AI Trajectory

null

{
  "EnableConfigs": [
    "USB_USBNET",
    "USB_NET_AX8817X",
    "USB_LAN78XX"
  ],
  "FocusSymbols": [
    "phylink_ethtool_ksettings_set"
  ],
  "Reasoning": "The patch adds a validation check in phylink_ethtool_ksettings_set to ensure that the requested speed and duplex settings are supported by the PHY capabilities before applying them. This prevents invalid configurations from being set via ethtool. The code is reachable in virtualized environments through USB network drivers that use phylink (e.g., ASIX, LAN78XX) which can be emulated via USB gadget/dummy_hcd.",
  "WorthFuzzing": true
}

null

{
  "PatchDiff": "commit 66203a12c4c817c7171a22b8b7a20eb9925bc2f4\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Jul 1 08:19:26 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c\nindex 087ac63f9193d7..22f9bbd381bd72 100644\n--- a/drivers/net/phy/phylink.c\n+++ b/drivers/net/phy/phylink.c\n@@ -2989,6 +2989,10 @@ int phylink_ethtool_ksettings_set(struct phylink *pl,\n \tif (pl-\u003ephydev) {\n \t\tstruct ethtool_link_ksettings phy_kset = *kset;\n \n+\t\tif (!phy_caps_lookup(kset-\u003ebase.speed, kset-\u003ebase.duplex,\n+\t\t\t\t     pl-\u003esupported, true))\n+\t\t\treturn -EINVAL;\n+\n \t\tlinkmode_and(phy_kset.link_modes.advertising,\n \t\t\t     phy_kset.link_modes.advertising,\n \t\t\t     pl-\u003esupported);\n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": [
    "USB_USBNET",
    "USB_NET_AX8817X",
    "USB_LAN78XX"
  ],
  "FocusSymbols": [
    "phylink_ethtool_ksettings_set"
  ],
  "Reasoning": "The patch adds a validation check in phylink_ethtool_ksettings_set to ensure that the requested speed and duplex settings are supported by the PHY capabilities before applying them. This prevents invalid configurations from being set via ethtool. The code is reachable in virtualized environments through USB network drivers that use phylink (e.g., ASIX, LAN78XX) which can be emulated via USB gadget/dummy_hcd.",
  "WorthFuzzing": true
}

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Do not list too generic configs (we already have them enabled). Only list those that
   specifically cover the modified code. List them in the EnableConfigs output array,
   and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

For your convenience, here is the diff of the changes:
commit 66203a12c4c817c7171a22b8b7a20eb9925bc2f4
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Jul 1 08:19:26 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 087ac63f9193d7..22f9bbd381bd72 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -2989,6 +2989,10 @@ int phylink_ethtool_ksettings_set(struct phylink *pl,
 	if (pl->phydev) {
 		struct ethtool_link_ksettings phy_kset = *kset;
 
+		if (!phy_caps_lookup(kset->base.speed, kset->base.duplex,
+				     pl->supported, true))
+			return -EINVAL;
+
 		linkmode_and(phy_kset.link_modes.advertising,
 			     phy_kset.link_modes.advertising,
 			     pl->supported);

gemini-3.1-pro-preview

null

null

							input: 1876
							output: 41
							thoughts: 134
						

**Analyzing a PHYLink Patch**

Okay, so I'm looking at this patch for `drivers/net/phy/phylink.c`. The core of the change seems to be in the `phylink_ethtool_ksettings_set` function. They've added a validation check right here:

```c
		if (!phy_caps_lookup(kset->base.speed, kset->base.duplex,
				     pl->supported, true))
			return -EINVAL;
```

Essentially, they're introducing a check to ensure the requested speed and duplex settings are actually *supported* by the PHY before applying the ethtool ksettings. This is a clear functional enhancement.  They're using `phy_caps_lookup` to perform this validation, which I'll need to dig into. It's good practice to validate these settings, preventing unexpected behavior or errors later on. I'll need to confirm what `pl->supported` refers to in this context. Is it the intersection of capabilities advertised by both PHY and MAC? Or the capabilities from one side? Let me dive deeper to ensure this works as expected and doesn't introduce any regressions.

{
  "Expression": "phylink_ethtool_ksettings_set",
  "PathPrefix": "drivers/net/phy/phylink.c"
}

{
  "Output": "drivers/net/phy/phylink.c=2955=static bool phylink_validate_pcs_inband_autoneg(struct phylink *pl,\n--\ndrivers/net/phy/phylink.c-2975-/**\ndrivers/net/phy/phylink.c:2976: * phylink_ethtool_ksettings_set() - set the link settings\ndrivers/net/phy/phylink.c-2977- * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n--\ndrivers/net/phy/phylink.c-2979- */\ndrivers/net/phy/phylink.c:2980:int phylink_ethtool_ksettings_set(struct phylink *pl,\ndrivers/net/phy/phylink.c-2981-\t\t\t\t  const struct ethtool_link_ksettings *kset)\n--\ndrivers/net/phy/phylink.c-3146-}\ndrivers/net/phy/phylink.c:3147:EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);\ndrivers/net/phy/phylink.c-3148-\n"
}

gemini-3.1-pro-preview

null

null

							input: 2607
							output: 31
							thoughts: 43
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Analyzing the Phylink and Ethtool Relationship**

Alright, so `phylink_ethtool_ksettings_set` is a key function, an exported symbol, right? That means it's designed to be used externally, primarily by network device drivers to interface with ethtool's settings. I need to understand its relationship to `phylink.c`. The next logical step is to figure out which configuration options actually *enable* `phylink.c` in the first place. Knowing the configuration dependencies will give me a better understanding of when and how this function is actually relevant in the broader network stack. It's time to dig into the build configurations and see what triggers the inclusion of that `phylink` module. This is all about tracing the dependency chain, and understanding where this ethtool function falls in the grand scheme of things.

{
  "Expression": "phylink.o",
  "PathPrefix": "drivers/net/phy/Makefile"
}

{
  "Output": "drivers/net/phy/Makefile=18=obj-$(CONFIG_PHYLIB)\t\t+= mdio_bus.o\ndrivers/net/phy/Makefile:19:obj-$(CONFIG_PHYLINK)\t\t+= phylink.o\ndrivers/net/phy/Makefile-20-obj-$(CONFIG_PHYLIB)\t\t+= libphy.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 2978
							output: 25
							thoughts: 25
						

Here's my summary, as though I'm thinking through this process:

**Diving into PHYLINK Configuration**

Okay, so the current configuration I'm working with is `PHYLINK`. Right, got it. Now, given that it's `PHYLINK`, I need to immediately understand its capabilities. My next logical step is to consult `phy_caps_lookup`. That function is critical in providing me with a specific, concise and focused view of all the features and limitations this `PHYLINK` configuration entails. I need to understand this thoroughly, especially given that PHYLINK will define my further decisions.

{
  "Expression": "phy_caps_lookup",
  "PathPrefix": ""
}

{
  "Output": "drivers/net/phy/phy-caps.h=55=const struct link_capabilities *\ndrivers/net/phy/phy-caps.h:56:phy_caps_lookup_by_linkmode(const unsigned long *linkmodes);\ndrivers/net/phy/phy-caps.h-57-\ndrivers/net/phy/phy-caps.h=58=const struct link_capabilities *\ndrivers/net/phy/phy-caps.h:59:phy_caps_lookup_by_linkmode_rev(const unsigned long *linkmodes, bool fdx_only);\ndrivers/net/phy/phy-caps.h-60-\ndrivers/net/phy/phy-caps.h=61=const struct link_capabilities *\ndrivers/net/phy/phy-caps.h:62:phy_caps_lookup(int speed, unsigned int duplex, const unsigned long *supported,\ndrivers/net/phy/phy-caps.h-63-\t\tbool exact);\n--\ndrivers/net/phy/phy-core.c=342=void phy_resolve_aneg_linkmode(struct phy_device *phydev)\n--\ndrivers/net/phy/phy-core.c-348-\ndrivers/net/phy/phy-core.c:349:\tc = phy_caps_lookup_by_linkmode(common);\ndrivers/net/phy/phy-core.c-350-\tif (c) {\n--\ndrivers/net/phy/phy-core.c=368=void phy_check_downshift(struct phy_device *phydev)\n--\ndrivers/net/phy/phy-core.c-381-\ndrivers/net/phy/phy-core.c:382:\tc = phy_caps_lookup_by_linkmode(common);\ndrivers/net/phy/phy-core.c-383-\tif (c)\n--\ndrivers/net/phy/phy-core.c=395=static int phy_resolve_min_speed(struct phy_device *phydev, bool fdx_only)\n--\ndrivers/net/phy/phy-core.c-401-\ndrivers/net/phy/phy-core.c:402:\tc = phy_caps_lookup_by_linkmode_rev(common, fdx_only);\ndrivers/net/phy/phy-core.c-403-\tif (c)\n--\ndrivers/net/phy/phy.c=256=static void phy_sanitize_settings(struct phy_device *phydev)\n--\ndrivers/net/phy/phy.c-259-\ndrivers/net/phy/phy.c:260:\tc = phy_caps_lookup(phydev-\u003espeed, phydev-\u003eduplex, phydev-\u003esupported,\ndrivers/net/phy/phy.c-261-\t\t\t    false);\n--\ndrivers/net/phy/phy_caps.c=122=size_t phy_caps_speeds(unsigned int *speeds, size_t size,\n--\ndrivers/net/phy/phy_caps.c-140-/**\ndrivers/net/phy/phy_caps.c:141: * phy_caps_lookup_by_linkmode() - Lookup the fastest matching link_capabilities\ndrivers/net/phy/phy_caps.c-142- * @linkmodes: Linkmodes to match against\n--\ndrivers/net/phy/phy_caps.c=148=const struct link_capabilities *\ndrivers/net/phy/phy_caps.c:149:phy_caps_lookup_by_linkmode(const unsigned long *linkmodes)\ndrivers/net/phy/phy_caps.c-150-{\n--\ndrivers/net/phy/phy_caps.c-160-/**\ndrivers/net/phy/phy_caps.c:161: * phy_caps_lookup_by_linkmode_rev() - Lookup the slowest matching link_capabilities\ndrivers/net/phy/phy_caps.c-162- * @linkmodes: Linkmodes to match against\n--\ndrivers/net/phy/phy_caps.c=169=const struct link_capabilities *\ndrivers/net/phy/phy_caps.c:170:phy_caps_lookup_by_linkmode_rev(const unsigned long *linkmodes, bool fdx_only)\ndrivers/net/phy/phy_caps.c-171-{\n--\ndrivers/net/phy/phy_caps.c-185-/**\ndrivers/net/phy/phy_caps.c:186: * phy_caps_lookup() - Lookup capabilities by speed/duplex that matches a mask\ndrivers/net/phy/phy_caps.c-187- * @speed: Speed to match\n--\ndrivers/net/phy/phy_caps.c=209=const struct link_capabilities *\ndrivers/net/phy/phy_caps.c:210:phy_caps_lookup(int speed, unsigned int duplex, const unsigned long *supported,\ndrivers/net/phy/phy_caps.c-211-\t\tbool exact)\n--\ndrivers/net/phy/phy_caps.c-235-}\ndrivers/net/phy/phy_caps.c:236:EXPORT_SYMBOL_GPL(phy_caps_lookup);\ndrivers/net/phy/phy_caps.c-237-\n--\ndrivers/net/phy/phy_device.c=2309=int __genphy_config_aneg(struct phy_device *phydev, bool changed)\n--\ndrivers/net/phy/phy_device.c-2337-\ndrivers/net/phy/phy_device.c:2338:\t\tc = phy_caps_lookup(phydev-\u003espeed, phydev-\u003eduplex,\ndrivers/net/phy/phy_device.c-2339-\t\t\t\t    phydev-\u003esupported, true);\n--\ndrivers/net/phy/phylink.c=660=static int phylink_parse_fixedlink(struct phylink *pl,\n--\ndrivers/net/phy/phylink.c-742-\ndrivers/net/phy/phylink.c:743:\tc = phy_caps_lookup(pl-\u003elink_config.speed, pl-\u003elink_config.duplex,\ndrivers/net/phy/phylink.c-744-\t\t\t    pl-\u003esupported, true);\n--\ndrivers/net/phy/phylink.c=1801=int phylink_set_fixed_link(struct phylink *pl,\n--\ndrivers/net/phy/phylink.c-1810-\ndrivers/net/phy/phylink.c:1811:\tc = phy_caps_lookup(state-\u003espeed, state-\u003eduplex,\ndrivers/net/phy/phylink.c-1812-\t\t\t    pl-\u003esupported, true);\n--\ndrivers/net/phy/phylink.c=2980=int phylink_ethtool_ksettings_set(struct phylink *pl,\n--\ndrivers/net/phy/phylink.c-2991-\ndrivers/net/phy/phylink.c:2992:\t\tif (!phy_caps_lookup(kset-\u003ebase.speed, kset-\u003ebase.duplex,\ndrivers/net/phy/phylink.c-2993-\t\t\t\t     pl-\u003esupported, true))\n--\ndrivers/net/phy/phylink.c-3031-\t\t */\ndrivers/net/phy/phylink.c:3032:\t\tc = phy_caps_lookup(kset-\u003ebase.speed, kset-\u003ebase.duplex,\ndrivers/net/phy/phylink.c-3033-\t\t\t\t    pl-\u003esupported, false);\n"
}

gemini-3.1-pro-preview

null

null

							input: 5023
							output: 28
							thoughts: 114
						

**Analyzing the `phylink_ethtool_ksettings_set` Patch**

Okay, so this patch introduces a `phy_caps_lookup` check within `phylink_ethtool_ksettings_set`. This function is, of course, accessible through ethtool's ioctls and netlink commands, specifically for network devices that leverage phylink. My immediate concern, as always when dealing with kernel-level changes, is the scope of this. I need to think about potential attack surfaces and whether this new check introduces any new vulnerabilities or weaknesses.

Could this be triggered in virtualized environments? Hmm, it's certainly plausible. We have virtual network drivers and perhaps even dummy drivers that might integrate phylink in their design. I need to consider that, or we could always fuzz the ethtool netlink/ioctl interface on various devices and see if we can trigger the check.

The next point I need to consider is whether a virtual driver currently uses phylink. I need to make sure that I understand the implementation correctly. I will have to start by checking which drivers are currently using phylink, to determine the likelihood of a virtual driver being included.

{
  "Expression": "phylink_create",
  "PathPrefix": "drivers/net/"
}

{
  "Output": "drivers/net/ethernet/altera/altera_tse_main.c=1128=static int altera_tse_probe(struct platform_device *pdev)\n--\ndrivers/net/ethernet/altera/altera_tse_main.c-1415-\ndrivers/net/ethernet/altera/altera_tse_main.c:1416:\tpriv-\u003ephylink = phylink_create(\u0026priv-\u003ephylink_config,\ndrivers/net/ethernet/altera/altera_tse_main.c-1417-\t\t\t\t       of_fwnode_handle(priv-\u003edevice-\u003eof_node),\n--\ndrivers/net/ethernet/atheros/ag71xx.c=1074=static int ag71xx_phylink_setup(struct ag71xx *ag)\n--\ndrivers/net/ethernet/atheros/ag71xx.c-1108-\ndrivers/net/ethernet/atheros/ag71xx.c:1109:\tphylink = phylink_create(\u0026ag-\u003ephylink_config, ag-\u003epdev-\u003edev.fwnode,\ndrivers/net/ethernet/atheros/ag71xx.c-1110-\t\t\t\t ag-\u003ephy_if_mode, \u0026ag71xx_phylink_mac_ops);\n--\ndrivers/net/ethernet/cadence/macb_main.c=1023=static int macb_mii_probe(struct net_device *dev)\n--\ndrivers/net/ethernet/cadence/macb_main.c-1085-\ndrivers/net/ethernet/cadence/macb_main.c:1086:\tbp-\u003ephylink = phylink_create(\u0026bp-\u003ephylink_config, bp-\u003epdev-\u003edev.fwnode,\ndrivers/net/ethernet/cadence/macb_main.c-1087-\t\t\t\t     bp-\u003ephy_interface, \u0026macb_phylink_ops);\n--\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c=202=static int dpaa_netdev_init(struct net_device *net_dev,\n--\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c-275-\tmac_dev-\u003eupdate_speed = dpaa_eth_cgr_set_speed;\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c:276:\tmac_dev-\u003ephylink = phylink_create(\u0026mac_dev-\u003ephylink_config,\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c-277-\t\t\t\t\t  dev_fwnode(mac_dev-\u003edev),\n--\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c=560=int dpaa2_mac_connect(struct dpaa2_mac *mac)\n--\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c-624-\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c:625:\tphylink = phylink_create(\u0026mac-\u003ephylink_config,\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c-626-\t\t\t\t dpmac_node, mac-\u003eif_mode,\n--\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c=971=static int enetc4_link_init(struct enetc_ndev_priv *priv,\n--\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-989-\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c:990:\terr = enetc_phylink_create(priv, node, \u0026enetc_pl_mac_ops);\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-991-\tif (err) {\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-992-\t\tdev_err(dev, \"Failed to create phylink\\n\");\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c:993:\t\tgoto err_phylink_create;\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-994-\t}\n--\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-997-\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c:998:err_phylink_create:\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-999-\tenetc_mdiobus_destroy(pf);\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c=847=static int enetc_pf_probe(struct pci_dev *pdev,\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-929-\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c:930:\terr = enetc_phylink_create(priv, node, \u0026enetc_mac_phylink_ops);\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-931-\tif (err)\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c:932:\t\tgoto err_phylink_create;\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-933-\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-941-\tenetc_phylink_destroy(priv);\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c:942:err_phylink_create:\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-943-\tenetc_mdiobus_destroy(pf);\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c=312=EXPORT_SYMBOL_GPL(enetc_mdiobus_destroy);\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-313-\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c:314:int enetc_phylink_create(struct enetc_ndev_priv *priv, struct device_node *node,\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-315-\t\t\t const struct phylink_mac_ops *ops)\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-337-\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c:338:\tphylink = phylink_create(\u0026pf-\u003ephylink_config, of_fwnode_handle(node),\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-339-\t\t\t\t pf-\u003eif_mode, ops);\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-348-}\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c:349:EXPORT_SYMBOL_GPL(enetc_phylink_create);\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-350-\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.h=12=void enetc_mdiobus_destroy(struct enetc_pf *pf);\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.h:13:int enetc_phylink_create(struct enetc_ndev_priv *priv, struct device_node *node,\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.h-14-\t\t\t const struct phylink_mac_ops *ops);\n--\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c=853=static int fs_enet_probe(struct platform_device *ofdev)\n--\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-932-\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c:933:\tphylink = phylink_create(\u0026fep-\u003ephylink_config, dev_fwnode(fep-\u003edev),\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-934-\t\t\t\t phy_mode, \u0026fs_enet_phylink_mac_ops);\n--\ndrivers/net/ethernet/freescale/ucc_geth.c=3419=static int ucc_geth_probe(struct platform_device* ofdev)\n--\ndrivers/net/ethernet/freescale/ucc_geth.c-3573-\ndrivers/net/ethernet/freescale/ucc_geth.c:3574:\tphylink = phylink_create(\u0026ugeth-\u003ephylink_config, dev_fwnode(\u0026dev-\u003edev),\ndrivers/net/ethernet/freescale/ucc_geth.c-3575-\t\t\t\t phy_interface, \u0026ugeth_mac_ops);\n--\ndrivers/net/ethernet/marvell/mvneta.c=5480=static int mvneta_probe(struct platform_device *pdev)\n--\ndrivers/net/ethernet/marvell/mvneta.c-5598-\ndrivers/net/ethernet/marvell/mvneta.c:5599:\tphylink = phylink_create(\u0026pp-\u003ephylink_config, pdev-\u003edev.fwnode,\ndrivers/net/ethernet/marvell/mvneta.c-5600-\t\t\t\t phy_mode, \u0026mvneta_phylink_ops);\n--\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c=6840=static int mvpp2_port_probe(struct platform_device *pdev,\n--\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c-7147-\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c:7148:\t\tphylink = phylink_create(\u0026port-\u003ephylink_config, port_fwnode,\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c-7149-\t\t\t\t\t phy_mode, \u0026mvpp2_phylink_ops);\n--\ndrivers/net/ethernet/marvell/prestera/prestera_main.c=370=static int prestera_port_sfp_bind(struct prestera_port *port)\n--\ndrivers/net/ethernet/marvell/prestera/prestera_main.c-416-\ndrivers/net/ethernet/marvell/prestera/prestera_main.c:417:\t\tphy_link = phylink_create(\u0026port-\u003ephy_config, fwnode,\ndrivers/net/ethernet/marvell/prestera/prestera_main.c-418-\t\t\t\t\t  PHY_INTERFACE_MODE_INTERNAL,\n--\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c=4823=static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)\n--\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c-4967-\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c:4968:\tphylink = phylink_create(\u0026mac-\u003ephylink_config,\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c-4969-\t\t\t\t of_fwnode_handle(mac-\u003eof_node),\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.c=746=struct net_device *fbnic_netdev_alloc(struct fbnic_dev *fbd)\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.c-834-\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.c:835:\tif (fbnic_phylink_create(netdev)) {\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.c-836-\t\tfree_netdev(netdev);\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.h=111=int fbnic_phylink_get_fecparam(struct net_device *netdev,\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.h-112-\t\t\t       struct ethtool_fecparam *fecparam);\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.h:113:int fbnic_phylink_create(struct net_device *netdev);\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.h-114-void fbnic_phylink_destroy(struct net_device *netdev);\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c=177=static const struct phylink_mac_ops fbnic_phylink_mac_ops = {\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-186-/**\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c:187: * fbnic_phylink_create - Phylink device creation\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-188- * @netdev: Network Device struct to attach phylink device\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-196- **/\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c:197:int fbnic_phylink_create(struct net_device *netdev)\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-198-{\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-231-\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c:232:\tphylink = phylink_create(\u0026fbn-\u003ephylink_config, NULL,\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-233-\t\t\t\t fbnic_phylink_select_interface(fbn-\u003eaui),\n--\ndrivers/net/ethernet/microchip/lan743x_main.c=3142=static const struct phylink_mac_ops lan743x_phylink_mac_ops = {\n--\ndrivers/net/ethernet/microchip/lan743x_main.c-3149-\ndrivers/net/ethernet/microchip/lan743x_main.c:3150:static int lan743x_phylink_create(struct lan743x_adapter *adapter)\ndrivers/net/ethernet/microchip/lan743x_main.c-3151-{\n--\ndrivers/net/ethernet/microchip/lan743x_main.c-3192-\ndrivers/net/ethernet/microchip/lan743x_main.c:3193:\tpl = phylink_create(\u0026adapter-\u003ephylink_config, NULL,\ndrivers/net/ethernet/microchip/lan743x_main.c-3194-\t\t\t    adapter-\u003ephy_interface, \u0026lan743x_phylink_mac_ops);\n--\ndrivers/net/ethernet/microchip/lan743x_main.c=3664=static int lan743x_pcidev_probe(struct pci_dev *pdev,\n--\ndrivers/net/ethernet/microchip/lan743x_main.c-3723-\ndrivers/net/ethernet/microchip/lan743x_main.c:3724:\tret = lan743x_phylink_create(adapter);\ndrivers/net/ethernet/microchip/lan743x_main.c-3725-\tif (ret \u003c 0) {\n--\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c=791=static int lan966x_probe_port(struct lan966x *lan966x, u32 p,\n--\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c-855-\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c:856:\tphylink = phylink_create(\u0026port-\u003ephylink_config,\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c-857-\t\t\t\t portnp,\n--\ndrivers/net/ethernet/microchip/sparx5/sparx5_main.c=312=static int sparx5_create_port(struct sparx5 *sparx5,\n--\ndrivers/net/ethernet/microchip/sparx5/sparx5_main.c-388-\ndrivers/net/ethernet/microchip/sparx5/sparx5_main.c:389:\tphylink = phylink_create(\u0026spx5_port-\u003ephylink_config,\ndrivers/net/ethernet/microchip/sparx5/sparx5_main.c-390-\t\t\t\t of_fwnode_handle(config-\u003enode),\n--\ndrivers/net/ethernet/mscc/ocelot_net.c=1774=static const struct phylink_mac_ops ocelot_phylink_ops = {\n--\ndrivers/net/ethernet/mscc/ocelot_net.c-1779-\ndrivers/net/ethernet/mscc/ocelot_net.c:1780:static int ocelot_port_phylink_create(struct ocelot *ocelot, int port,\ndrivers/net/ethernet/mscc/ocelot_net.c-1781-\t\t\t\t      struct device_node *portnp)\n--\ndrivers/net/ethernet/mscc/ocelot_net.c-1820-\ndrivers/net/ethernet/mscc/ocelot_net.c:1821:\tphylink = phylink_create(\u0026priv-\u003ephylink_config,\ndrivers/net/ethernet/mscc/ocelot_net.c-1822-\t\t\t\t of_fwnode_handle(portnp),\n--\ndrivers/net/ethernet/mscc/ocelot_net.c=1843=int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *target,\n--\ndrivers/net/ethernet/mscc/ocelot_net.c-1879-\ndrivers/net/ethernet/mscc/ocelot_net.c:1880:\terr = ocelot_port_phylink_create(ocelot, port, portnp);\ndrivers/net/ethernet/mscc/ocelot_net.c-1881-\tif (err)\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c=1387=static int stmmac_phylink_setup(struct stmmac_priv *priv)\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-1478-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1479:\tphylink = phylink_create(config, dev_fwnode(priv-\u003edevice),\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-1480-\t\t\t\t priv-\u003eplat-\u003ephy_interface,\n--\ndrivers/net/ethernet/tehuti/tn40_phy.c=45=int tn40_phy_register(struct tn40_priv *priv)\n--\ndrivers/net/ethernet/tehuti/tn40_phy.c-62-\ndrivers/net/ethernet/tehuti/tn40_phy.c:63:\tphylink = phylink_create(config, NULL, PHY_INTERFACE_MODE_XAUI,\ndrivers/net/ethernet/tehuti/tn40_phy.c-64-\t\t\t\t \u0026tn40_mac_ops);\n--\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c=2757=am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)\n--\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c-2841-\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c:2842:\tphylink = phylink_create(\u0026port-\u003eslave.phylink_config,\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c-2843-\t\t\t\t of_fwnode_handle(port-\u003eslave.port_np),\n--\ndrivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c=130=static int ngbe_phylink_init(struct wx *wx)\n--\ndrivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c-149-\ndrivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c:150:\tphylink = phylink_create(config, NULL, phy_mode, \u0026ngbe_mac_ops);\ndrivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c-151-\tif (IS_ERR(phylink))\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_aml.c=480=int txgbe_phylink_init_aml(struct txgbe *txgbe)\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_aml.c-510-\ndrivers/net/ethernet/wangxun/txgbe/txgbe_aml.c:511:\tphylink = phylink_create(config, NULL, phy_mode, \u0026txgbe_mac_ops_aml);\ndrivers/net/ethernet/wangxun/txgbe/txgbe_aml.c-512-\tif (IS_ERR(phylink))\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_phy.c=268=static int txgbe_phylink_init(struct txgbe *txgbe)\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_phy.c-292-\ndrivers/net/ethernet/wangxun/txgbe/txgbe_phy.c:293:\tphylink = phylink_create(config, fwnode, phy_mode, \u0026txgbe_mac_ops);\ndrivers/net/ethernet/wangxun/txgbe/txgbe_phy.c-294-\tif (IS_ERR(phylink))\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c=2795=static int axienet_probe(struct platform_device *pdev)\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-3117-\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c:3118:\tlp-\u003ephylink = phylink_create(\u0026lp-\u003ephylink_config, pdev-\u003edev.fwnode,\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-3119-\t\t\t\t     lp-\u003ephy_mode,\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-3122-\t\tret = PTR_ERR(lp-\u003ephylink);\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c:3123:\t\tdev_err(\u0026pdev-\u003edev, \"phylink_create error (%i)\\n\", ret);\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-3124-\t\tgoto cleanup_mdio;\n--\ndrivers/net/phy/phylink.c=516=static int phylink_validate_mac_and_pcs(struct phylink *pl,\n--\ndrivers/net/phy/phylink.c-531-\tif (pcs) {\ndrivers/net/phy/phylink.c:532:\t\t/* The PCS, if present, must be setup before phylink_create()\ndrivers/net/phy/phylink.c-533-\t\t * has been called. If the ops is not initialised, print an\n--\ndrivers/net/phy/phylink.c=1039=static enum inband_type phylink_get_inband_type(phy_interface_t interface)\n--\ndrivers/net/phy/phylink.c-1070- * phylink_pcs_neg_mode() - helper to determine PCS inband mode\ndrivers/net/phy/phylink.c:1071: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-1072- * @pcs: a pointer to \u0026struct phylink_pcs\n--\ndrivers/net/phy/phylink.c=1768=static int phylink_register_sfp(struct phylink *pl,\n--\ndrivers/net/phy/phylink.c-1792- * phylink_set_fixed_link() - set the fixed link\ndrivers/net/phy/phylink.c:1793: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-1794- * @state: a pointer to a struct phylink_link_state.\n--\ndrivers/net/phy/phylink.c=1830=EXPORT_SYMBOL_GPL(phylink_set_fixed_link);\n--\ndrivers/net/phy/phylink.c-1832-/**\ndrivers/net/phy/phylink.c:1833: * phylink_create() - create a phylink instance\ndrivers/net/phy/phylink.c-1834- * @config: a pointer to the target \u0026struct phylink_config\n--\ndrivers/net/phy/phylink.c-1847- */\ndrivers/net/phy/phylink.c:1848:struct phylink *phylink_create(struct phylink_config *config,\ndrivers/net/phy/phylink.c-1849-\t\t\t       const struct fwnode_handle *fwnode,\n--\ndrivers/net/phy/phylink.c-1934-}\ndrivers/net/phy/phylink.c:1935:EXPORT_SYMBOL_GPL(phylink_create);\ndrivers/net/phy/phylink.c-1936-\n--\ndrivers/net/phy/phylink.c-1938- * phylink_destroy() - cleanup and destroy the phylink instance\ndrivers/net/phy/phylink.c:1939: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-1940- *\n--\ndrivers/net/phy/phylink.c=1955=EXPORT_SYMBOL_GPL(phylink_destroy);\n--\ndrivers/net/phy/phylink.c-1958- * phylink_expects_phy() - Determine if phylink expects a phy to be attached\ndrivers/net/phy/phylink.c:1959: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-1960- *\n--\ndrivers/net/phy/phylink.c=2204=static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy,\n--\ndrivers/net/phy/phylink.c-2224- * phylink_connect_phy() - connect a PHY to the phylink instance\ndrivers/net/phy/phylink.c:2225: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2226- * @phy: a pointer to a \u0026struct phy_device.\n--\ndrivers/net/phy/phylink.c=2258=EXPORT_SYMBOL_GPL(phylink_connect_phy);\n--\ndrivers/net/phy/phylink.c-2261- * phylink_of_phy_connect() - connect the PHY specified in the DT mode.\ndrivers/net/phy/phylink.c:2262: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2263- * @dn: a pointer to a \u0026struct device_node.\n--\ndrivers/net/phy/phylink.c=2277=EXPORT_SYMBOL_GPL(phylink_of_phy_connect);\n--\ndrivers/net/phy/phylink.c-2280- * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode.\ndrivers/net/phy/phylink.c:2281: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2282- * @fwnode: a pointer to a \u0026struct fwnode_handle.\n--\ndrivers/net/phy/phylink.c=2336=EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect);\n--\ndrivers/net/phy/phylink.c-2340- *   instance.\ndrivers/net/phy/phylink.c:2341: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2342- *\n--\ndrivers/net/phy/phylink.c=2371=static void phylink_link_changed(struct phylink *pl, bool up, const char *what)\n--\ndrivers/net/phy/phylink.c-2380- * phylink_mac_change() - notify phylink of a change in MAC state\ndrivers/net/phy/phylink.c:2381: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2382- * @up: indicates whether the link is currently up.\n--\ndrivers/net/phy/phylink.c=2413=static irqreturn_t phylink_link_handler(int irq, void *data)\n--\ndrivers/net/phy/phylink.c-2423- * phylink_start() - start a phylink instance\ndrivers/net/phy/phylink.c:2424: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2425- *\n--\ndrivers/net/phy/phylink.c=2486=EXPORT_SYMBOL_GPL(phylink_start);\n--\ndrivers/net/phy/phylink.c-2489- * phylink_stop() - stop a phylink instance\ndrivers/net/phy/phylink.c:2490: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2491- *\n--\ndrivers/net/phy/phylink.c=2520=EXPORT_SYMBOL_GPL(phylink_stop);\n--\ndrivers/net/phy/phylink.c-2523- * phylink_rx_clk_stop_block() - block PHY ability to stop receive clock in LPI\ndrivers/net/phy/phylink.c:2524: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2525- *\n--\ndrivers/net/phy/phylink.c=2549=EXPORT_SYMBOL_GPL(phylink_rx_clk_stop_block);\n--\ndrivers/net/phy/phylink.c-2552- * phylink_rx_clk_stop_unblock() - unblock PHY ability to stop receive clock\ndrivers/net/phy/phylink.c:2553: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2554- *\n--\ndrivers/net/phy/phylink.c=2591=static bool phylink_phy_pm_speed_ctrl(struct phylink *pl)\n--\ndrivers/net/phy/phylink.c-2598- * phylink_suspend() - handle a network device suspend event\ndrivers/net/phy/phylink.c:2599: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2600- * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan\n--\ndrivers/net/phy/phylink.c=2650=EXPORT_SYMBOL_GPL(phylink_suspend);\n--\ndrivers/net/phy/phylink.c-2653- * phylink_prepare_resume() - prepare to resume a network device\ndrivers/net/phy/phylink.c:2654: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2655- *\n--\ndrivers/net/phy/phylink.c=2675=EXPORT_SYMBOL_GPL(phylink_prepare_resume);\n--\ndrivers/net/phy/phylink.c-2678- * phylink_resume() - handle a network device resume event\ndrivers/net/phy/phylink.c:2679: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2680- *\n--\ndrivers/net/phy/phylink.c=2718=EXPORT_SYMBOL_GPL(phylink_resume);\n--\ndrivers/net/phy/phylink.c-2721- * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY\ndrivers/net/phy/phylink.c:2722: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2723- * @wol: a pointer to \u0026struct ethtool_wolinfo to hold the read parameters\n--\ndrivers/net/phy/phylink.c=2755=EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);\n--\ndrivers/net/phy/phylink.c-2758- * phylink_ethtool_set_wol() - set wake on lan parameters\ndrivers/net/phy/phylink.c:2759: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2760- * @wol: a pointer to \u0026struct ethtool_wolinfo for the desired parameters\n--\ndrivers/net/phy/phylink.c=2887=static void phylink_get_ksettings(const struct phylink_link_state *state,\n--\ndrivers/net/phy/phylink.c-2902- * phylink_ethtool_ksettings_get() - get the current link settings\ndrivers/net/phy/phylink.c:2903: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2904- * @kset: a pointer to a \u0026struct ethtool_link_ksettings to hold link settings\n--\ndrivers/net/phy/phylink.c=2955=static bool phylink_validate_pcs_inband_autoneg(struct phylink *pl,\n--\ndrivers/net/phy/phylink.c-2976- * phylink_ethtool_ksettings_set() - set the link settings\ndrivers/net/phy/phylink.c:2977: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2978- * @kset: a pointer to a \u0026struct ethtool_link_ksettings for the desired modes\n--\ndrivers/net/phy/phylink.c=3147=EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);\n--\ndrivers/net/phy/phylink.c-3150- * phylink_ethtool_nway_reset() - restart negotiation\ndrivers/net/phy/phylink.c:3151: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3152- *\n--\ndrivers/net/phy/phylink.c=3172=EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);\n--\ndrivers/net/phy/phylink.c-3175- * phylink_ethtool_get_pauseparam() - get the current pause parameters\ndrivers/net/phy/phylink.c:3176: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3177- * @pause: a pointer to a \u0026struct ethtool_pauseparam\n--\ndrivers/net/phy/phylink.c=3188=EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);\n--\ndrivers/net/phy/phylink.c-3191- * phylink_ethtool_set_pauseparam() - set the current pause parameters\ndrivers/net/phy/phylink.c:3192: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3193- * @pause: a pointer to a \u0026struct ethtool_pauseparam\n--\ndrivers/net/phy/phylink.c=3274=EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);\n--\ndrivers/net/phy/phylink.c-3278- *   counter\ndrivers/net/phy/phylink.c:3279: * @pl: a pointer to a \u0026struct phylink returned from phylink_create().\ndrivers/net/phy/phylink.c-3280- *\n--\ndrivers/net/phy/phylink.c=3297=EXPORT_SYMBOL_GPL(phylink_get_eee_err);\n--\ndrivers/net/phy/phylink.c-3300- * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters\ndrivers/net/phy/phylink.c:3301: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3302- * @eee: a pointer to a \u0026struct ethtool_keee for the read parameters\n--\ndrivers/net/phy/phylink.c=3323=EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);\n--\ndrivers/net/phy/phylink.c-3326- * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters\ndrivers/net/phy/phylink.c:3327: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3328- * @eee: a pointer to a \u0026struct ethtool_keee for the desired parameters\n--\ndrivers/net/phy/phylink.c=3497=static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,\n--\ndrivers/net/phy/phylink.c-3515- * phylink_mii_ioctl() - generic mii ioctl interface\ndrivers/net/phy/phylink.c:3516: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3517- * @ifr: a pointer to a \u0026struct ifreq for socket ioctls\n--\ndrivers/net/phy/phylink.c=3590=EXPORT_SYMBOL_GPL(phylink_mii_ioctl);\n--\ndrivers/net/phy/phylink.c-3594- *   link partners\ndrivers/net/phy/phylink.c:3595: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3596- * @sync: perform action synchronously\n--\ndrivers/net/phy/phylink.c=3615=EXPORT_SYMBOL_GPL(phylink_speed_down);\n--\ndrivers/net/phy/phylink.c-3619- *   phylink_speed_down()\ndrivers/net/phy/phylink.c:3620: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3621- *\n--\ndrivers/net/phy/phylink.c=4372=EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);\n--\ndrivers/net/phy/phylink.c-4376- *\t\t\t\t which loses state\ndrivers/net/phy/phylink.c:4377: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-4378- *\n--\ndrivers/net/phy/phylink.c=4393=EXPORT_SYMBOL_GPL(phylink_replay_link_begin);\n--\ndrivers/net/phy/phylink.c-4397- *\t\t\t       which lost state\ndrivers/net/phy/phylink.c:4398: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-4399- *\n--\ndrivers/net/usb/asix_devices.c=799=static int ax88772_phylink_setup(struct usbnet *dev)\n--\ndrivers/net/usb/asix_devices.c-819-\ndrivers/net/usb/asix_devices.c:820:\tphylink = phylink_create(\u0026priv-\u003ephylink_config, dev-\u003enet-\u003edev.fwnode,\ndrivers/net/usb/asix_devices.c-821-\t\t\t\t phy_if_mode, \u0026ax88772_phylink_mac_ops);\n--\ndrivers/net/usb/lan78xx.c=2786=static int lan78xx_phylink_setup(struct lan78xx_net *dev)\n--\ndrivers/net/usb/lan78xx.c-2825-\ndrivers/net/usb/lan78xx.c:2826:\tphylink = phylink_create(pc, dev-\u003enet-\u003edev.fwnode,\ndrivers/net/usb/lan78xx.c-2827-\t\t\t\t dev-\u003einterface, \u0026lan78xx_phylink_mac_ops);\n"
}

gemini-3.1-pro-preview

null

null

							input: 16362
							output: 33
							thoughts: 127
						

**Reaching Network Driver Functionality in a Virtualized Environment**

Okay, so I've been looking at network drivers, specifically the `asix_devices.c` and `lan78xx.c` files in `drivers/net/usb/`. Aha, they're both using phylink! That's interesting, and it means they're handling PHY interactions for USB network interfaces. This is good news because these drivers are prime candidates for testing within a virtualized setup. With syzkaller, I should be able to emulate the USB host controller using either a dummy HCD or the vhci_hcd, making these drivers easily reachable.

The key function I want to focus on is `phylink_ethtool_ksettings_set`. This is triggered when someone attempts to configure the link settings using ethtool. I know that function is reachable within these drivers, as it's a known call point for ethtool settings.

Now, let me go back to `asix_devices.c`. I need to figure out which configuration options or parameters specifically enable the functionality that leads to calling `phylink_ethtool_ksettings_set`. This will guide my fuzzing efforts and help me understand the code path that's most likely to be exposed to vulnerabilities.

{
  "Expression": "asix_devices.o",
  "PathPrefix": "drivers/net/usb/Makefile"
}

{
  "Output": "drivers/net/usb/Makefile=13=obj-$(CONFIG_USB_NET_AX8817X)\t+= asix.o\ndrivers/net/usb/Makefile:14:asix-y := asix_devices.o asix_common.o ax88172a.o\ndrivers/net/usb/Makefile-15-obj-$(CONFIG_USB_NET_AX88179_178A)      += ax88179_178a.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 16927
							output: 33
							thoughts: 27
						

Here's my thought process, as it went:

**Examining Network Driver Configuration**

Okay, so the active configuration is `USB_NET_AX8817X`. Right, that's the driver for a specific USB-to-Ethernet adapter, likely based on the ASIX AX8817x chipset. My next step, as always, is to dive into the core implementation. I need to understand how this driver handles its interface with the USB stack and the network subsystem. Therefore, I need to check `lan78xx.c`. That's where the critical functionality will be defined. I'll need to scrutinize the initialization sequences, data transfer mechanisms, and interrupt handling within that file to see the details of its specific implementation.

{
  "Expression": "lan78xx.o",
  "PathPrefix": "drivers/net/usb/Makefile"
}

{
  "Output": "drivers/net/usb/Makefile=11=obj-$(CONFIG_USB_HSO)\t\t+= hso.o\ndrivers/net/usb/Makefile:12:obj-$(CONFIG_USB_LAN78XX)\t+= lan78xx.o\ndrivers/net/usb/Makefile-13-obj-$(CONFIG_USB_NET_AX8817X)\t+= asix.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 17254
							output: 32
							thoughts: 130
						

**Fuzzing the `phylink_ethtool_ksettings_set` Function**

Okay, so the current configuration is set to `USB_LAN78XX`. My task is to figure out the best way to fuzz this. It looks like the patch in question focuses on `phylink_ethtool_ksettings_set`. This is interesting because this function is accessible through ethtool ioctls. That means it’s an ideal target for fuzzing.

My initial thought was to focus fuzzing efforts on this function, but then it dawned on me... `phylink_ethtool_ksettings_set` is a *generic* function. Perhaps it would be more fruitful to expand my scope to the function itself. And is there anything specific to the phylink configuration? I know `PHYLINK` is selected by various drivers; I should probably look into that further. Let me check the `drivers/net/phy/Kconfig` file to see what details I can find on `PHYLINK`.

{
  "Expression": "config PHYLINK",
  "PathPrefix": "drivers/net/phy/Kconfig"
}

{
  "Output": "drivers/net/phy/Kconfig-5-\ndrivers/net/phy/Kconfig:6:config PHYLINK\ndrivers/net/phy/Kconfig-7-\ttristate\n"
}

gemini-3.1-pro-preview

null

null

							input: 17690
							output: 39
							thoughts: 108
						

**Enabling USB Network Drivers for Phylink Integration**

Okay, so we're dealing with a tristate configuration here, meaning the selection is based on some driver input. My initial thought is to ensure the necessary USB network drivers are available for phylink. Therefore, I need to enable both `USB_NET_AX8817X` and `USB_LAN78XX`. This should guarantee that phylink can be properly compiled and accessible through the USB network driver subsystem.

Let me just double-check that variable… ah, right, it's `CONFIG_USB_NET_AX8817X`. Always good to be precise when dealing with these kernel configs. Okay, I need to confirm the Kconfig's presence so I will check `drivers/net/usb/Kconfig` to confirm these settings are present and where they sit in the overall driver landscape.

{
  "Expression": "config USB_NET_AX8817X",
  "PathPrefix": "drivers/net/usb/Kconfig"
}

{
  "Output": "drivers/net/usb/Kconfig=132=config USB_USBNET\n--\ndrivers/net/usb/Kconfig-165-\ndrivers/net/usb/Kconfig:166:config USB_NET_AX8817X\ndrivers/net/usb/Kconfig-167-\ttristate \"ASIX AX88xxx Based USB 2.0 Ethernet Adapters\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 18131
							output: 35
							thoughts: 12
						

Okay, here's my take on those thoughts, tailored for an expert audience, and delivered as a first-person summary:

**Digging into `USB_LAN78XX`**

Alright, time to get to it. Let's see what we're dealing with here – let's specifically zero in on that `USB_LAN78XX` configuration. I need to refresh my memory on the current status of this particular integration. It's time to assess the current state.

{
  "Expression": "config USB_LAN78XX",
  "PathPrefix": "drivers/net/usb/Kconfig"
}

{
  "Output": "drivers/net/usb/Kconfig=99=config USB_RTL8152\n--\ndrivers/net/usb/Kconfig-112-\ndrivers/net/usb/Kconfig:113:config USB_LAN78XX\ndrivers/net/usb/Kconfig-114-\ttristate \"Microchip LAN78XX Based USB Ethernet Adapters\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 18385
							output: 29
							thoughts: 88
						

Here's my thought process on this network driver configuration:

**Network Driver Configuration - A Deep Dive**

Okay, so we're looking at enabling a couple of USB network drivers here: specifically, `USB_NET_AX8817X` and `USB_LAN78XX`. Those are pretty standard choices for USB-to-Ethernet adapters, I know them well. Given that, **PHYLINK** is the obvious choice to be selected for its underlying hardware abstraction layer. Now, before I commit to anything, I need to make sure we're not inadvertently stepping on any other drivers that might also depend on phylink, just to avoid any unexpected conflicts. Let's see... nothing immediately springs to mind, and I can't think of any other drivers that fit that pattern off the top of my head, but let's do a quick scan. Wireless is usually handled by `mac80211`, so I'll skip over that - I don't see any obvious connection. Okay, let's try a scan of the virtual drivers. Ah, yes, the `dummy` driver in `drivers/net/dummy.c`. That's not the same thing. I'll make sure to double check that I haven't forgotten anything else...but I think we're good to go.

no matches

{
  "Expression": "phylink",
  "PathPrefix": "drivers/net/dummy.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 18797
							output: 29
							thoughts: 15
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person:

**Navigating the Labyrinth of Code**

Hmm, just "No." doesn't give me much to go on. My internal compiler is already firing up, trying to understand the context... What's the problem? What's the area of interest? I need more information to formulate a proper response or plan of action.

Then, there's a specific file mentioned. Ah, okay, so we are talking about networking, specifically the TUN device, and the C code that implements it. My mind immediately starts pulling up associations: Kernel-level operations, packet handling, maybe something related to virtual interfaces, or maybe some issue in user space interaction. The question "What about `drivers/net/tun.c`?" is likely referring to some specific issue, bug, or area of concern. I'd be looking at its code to find out. We've honed in. This will be the focus.

no matches

{
  "Expression": "phylink",
  "PathPrefix": "drivers/net/tun.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 19069
							output: 30
							thoughts: 16
						

Okay, here's my summary, expressed as though I'm the one thinking it:

**Focusing My Attention**

No, that's not quite right. Wait... what about that `drivers/net/veth.c` file? I'm pretty sure it's relevant to this. It's time to take a look at the veth driver. I need to focus there, and make sure that this is the best path to follow.

no matches

{
  "Expression": "phylink",
  "PathPrefix": "drivers/net/veth.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 19227
							output: 41
							thoughts: 163
						

**Fuzzing the `phylink_ethtool_ksettings_set` Function**

Okay, so I'm thinking the best way to approach fuzzing this virtualized environment is through USB network drivers, given syzkaller's ability to emulate USB devices using `dummy_hcd`. But hold on, let's refocus. The modification seems to be specifically in the `phylink_ethtool_ksettings_set` function.

Now, should I expand the scope or focus? Let's quickly see if `phy_caps_lookup` is worth a look too. It's just a lookup, so probably not the primary target right now.

Right, the patch addresses a validation issue in `phylink_ethtool_ksettings_set` concerning speed and duplex. Perfect! That confirms it: `phylink_ethtool_ksettings_set` is *definitely* the function to fuzz. That's where the vulnerability lies.

Let's go straight to the source, and verify that function in `drivers/net/phy/phylink.c`. I need to understand this code properly before starting the fuzzing.

{
  "Expression": "phylink_ethtool_ksettings_set",
  "PathPrefix": "drivers/net/phy/phylink.c"
}

{
  "Output": "drivers/net/phy/phylink.c=2955=static bool phylink_validate_pcs_inband_autoneg(struct phylink *pl,\n--\ndrivers/net/phy/phylink.c-2975-/**\ndrivers/net/phy/phylink.c:2976: * phylink_ethtool_ksettings_set() - set the link settings\ndrivers/net/phy/phylink.c-2977- * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n--\ndrivers/net/phy/phylink.c-2979- */\ndrivers/net/phy/phylink.c:2980:int phylink_ethtool_ksettings_set(struct phylink *pl,\ndrivers/net/phy/phylink.c-2981-\t\t\t\t  const struct ethtool_link_ksettings *kset)\n--\ndrivers/net/phy/phylink.c-3146-}\ndrivers/net/phy/phylink.c:3147:EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);\ndrivers/net/phy/phylink.c-3148-\n"
}

gemini-3.1-pro-preview

null

null

							input: 19980
							output: 30
							thoughts: 486
						

**Analyzing the Phylink Patch**

Okay, so the main function this patch is targeting is `phylink_ethtool_ksettings_set`. That seems like the core of the change. Is there anything else? Ah, `phy_caps_lookup` is also mentioned, but it's just being *called* within the modified function, not directly altered. Let's make sure I understand the intent of this patch.

Right, the patch adds a validation step within `phylink_ethtool_ksettings_set`. Before applying the requested speed and duplex settings, it's checking with `phy_caps_lookup` to see if the PHY actually supports them. This makes sense; it's a guard against setting up configurations that the hardware can't handle. Prevents invalid configurations.

The code is reachable in virtualized environments. Specifically, the patch mentions USB network drivers leveraging phylink – things like ASIX and LAN78XX, and their emulated counterparts via USB gadget and dummy_hcd. These are good targets for testing and validation.

So, let's keep the focus on `phylink_ethtool_ksettings_set`. Key symbols: `phylink_ethtool_ksettings_set`.

I need to make sure my testing setup includes those drivers that use this function. Let's see... `USB_NET_AX8817X` – it looks like `drivers/net/usb/asix_devices.c` does indeed call `phylink_create`, so that's good. And `USB_LAN78XX` – yep, `drivers/net/usb/lan78xx.c` is also calling `phylink_create`.

Anything else I should consider? Ah, `USB_USBNET`. Since `USB_NET_AX8817X` depends on that, it makes sense to include it in the build configuration for testing and coverage. Syzkaller usually has `USB_USBNET` enabled, but I'll make sure to explicitly include it. Okay, that should be enough for now.

{
  "Expression": "depends on",
  "PathPrefix": "drivers/net/usb/Kconfig"
}

{
  "Output": "drivers/net/usb/Kconfig=5=comment \"Host-side USB support is needed for USB Network Adapter support\"\ndrivers/net/usb/Kconfig:6:\tdepends on !USB \u0026\u0026 NET\ndrivers/net/usb/Kconfig-7-\ndrivers/net/usb/Kconfig=8=menuconfig USB_NET_DRIVERS\n--\ndrivers/net/usb/Kconfig-10-\tdefault USB if USB\ndrivers/net/usb/Kconfig:11:\tdepends on USB \u0026\u0026 NET\ndrivers/net/usb/Kconfig-12-\n--\ndrivers/net/usb/Kconfig=166=config USB_NET_AX8817X\ndrivers/net/usb/Kconfig-167-\ttristate \"ASIX AX88xxx Based USB 2.0 Ethernet Adapters\"\ndrivers/net/usb/Kconfig:168:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-169-\tselect CRC32\n--\ndrivers/net/usb/Kconfig-194-\ndrivers/net/usb/Kconfig:195:\t  This driver creates an interface named \"ethX\", where X depends on\ndrivers/net/usb/Kconfig-196-\t  what other networking devices you have in use.\n--\ndrivers/net/usb/Kconfig=198=config USB_NET_AX88179_178A\ndrivers/net/usb/Kconfig-199-\ttristate \"ASIX AX88179/178A USB 3.0/2.0 to Gigabit Ethernet\"\ndrivers/net/usb/Kconfig:200:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-201-\tselect CRC32\n--\ndrivers/net/usb/Kconfig-212-\ndrivers/net/usb/Kconfig:213:\t  This driver creates an interface named \"ethX\", where X depends on\ndrivers/net/usb/Kconfig-214-\t  what other networking devices you have in use.\n--\ndrivers/net/usb/Kconfig=216=config USB_NET_CDCETHER\ndrivers/net/usb/Kconfig-217-\ttristate \"CDC Ethernet support (smart devices such as cable modems)\"\ndrivers/net/usb/Kconfig:218:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-219-\tdefault y\n--\ndrivers/net/usb/Kconfig-238-\ndrivers/net/usb/Kconfig:239:\t  This driver creates an interface named \"ethX\", where X depends on\ndrivers/net/usb/Kconfig-240-\t  what other networking devices you have in use.  However, if the\n--\ndrivers/net/usb/Kconfig=244=config USB_NET_CDC_EEM\ndrivers/net/usb/Kconfig-245-\ttristate \"CDC EEM support\"\ndrivers/net/usb/Kconfig:246:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-247-\thelp\n--\ndrivers/net/usb/Kconfig-252-\ndrivers/net/usb/Kconfig:253:\t  This driver creates an interface named \"ethX\", where X depends on\ndrivers/net/usb/Kconfig-254-\t  what other networking devices you have in use.  However, if the\n--\ndrivers/net/usb/Kconfig=258=config USB_NET_CDC_NCM\ndrivers/net/usb/Kconfig-259-\ttristate \"CDC NCM support\"\ndrivers/net/usb/Kconfig:260:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-261-\tselect USB_NET_CDCETHER\n--\ndrivers/net/usb/Kconfig=278=config USB_NET_HUAWEI_CDC_NCM\ndrivers/net/usb/Kconfig-279-\ttristate \"Huawei NCM embedded AT channel support\"\ndrivers/net/usb/Kconfig:280:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-281-\tselect USB_WDM\n--\ndrivers/net/usb/Kconfig=293=config USB_NET_CDC_MBIM\ndrivers/net/usb/Kconfig-294-\ttristate \"CDC MBIM support\"\ndrivers/net/usb/Kconfig:295:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-296-\tselect USB_WDM\n--\ndrivers/net/usb/Kconfig=311=config USB_NET_DM9601\ndrivers/net/usb/Kconfig-312-\ttristate \"Davicom DM96xx based USB 10/100 ethernet devices\"\ndrivers/net/usb/Kconfig:313:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-314-\tselect CRC32\n--\ndrivers/net/usb/Kconfig=319=config USB_NET_SR9700\ndrivers/net/usb/Kconfig-320-\ttristate \"CoreChip-sz SR9700 based USB 1.1 10/100 ethernet devices\"\ndrivers/net/usb/Kconfig:321:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-322-\thelp\n--\ndrivers/net/usb/Kconfig=326=config USB_NET_SR9800\ndrivers/net/usb/Kconfig-327-\ttristate \"CoreChip-sz SR9800 based USB 2.0 10/100 ethernet devices\"\ndrivers/net/usb/Kconfig:328:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-329-\tselect CRC32\n--\ndrivers/net/usb/Kconfig=341=config USB_NET_SMSC75XX\ndrivers/net/usb/Kconfig-342-\ttristate \"SMSC LAN75XX based USB 2.0 gigabit ethernet devices\"\ndrivers/net/usb/Kconfig:343:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-344-\tselect BITREVERSE\n--\ndrivers/net/usb/Kconfig=351=config USB_NET_SMSC95XX\ndrivers/net/usb/Kconfig-352-\ttristate \"SMSC LAN95XX based USB 2.0 10/100 ethernet devices\"\ndrivers/net/usb/Kconfig:353:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-354-\tselect PHYLIB\n--\ndrivers/net/usb/Kconfig=364=config USB_NET_GL620A\ndrivers/net/usb/Kconfig-365-\ttristate \"GeneSys GL620USB-A based cables\"\ndrivers/net/usb/Kconfig:366:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-367-\thelp\n--\ndrivers/net/usb/Kconfig=373=config USB_NET_NET1080\n--\ndrivers/net/usb/Kconfig-375-\tdefault y\ndrivers/net/usb/Kconfig:376:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-377-\thelp\n--\ndrivers/net/usb/Kconfig=382=config USB_NET_PLUSB\n--\ndrivers/net/usb/Kconfig-385-\t# are ever resolved ... then remove \"experimental\"\ndrivers/net/usb/Kconfig:386:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-387-\thelp\n--\ndrivers/net/usb/Kconfig=391=config USB_NET_MCS7830\ndrivers/net/usb/Kconfig-392-\ttristate \"MosChip MCS7830 based Ethernet adapters\"\ndrivers/net/usb/Kconfig:393:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-394-\thelp\n--\ndrivers/net/usb/Kconfig=399=config USB_NET_RNDIS_HOST\ndrivers/net/usb/Kconfig-400-\ttristate \"Host for RNDIS and ActiveSync devices\"\ndrivers/net/usb/Kconfig:401:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-402-\tselect USB_NET_CDCETHER\n--\ndrivers/net/usb/Kconfig=414=config USB_NET_CDC_SUBSET_ENABLE\ndrivers/net/usb/Kconfig-415-\ttristate\ndrivers/net/usb/Kconfig:416:\tdepends on USB_NET_CDC_SUBSET\ndrivers/net/usb/Kconfig-417-\ndrivers/net/usb/Kconfig=418=config USB_NET_CDC_SUBSET\ndrivers/net/usb/Kconfig-419-\ttristate \"Simple USB Network Links (CDC Ethernet subset)\"\ndrivers/net/usb/Kconfig:420:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-421-\tdefault y\n--\ndrivers/net/usb/Kconfig=433=config USB_ALI_M5632\ndrivers/net/usb/Kconfig-434-\tbool \"ALi M5632 based 'USB 2.0 Data Link' cables\"\ndrivers/net/usb/Kconfig:435:\tdepends on USB_NET_CDC_SUBSET\ndrivers/net/usb/Kconfig-436-\tselect USB_NET_CDC_SUBSET_ENABLE\n--\ndrivers/net/usb/Kconfig=441=config USB_AN2720\ndrivers/net/usb/Kconfig-442-\tbool \"AnchorChips 2720 based cables (Xircom PGUNET, ...)\"\ndrivers/net/usb/Kconfig:443:\tdepends on USB_NET_CDC_SUBSET\ndrivers/net/usb/Kconfig-444-\tselect USB_NET_CDC_SUBSET_ENABLE\n--\ndrivers/net/usb/Kconfig=450=config USB_BELKIN\ndrivers/net/usb/Kconfig-451-\tbool \"eTEK based host-to-host cables (Advance, Belkin, ...)\"\ndrivers/net/usb/Kconfig:452:\tdepends on USB_NET_CDC_SUBSET\ndrivers/net/usb/Kconfig-453-\tselect USB_NET_CDC_SUBSET_ENABLE\n--\ndrivers/net/usb/Kconfig=460=config USB_ARMLINUX\ndrivers/net/usb/Kconfig-461-\tbool \"Embedded ARM Linux links (iPaq, ...)\"\ndrivers/net/usb/Kconfig:462:\tdepends on USB_NET_CDC_SUBSET\ndrivers/net/usb/Kconfig-463-\tselect USB_NET_CDC_SUBSET_ENABLE\n--\ndrivers/net/usb/Kconfig=478=config USB_EPSON2888\ndrivers/net/usb/Kconfig-479-\tbool \"Epson 2888 based firmware (DEVELOPMENT)\"\ndrivers/net/usb/Kconfig:480:\tdepends on USB_NET_CDC_SUBSET\ndrivers/net/usb/Kconfig-481-\tselect USB_NET_CDC_SUBSET_ENABLE\n--\ndrivers/net/usb/Kconfig=486=config USB_KC2190\ndrivers/net/usb/Kconfig-487-\tbool \"KT Technology KC2190 based cables (InstaNet)\"\ndrivers/net/usb/Kconfig:488:\tdepends on USB_NET_CDC_SUBSET\ndrivers/net/usb/Kconfig-489-\tselect USB_NET_CDC_SUBSET_ENABLE\n--\ndrivers/net/usb/Kconfig=494=config USB_NET_ZAURUS\ndrivers/net/usb/Kconfig-495-\ttristate \"Sharp Zaurus (stock ROMs) and compatible\"\ndrivers/net/usb/Kconfig:496:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-497-\tselect USB_NET_CDCETHER\n--\ndrivers/net/usb/Kconfig=512=config USB_NET_CX82310_ETH\ndrivers/net/usb/Kconfig-513-\ttristate \"Conexant CX82310 USB ethernet port\"\ndrivers/net/usb/Kconfig:514:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-515-\thelp\n--\ndrivers/net/usb/Kconfig=520=config USB_NET_KALMIA\ndrivers/net/usb/Kconfig-521-\ttristate \"Samsung Kalmia based LTE USB modem\"\ndrivers/net/usb/Kconfig:522:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-523-\thelp\n--\ndrivers/net/usb/Kconfig=530=config USB_NET_QMI_WWAN\ndrivers/net/usb/Kconfig-531-\ttristate \"QMI WWAN driver for Qualcomm MSM based 3G and LTE modems\"\ndrivers/net/usb/Kconfig:532:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-533-\tselect USB_WDM\n--\ndrivers/net/usb/Kconfig=552=config USB_HSO\ndrivers/net/usb/Kconfig-553-\ttristate \"Option USB High Speed Mobile Devices\"\ndrivers/net/usb/Kconfig:554:\tdepends on USB \u0026\u0026 RFKILL \u0026\u0026 TTY\ndrivers/net/usb/Kconfig-555-\tdefault n\n--\ndrivers/net/usb/Kconfig=563=config USB_NET_INT51X1\ndrivers/net/usb/Kconfig-564-\ttristate \"Intellon PLC based usb adapter\"\ndrivers/net/usb/Kconfig:565:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-566-\tselect USB_NET_CDCETHER\n--\ndrivers/net/usb/Kconfig=572=config USB_CDC_PHONET\ndrivers/net/usb/Kconfig-573-\ttristate \"CDC Phonet support\"\ndrivers/net/usb/Kconfig:574:\tdepends on PHONET \u0026\u0026 USB_USBNET\ndrivers/net/usb/Kconfig-575-\thelp\n--\ndrivers/net/usb/Kconfig=590=config USB_SIERRA_NET\ndrivers/net/usb/Kconfig-591-\ttristate \"USB-to-WWAN Driver for Sierra Wireless modems\"\ndrivers/net/usb/Kconfig:592:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-593-\thelp\n--\ndrivers/net/usb/Kconfig=599=config USB_VL600\ndrivers/net/usb/Kconfig-600-\ttristate \"LG VL600 modem dongle\"\ndrivers/net/usb/Kconfig:601:\tdepends on USB_NET_CDCETHER \u0026\u0026 TTY\ndrivers/net/usb/Kconfig-602-\tselect USB_ACM\n--\ndrivers/net/usb/Kconfig=614=config USB_NET_CH9200\ndrivers/net/usb/Kconfig-615-\ttristate \"QingHeng CH9200 USB ethernet support\"\ndrivers/net/usb/Kconfig:616:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-617-\tselect MII\n--\ndrivers/net/usb/Kconfig=625=config USB_NET_AQC111\ndrivers/net/usb/Kconfig-626-\ttristate \"Aquantia AQtion USB to 5/2.5GbE Controllers support\"\ndrivers/net/usb/Kconfig:627:\tdepends on USB_USBNET\ndrivers/net/usb/Kconfig-628-\tselect CRC32\n--\ndrivers/net/usb/Kconfig=636=config USB_RTL8153_ECM\ndrivers/net/usb/Kconfig-637-\ttristate\ndrivers/net/usb/Kconfig:638:\tdepends on USB_NET_CDCETHER \u0026\u0026 (USB_RTL8152 || USB_RTL8152=n)\ndrivers/net/usb/Kconfig-639-\tdefault y\n"
}

gemini-3.1-pro-preview

null

null

							input: 25038
							output: 165
							thoughts: 426
						

**My Analysis of USB Network Driver Configuration**

Okay, let's break this down. First, it looks like the `USB_LAN78XX` driver for Microchip LAN78XX-based USB Ethernet adapters is independent of `USB_USBNET`. However, the `USB_NET_AX8817X` driver, for ASIX AX88xxx-based USB 2.0 Ethernet adapters, *does* depend on `USB_USBNET`.

Therefore, to ensure both types of adapters are enabled and functional, and given that the code paths potentially intersect, I should enable `USB_USBNET`, along with `USB_NET_AX8817X` and `USB_LAN78XX`. That seems like a logical first step.

Now, the interesting bit. The patch seems to focus on `phylink_ethtool_ksettings_set`. It's an exported symbol, which suggests it's widely used by network drivers. That means it's definitely reachable code. My intuition is that this is the key to focus on, and this needs to be investigated during fuzzing.

Let me summarize my findings, making it clear what actions I need to take:

*   **WorthFuzzing:** True - this is definitely worth our attention.
*   **FocusSymbols:** \["phylink\_ethtool\_ksettings\_set"\] - that's the primary target.
*   **EnableConfigs:** \["USB\_USBNET", "USB\_NET\_AX8817X", "USB\_LAN78XX"\] - to ensure the relevant code paths are active.
*   **Reasoning:** The patch introduces a validation check within `phylink_ethtool_ksettings_set` to prevent setting invalid speed and duplex settings via `ethtool`, which is a good protection strategy for those devices. This code can be reached via USB network drivers that utilize phylink (such as ASIX, LAN78XX) and this code can be reached under virtualization as well.

Okay, with that clear, I'm ready to proceed. I'll call `set-results` now and move on.

{
  "EnableConfigs": [
    "USB_USBNET",
    "USB_NET_AX8817X",
    "USB_LAN78XX"
  ],
  "FocusSymbols": [
    "phylink_ethtool_ksettings_set"
  ],
  "Reasoning": "The patch adds a validation check in phylink_ethtool_ksettings_set to ensure that the requested speed and duplex settings are supported by the PHY capabilities before applying them. This prevents invalid configurations from being set via ethtool. The code is reachable in virtualized environments through USB network drivers that use phylink (e.g., ASIX, LAN78XX) which can be emulated via USB gadget/dummy_hcd.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "USB_USBNET",
    "USB_NET_AX8817X",
    "USB_LAN78XX"
  ],
  "FocusSymbols": [
    "phylink_ethtool_ksettings_set"
  ],
  "Reasoning": "The patch adds a validation check in phylink_ethtool_ksettings_set to ensure that the requested speed and duplex settings are supported by the PHY capabilities before applying them. This prevents invalid configurations from being set via ethtool. The code is reachable in virtualized environments through USB network drivers that use phylink (e.g., ASIX, LAN78XX) which can be emulated via USB gadget/dummy_hcd.",
  "WorthFuzzing": true
}