6.9.0-rc2-debug-00664-g6916e461e793 (nathan@...-arch.thelio-3990X) (x86_64-linux-gcc (GCC) 13.2.0, GNU ld (GNU Binutils) 2.41) #1 SMP PREEMPT_DYNAMIC Tue Apr 9 12:13:50 MST 2024
...
[ 5.616112] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 5.616148] #PF: supervisor write access in kernel mode
[ 5.616168] #PF: error_code(0x0002) - not-present page
[ 5.616185] PGD 0 P4D 0
[ 5.616199] Oops: 0002 [#1] PREEMPT SMP PTI
[ 5.616216] CPU: 1 PID: 263 Comm: (udev-worker) Not tainted 6.9.0-rc2-debug-00664-g6916e461e793 #1 70fb9ac6019045b1a6f31076c518c9320a4bc47a
[ 5.616255] Hardware name: ASUSTeK COMPUTER INC. Q302LA/Q302LA, BIOS Q302LA.203 05/15/2014
[ 5.616279] RIP: 0010:_raw_spin_lock (arch/x86/include/asm/atomic.h:115 (discriminator 4) include/linux/atomic/atomic-arch-fallback.h:2170 (discriminator 4) include/linux/atomic/atomic-instrumented.h:1302 (discriminator 4) include/asm-generic/qspinlock.h:111 (discriminator 4) include/linux/spinlock.h:187 (discriminator 4) include/linux/spinlock_api_smp.h:134 (discriminator 4) kernel/locking/spinlock.c:154 (discriminator 4))
[ 5.616301] Code: 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 65 ff 05 e8 51 30 4c 31 c0 ba 01 00 00 00 <f0> 0f b1 17 75 05 c3 cc cc cc cc 89 c6 e8 97 01 00 00 90 c3 cc cc
All code
========
0: 00 66 90 add %ah,-0x70(%rsi)
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: f3 0f 1e fa endbr64
17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1c: 65 ff 05 e8 51 30 4c incl %gs:0x4c3051e8(%rip) # 0x4c30520b
23: 31 c0 xor %eax,%eax
25: ba 01 00 00 00 mov $0x1,%edx
2a:* f0 0f b1 17 lock cmpxchg %edx,(%rdi) <-- trapping instruction
2e: 75 05 jne 0x35
30: c3 ret
31: cc int3
32: cc int3
33: cc int3
34: cc int3
35: 89 c6 mov %eax,%esi
37: e8 97 01 00 00 call 0x1d3
3c: 90 nop
3d: c3 ret
3e: cc int3
3f: cc int3
Code starting with the faulting instruction
===========================================
0: f0 0f b1 17 lock cmpxchg %edx,(%rdi)
4: 75 05 jne 0xb
6: c3 ret
7: cc int3
8: cc int3
9: cc int3
a: cc int3
b: 89 c6 mov %eax,%esi
d: e8 97 01 00 00 call 0x1a9
12: 90 nop
13: c3 ret
14: cc int3
15: cc int3
[ 5.616355] RSP: 0000:ffffc3aec04bba38 EFLAGS: 00010246
[ 5.617083] RAX: 0000000000000000 RBX: ffffa032d3db1c40 RCX: 0000000000000000
[ 5.617785] RDX: 0000000000000001 RSI: ffffffffc10385e3 RDI: 0000000000000000
[ 5.618502] RBP: ffffa032cdb2f800 R08: 0000000000000020 R09: 0000000000000000
[ 5.619224] R10: ffffc3aec04bba40 R11: 0000000000000001 R12: 0000000000000000
[ 5.619970] R13: 0000000000000000 R14: ffffa032c5ea3000 R15: ffffa032c11f80a8
[ 5.620722] FS: 00007f67d520b540(0000) GS:ffffa033d6e80000(0000) knlGS:0000000000000000
[ 5.621393] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5.622152] CR2: 0000000000000000 CR3: 0000000103eaa004 CR4: 00000000001706f0
[ 5.622942] Call Trace:
[ 5.623653] <TASK>
[ 5.624329] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434)
[ 5.625025] ? page_fault_oops (arch/x86/mm/fault.c:713 (discriminator 1))
[ 5.625791] ? exc_page_fault (arch/x86/include/asm/paravirt.h:693 arch/x86/mm/fault.c:1513 arch/x86/mm/fault.c:1563)
[ 5.626525] ? asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623)
[ 5.626535] ? phy_link_topo_add_phy (drivers/net/phy/phy_link_topology.c:46) libphy
[ 5.627954] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:115 (discriminator 4) include/linux/atomic/atomic-arch-fallback.h:2170 (discriminator 4) include/linux/atomic/atomic-instrumented.h:1302 (discriminator 4) include/asm-generic/qspinlock.h:111 (discriminator 4) include/linux/spinlock.h:187 (discriminator 4) include/linux/spinlock_api_smp.h:134 (discriminator 4) kernel/locking/spinlock.c:154 (discriminator 4))
[ 5.627963] phy_link_topo_add_phy (include/linux/xarray.h:977 drivers/net/phy/phy_link_topology.c:80) libphy
[ 5.629462] phy_attach_direct (drivers/net/phy/phy_device.c:1516) libphy
[ 5.629504] phylink_connect_phy (drivers/net/phy/phylink.c:1983) phylink
[ 5.631030] ax88772_bind (drivers/net/usb/asix_devices.c:710 drivers/net/usb/asix_devices.c:919) asix
[ 5.631049] usbnet_probe (drivers/net/usb/usbnet.c:1745) usbnet
[ 5.631062] ? __pfx_read_tsc (arch/x86/kernel/tsc.c:1129)
[ 5.631068] ? ktime_get_mono_fast_ns (kernel/time/timekeeping.c:438 kernel/time/timekeeping.c:452 kernel/time/timekeeping.c:492)
[ 5.631075] usb_probe_interface (drivers/usb/core/driver.c:400)
[ 5.631082] really_probe (drivers/base/dd.c:578 drivers/base/dd.c:656)
[ 5.631087] ? __pfx___driver_attach (drivers/base/dd.c:1155)
[ 5.631091] __driver_probe_device (drivers/base/dd.c:798)
[ 5.631094] driver_probe_device (drivers/base/dd.c:828)
[ 5.631098] __driver_attach (drivers/base/dd.c:1215)
[ 5.631102] bus_for_each_dev (drivers/base/bus.c:368)
[ 5.631108] bus_add_driver (drivers/base/bus.c:673)
[ 5.631112] driver_register (drivers/base/driver.c:246)
[ 5.631117] usb_register_driver (drivers/usb/core/driver.c:1068)
[ 5.631120] ? __pfx_asix_driver_init (drivers/net/usb/asix_devices.c:745) asix
[ 5.631134] do_one_initcall (init/main.c:1238)
[ 5.631141] do_init_module (kernel/module/main.c:2538)
[ 5.631147] init_module_from_file (kernel/module/main.c:3169)
[ 5.631153] idempotent_init_module (include/linux/spinlock.h:351 kernel/module/main.c:3131 kernel/module/main.c:3185)
[ 5.631158] __x64_sys_finit_module (include/linux/file.h:47 kernel/module/main.c:3207 kernel/module/main.c:3189 kernel/module/main.c:3189)
[ 5.631163] do_syscall_64 (arch/x86/entry/common.c:52 (discriminator 1) arch/x86/entry/common.c:83 (discriminator 1))
[ 5.631168] ? do_syscall_64 (arch/x86/include/asm/cpufeature.h:173 arch/x86/entry/common.c:98)
[ 5.631171] ? do_syscall_64 (arch/x86/include/asm/cpufeature.h:173 arch/x86/entry/common.c:98)
[ 5.631174] ? exc_page_fault (arch/x86/include/asm/paravirt.h:693 arch/x86/mm/fault.c:1513 arch/x86/mm/fault.c:1563)
[ 5.631179] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 5.631187] RIP: 0033:0x7f67d4d2488d
[ 5.631217] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 73 14 0d 00 f7 d8 64 89 01 48
All code
========
0: ff c3 inc %ebx
2: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
9: 00 00 00
c: 90 nop
d: f3 0f 1e fa endbr64
11: 48 89 f8 mov %rdi,%rax
14: 48 89 f7 mov %rsi,%rdi
17: 48 89 d6 mov %rdx,%rsi
1a: 48 89 ca mov %rcx,%rdx
1d: 4d 89 c2 mov %r8,%r10
20: 4d 89 c8 mov %r9,%r8
23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9
28: 0f 05 syscall
2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction
30: 73 01 jae 0x33
32: c3 ret
33: 48 8b 0d 73 14 0d 00 mov 0xd1473(%rip),%rcx # 0xd14ad
3a: f7 d8 neg %eax
3c: 64 89 01 mov %eax,%fs:(%rcx)
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 73 01 jae 0x9
8: c3 ret
9: 48 8b 0d 73 14 0d 00 mov 0xd1473(%rip),%rcx # 0xd1483
10: f7 d8 neg %eax
12: 64 89 01 mov %eax,%fs:(%rcx)
15: 48 rex.W
[ 5.631219] RSP: 002b:00007fff5a3fea18 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 5.631223] RAX: ffffffffffffffda RBX: 000055883cfb16b0 RCX: 00007f67d4d2488d
[ 5.631226] RDX: 0000000000000004 RSI: 00007f67d52ea376 RDI: 0000000000000019
[ 5.631229] RBP: 00007f67d52ea376 R08: 0000000000000001 R09: fffffffffffffe88
[ 5.631231] R10: 0000000000000050 R11: 0000000000000246 R12: 0000000000020000
[ 5.631233] R13: 000055883cfaf050 R14: 0000000000000000 R15: 000055883cfb6ea0
[ 5.631238] </TASK>
[ 5.631239] Modules linked in: sha512_ssse3 uvcvideo btusb(+) sha1_ssse3 ptp aesni_intel btrtl pps_core videobuf2_vmalloc ax88796b snd_hda_codec_hdmi asix(+) videobuf2_memops btintel mac80211 crypto_simd phylink cryptd uvc btbcm videobuf2_v4l2 selftests spi_nor mtd btmtk rapl videodev asus_nb_wmi libarc4 usbnet joydev vfat ak8975 iTCO_wdt asus_wmi mii iwlwifi videobuf2_common hid_multitouch intel_cstate at24 intel_pmc_bxt spi_intel_platform snd_hda_codec_realtek sparse_keymap fat mousedev hid_generic mei_pxp iTCO_vendor_support intel_rapl_msr spi_intel i915 mei_hdcp platform_profile libphy mc bluetooth intel_uncore snd_hda_codec_generic i2c_i801 snd_hda_scodec_component psmouse crc16 cfg80211 pcspkr processor_thermal_device_pci_legacy snd_hda_intel usbhid ecdh_generic i2c_smbus snd_intel_dspcfg intel_soc_dts_iosf processor_thermal_device lpc_ich rfkill i2c_algo_bit drm_buddy inv_mpu6050_i2c snd_hda_codec mei_me i2c_mux processor_thermal_wt_hint ttm snd_hwdep processor_thermal_rfim mei processor_thermal_rapl intel_gtt
[ 5.631322] inv_mpu6050 video snd_hda_core drm_display_helper intel_rapl_common snd_pcm inv_sensors_timestamp snd_timer processor_thermal_wt_req drm_kms_helper dell_smo8800 acpi_als int3400_thermal pinctrl_lynxpoint industrialio_triggered_buffer processor_thermal_power_floor snd processor_thermal_mbox cec wmi kfifo_buf int340x_thermal_zone acpi_thermal_rel industrialio soundcore soc_button_array asus_wireless mac_hid pkcs8_key_parser crypto_user drm fuse dm_mod loop nfnetlink zram ip_tables x_tables serio_raw atkbd libps2 vivaldi_fmap sha256_ssse3 xhci_pci xhci_pci_renesas i8042 serio btrfs blake2b_generic libcrc32c crc32c_generic crc32c_intel xor raid6_pq
[ 5.631374] CR2: 0000000000000000
[ 5.631377] ---[ end trace 0000000000000000 ]---
If there is any additional information I can provide or patches I can
test, I am more than happy to do so.
Cheers,
Nathan
# bad: [11cb68ad52ac78c81e33b806b531f097e68edfa2] Add linux-next specific files for 20240408
# good: [fec50db7033ea478773b159e0e2efb135270e3b7] Linux 6.9-rc3
git bisect start '11cb68ad52ac78c81e33b806b531f097e68edfa2' 'fec50db7033ea478773b159e0e2efb135270e3b7'
# bad: [b5ae7d7ff5458d024c8d8be346e405dd53bfe573] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git
git bisect bad b5ae7d7ff5458d024c8d8be346e405dd53bfe573
# good: [54f6c30962ec3738fa235457efe3a304f180e335] Merge branch 'renesas-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git
git bisect good 54f6c30962ec3738fa235457efe3a304f180e335
# bad: [267e31750ae89f845cfe7df8f577b19482d9ef9b] Merge branch 'phy-listing-link_topology-tracking'
git bisect bad 267e31750ae89f845cfe7df8f577b19482d9ef9b
# good: [992c287d87780abd184c67a303dec3361b7cb408] dt-bindings: net: snps,dwmac: Align 'snps,priority' type definition
git bisect good 992c287d87780abd184c67a303dec3361b7cb408
# good: [0ccf50df61f98a9f98d46524be4baa00c88c499d] Merge tag 'ath-next-20240402' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath
git bisect good 0ccf50df61f98a9f98d46524be4baa00c88c499d
# good: [0cd1453b7e55064d06b49eebe34ffb43748ba12e] mlxsw: pci: Remove mlxsw_pci_sdq_count()
git bisect good 0cd1453b7e55064d06b49eebe34ffb43748ba12e
# good: [da48a65f3ff4155364fb9e3efe0bfba58291da6b] bnxt_en: Fix PTP firmware timeout parameter
git bisect good da48a65f3ff4155364fb9e3efe0bfba58291da6b
# good: [ff8877b04ef282b2bdb16c9dccc2e42216a34f62] netlink: specs: ethtool: define header-flags as an enum
git bisect good ff8877b04ef282b2bdb16c9dccc2e42216a34f62
# good: [9f06f87fef689d28588cde8c7ebb00a67da34026] net: skbuff: generalize the skb->decrypted bit
git bisect good 9f06f87fef689d28588cde8c7ebb00a67da34026
# bad: [0ec5ed6c130e3906ba4ec82d740444a21504fbbf] net: sfp: pass the phy_device when disconnecting an sfp module's PHY
git bisect bad 0ec5ed6c130e3906ba4ec82d740444a21504fbbf
# good: [d133ef1ee2a256ba5a589493cd28dccfede6af11] net: phy: marvell: implement cable test for 88E1111
git bisect good d133ef1ee2a256ba5a589493cd28dccfede6af11
# bad: [6916e461e7933d3d003441291c543938f2ccb371] net: phy: Introduce ethernet link topology representation
git bisect bad 6916e461e7933d3d003441291c543938f2ccb371
# first bad commit: [6916e461e7933d3d003441291c543938f2ccb371] net: phy: Introduce ethernet link topology representation
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