AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mellanox mlx5 driver to use an embedded buffer for FEC histogram ranges instead of dynamically allocating it. Since mlx5 is a physical hardware driver and is not emulated in virtualized environments like QEMU or GCE, these code paths are unreachable during fuzzing. The change to `struct ethtool_fec_hist` only increases its size slightly and does not introduce new reachable logic for other drivers.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit 10e2d2048587fa6ee59d198ecfaac565239323dc\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Fri Jul 24 08:19:41 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h\nindex d507289096c206..6867a5aed42c08 100644\n--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h\n+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h\n@@ -984,7 +984,6 @@ struct mlx5e_priv {\n \tstruct mlx5e_mqprio_rl    *mqprio_rl;\n \tstruct dentry             *dfs_root;\n \tstruct mlx5_devcom_comp_dev *devcom;\n-\tstruct ethtool_fec_hist_range *fec_ranges;\n };\n \n static inline u16 mlx5e_stats_nch_read(const struct mlx5e_priv *priv)\ndiff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c\nindex c1acb9012d3f9e..7d47a1da8b6b64 100644\n--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c\n+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c\n@@ -6415,14 +6415,8 @@ int mlx5e_priv_init(struct mlx5e_priv *priv,\n \tif (!priv-\u003echannel_stats)\n \t\tgoto err_free_tx_rates;\n \n-\tpriv-\u003efec_ranges = kzalloc_objs(*priv-\u003efec_ranges, ETHTOOL_FEC_HIST_MAX);\n-\tif (!priv-\u003efec_ranges)\n-\t\tgoto err_free_channel_stats;\n-\n \treturn 0;\n \n-err_free_channel_stats:\n-\tkfree(priv-\u003echannel_stats);\n err_free_tx_rates:\n \tkfree(priv-\u003etx_rates);\n err_free_txq2sq_stats:\n@@ -6447,7 +6441,6 @@ void mlx5e_priv_cleanup(struct mlx5e_priv *priv)\n \tif (!priv-\u003emdev)\n \t\treturn;\n \n-\tkfree(priv-\u003efec_ranges);\n \tfor (i = 0; i \u003c priv-\u003estats_nch; i++)\n \t\tkvfree(priv-\u003echannel_stats[i]);\n \tkfree(priv-\u003echannel_stats);\ndiff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c\nindex de38b60806c264..e7e6db7f6bf175 100644\n--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c\n+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c\n@@ -1550,7 +1550,7 @@ static bool fec_rs_validate_hist_type(int mode, int hist_type)\n \n static u8\n fec_rs_histogram_fill_ranges(struct mlx5e_priv *priv, int mode,\n-\t\t\t     const struct ethtool_fec_hist_range **ranges)\n+\t\t\t     struct ethtool_fec_hist_range *ranges)\n {\n \tstruct mlx5_core_dev *mdev = priv-\u003emdev;\n \tu32 out[MLX5_ST_SZ_DW(pphcr_reg)] = {0};\n@@ -1558,8 +1558,6 @@ fec_rs_histogram_fill_ranges(struct mlx5e_priv *priv, int mode,\n \tint sz = MLX5_ST_SZ_BYTES(pphcr_reg);\n \tu8 hist_type, num_of_bins;\n \n-\tmemset(priv-\u003efec_ranges, 0,\n-\t       ETHTOOL_FEC_HIST_MAX * sizeof(*priv-\u003efec_ranges));\n \tMLX5_SET(pphcr_reg, in, local_port, 1);\n \tif (mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPHCR, 0, 0))\n \t\treturn 0;\n@@ -1575,12 +1573,11 @@ fec_rs_histogram_fill_ranges(struct mlx5e_priv *priv, int mode,\n \tfor (int i = 0; i \u003c num_of_bins; i++) {\n \t\tvoid *bin_range = MLX5_ADDR_OF(pphcr_reg, out, bin_range[i]);\n \n-\t\tpriv-\u003efec_ranges[i].high = MLX5_GET(bin_range_layout, bin_range,\n-\t\t\t\t\t\t    high_val);\n-\t\tpriv-\u003efec_ranges[i].low = MLX5_GET(bin_range_layout, bin_range,\n-\t\t\t\t\t\t   low_val);\n+\t\tranges[i].high = MLX5_GET(bin_range_layout, bin_range,\n+\t\t\t\t\t  high_val);\n+\t\tranges[i].low = MLX5_GET(bin_range_layout, bin_range,\n+\t\t\t\t\t low_val);\n \t}\n-\t*ranges = priv-\u003efec_ranges;\n \n \treturn num_of_bins;\n }\n@@ -1622,10 +1619,12 @@ static void fec_set_histograms_stats(struct mlx5e_priv *priv, int mode,\n \tcase MLX5E_FEC_LLRS_272_257_1:\n \tcase MLX5E_FEC_RS_544_514_INTERLEAVED_QUAD:\n \t\tnum_of_bins =\n-\t\t\tfec_rs_histogram_fill_ranges(priv, mode, \u0026hist-\u003eranges);\n-\t\tif (num_of_bins)\n+\t\t\tfec_rs_histogram_fill_ranges(priv, mode, hist-\u003eranges_buf);\n+\t\tif (num_of_bins) {\n+\t\t\thist-\u003eranges = hist-\u003eranges_buf;\n \t\t\treturn fec_rs_histogram_fill_stats(priv, num_of_bins,\n \t\t\t\t\t\t\t   hist);\n+\t\t}\n \t\tbreak;\n \tdefault:\n \t\treturn;\ndiff --git a/include/linux/ethtool.h b/include/linux/ethtool.h\nindex 5d491a98265ef9..12683b5d125e41 100644\n--- a/include/linux/ethtool.h\n+++ b/include/linux/ethtool.h\n@@ -562,6 +562,7 @@ struct ethtool_fec_hist {\n \t\tu64 per_lane[ETHTOOL_MAX_LANES];\n \t} values[ETHTOOL_FEC_HIST_MAX];\n \tconst struct ethtool_fec_hist_range *ranges;\n+\tstruct ethtool_fec_hist_range ranges_buf[ETHTOOL_FEC_HIST_MAX];\n };\n /**\n  * struct ethtool_fec_stats - statistics for IEEE 802.3 FEC\n"
}

best-expensive

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mellanox mlx5 driver to use an embedded buffer for FEC histogram ranges instead of dynamically allocating it. Since mlx5 is a physical hardware driver and is not emulated in virtualized environments like QEMU or GCE, these code paths are unreachable during fuzzing. The change to `struct ethtool_fec_hist` only increases its size slightly and does not introduce new reachable logic for other drivers.",
  "WorthFuzzing": false
}

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 10e2d2048587fa6ee59d198ecfaac565239323dc
Author: syz-cluster <triage@syzkaller.com>
Date:   Fri Jul 24 08:19:41 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index d507289096c206..6867a5aed42c08 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -984,7 +984,6 @@ struct mlx5e_priv {
 	struct mlx5e_mqprio_rl    *mqprio_rl;
 	struct dentry             *dfs_root;
 	struct mlx5_devcom_comp_dev *devcom;
-	struct ethtool_fec_hist_range *fec_ranges;
 };
 
 static inline u16 mlx5e_stats_nch_read(const struct mlx5e_priv *priv)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index c1acb9012d3f9e..7d47a1da8b6b64 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -6415,14 +6415,8 @@ int mlx5e_priv_init(struct mlx5e_priv *priv,
 	if (!priv->channel_stats)
 		goto err_free_tx_rates;
 
-	priv->fec_ranges = kzalloc_objs(*priv->fec_ranges, ETHTOOL_FEC_HIST_MAX);
-	if (!priv->fec_ranges)
-		goto err_free_channel_stats;
-
 	return 0;
 
-err_free_channel_stats:
-	kfree(priv->channel_stats);
 err_free_tx_rates:
 	kfree(priv->tx_rates);
 err_free_txq2sq_stats:
@@ -6447,7 +6441,6 @@ void mlx5e_priv_cleanup(struct mlx5e_priv *priv)
 	if (!priv->mdev)
 		return;
 
-	kfree(priv->fec_ranges);
 	for (i = 0; i < priv->stats_nch; i++)
 		kvfree(priv->channel_stats[i]);
 	kfree(priv->channel_stats);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
index de38b60806c264..e7e6db7f6bf175 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
@@ -1550,7 +1550,7 @@ static bool fec_rs_validate_hist_type(int mode, int hist_type)
 
 static u8
 fec_rs_histogram_fill_ranges(struct mlx5e_priv *priv, int mode,
-			     const struct ethtool_fec_hist_range **ranges)
+			     struct ethtool_fec_hist_range *ranges)
 {
 	struct mlx5_core_dev *mdev = priv->mdev;
 	u32 out[MLX5_ST_SZ_DW(pphcr_reg)] = {0};
@@ -1558,8 +1558,6 @@ fec_rs_histogram_fill_ranges(struct mlx5e_priv *priv, int mode,
 	int sz = MLX5_ST_SZ_BYTES(pphcr_reg);
 	u8 hist_type, num_of_bins;
 
-	memset(priv->fec_ranges, 0,
-	       ETHTOOL_FEC_HIST_MAX * sizeof(*priv->fec_ranges));
 	MLX5_SET(pphcr_reg, in, local_port, 1);
 	if (mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPHCR, 0, 0))
 		return 0;
@@ -1575,12 +1573,11 @@ fec_rs_histogram_fill_ranges(struct mlx5e_priv *priv, int mode,
 	for (int i = 0; i < num_of_bins; i++) {
 		void *bin_range = MLX5_ADDR_OF(pphcr_reg, out, bin_range[i]);
 
-		priv->fec_ranges[i].high = MLX5_GET(bin_range_layout, bin_range,
-						    high_val);
-		priv->fec_ranges[i].low = MLX5_GET(bin_range_layout, bin_range,
-						   low_val);
+		ranges[i].high = MLX5_GET(bin_range_layout, bin_range,
+					  high_val);
+		ranges[i].low = MLX5_GET(bin_range_layout, bin_range,
+					 low_val);
 	}
-	*ranges = priv->fec_ranges;
 
 	return num_of_bins;
 }
@@ -1622,10 +1619,12 @@ static void fec_set_histograms_stats(struct mlx5e_priv *priv, int mode,
 	case MLX5E_FEC_LLRS_272_257_1:
 	case MLX5E_FEC_RS_544_514_INTERLEAVED_QUAD:
 		num_of_bins =
-			fec_rs_histogram_fill_ranges(priv, mode, &hist->ranges);
-		if (num_of_bins)
+			fec_rs_histogram_fill_ranges(priv, mode, hist->ranges_buf);
+		if (num_of_bins) {
+			hist->ranges = hist->ranges_buf;
 			return fec_rs_histogram_fill_stats(priv, num_of_bins,
 							   hist);
+		}
 		break;
 	default:
 		return;
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 5d491a98265ef9..12683b5d125e41 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -562,6 +562,7 @@ struct ethtool_fec_hist {
 		u64 per_lane[ETHTOOL_MAX_LANES];
 	} values[ETHTOOL_FEC_HIST_MAX];
 	const struct ethtool_fec_hist_range *ranges;
+	struct ethtool_fec_hist_range ranges_buf[ETHTOOL_FEC_HIST_MAX];
 };
 /**
  * struct ethtool_fec_stats - statistics for IEEE 802.3 FEC

gemini-3.1-pro-preview

null

null

							input: 3581
							output: 21
							thoughts: 625
						

**Analyzing the Reachability of a Mellanox mlx5 Driver Patch**

Okay, so I've got this patch that tweaks the Mellanox mlx5 driver and ethtool. It's essentially moving the `fec_ranges` allocation from `mlx5e_priv` to an embedded buffer within `struct ethtool_fec_hist`, which is pretty straightforward. My first thought is: does this work and, more importantly, can we even *test* it in our environment?

We’re modifying `fec_rs_histogram_fill_ranges` to write directly to the new buffer (`ranges_buf`) and updating `fec_set_histograms_stats` accordingly. Functionally, it seems sound. The immediate question is always reachability. This is a *hardware* driver, so that raises an immediate red flag. Can we emulate mlx5 in our current fuzzing setup? I think ethtool statistics are accessed through netlink or ioctl, right? But the driver still needs to be loaded and a netdev registered.

Let me think, does syzkaller have support for mlx5? No, it's not the default QEMU/GCE setup. Okay, syzkaller doesn't emulate the hardware. The critical question becomes: can we reach this code without actual hardware? Specifically, where is `mlx5e_priv_init` called? During driver initialization, right? If there's no hardware, the driver won't probe, and `mlx5e_priv_init` won't be called. So, can we probe mlx5 via some software mechanism?

I need to quickly search syzkaller for `mlx5` or check if it's fuzzable. Wait, the prompt itself seems to have already answered this... it says that code paths unreachable in virtual environments like GCE or QEMU, even with software emulation like usb gadget or mac80211_hwsim, are what we're looking at. Ml5 is a PCIe device, so that's a no-go. QEMU doesn't emulate mlx5. I need to make sure though. Let's look up QEMU's supported devices. I remember e1000, rtl8139, virtio-net, vmxnet3, igb... none of which are mlx5.

Wait, I think there is a vDPA mlx5 driver, but that still likely needs hardware. Okay, the question comes back to whether there is any way to reach `mlx5e_priv_init`. Let me pull up `grepper` and see where this function is even called. Hopefully, that will give me some insight.

{
  "Expression": "mlx5e_priv_init"
}

{
  "Output": "drivers/net/ethernet/mellanox/mlx5/core/en.h=1275=int mlx5e_get_pf_num_tirs(struct mlx5_core_dev *mdev);\ndrivers/net/ethernet/mellanox/mlx5/core/en.h:1276:int mlx5e_priv_init(struct mlx5e_priv *priv,\ndrivers/net/ethernet/mellanox/mlx5/core/en.h-1277-\t\t    const struct mlx5e_profile *profile,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c=6353=void mlx5e_set_rx_mode_work(struct work_struct *work)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6364-/* mlx5e generic netdev management API (move to en_common.c) */\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c:6365:int mlx5e_priv_init(struct mlx5e_priv *priv,\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6366-\t\t    const struct mlx5e_profile *profile,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c=6493=mlx5e_create_netdev(struct mlx5_core_dev *mdev, const struct mlx5e_profile *profile)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6507-\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c:6508:\terr = mlx5e_priv_init(netdev_priv(netdev), profile, netdev, mdev);\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6509-\tif (err) {\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c:6510:\t\tmlx5_core_err(mdev, \"mlx5e_priv_init failed, err=%d\\n\", err);\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6511-\t\tgoto err_free_netdev;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c=6654=mlx5e_netdev_init_profile(struct net_device *netdev, struct mlx5_core_dev *mdev,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6659-\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c:6660:\terr = mlx5e_priv_init(priv, new_profile, netdev, mdev);\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6661-\tif (err) {\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c:6662:\t\tmlx5_core_err(mdev, \"mlx5e_priv_init failed, err=%d\\n\", err);\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6663-\t\treturn err;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c=773=static int mlx5_rdma_setup_rn(struct ib_device *ibdev, u32 port_num,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c-799-\ndrivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c:800:\terr = mlx5e_priv_init(epriv, prof, netdev, mdev);\ndrivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c-801-\tif (err)\n"
}

gemini-3.1-pro-preview

null

null

							input: 5866
							output: 20
							thoughts: 89
						

**Investigating the mlx5 Driver Initialization**

Okay, so the `mlx5` driver is being a bit of a stickler. It seems I need actual, physical Mellanox hardware – ConnectX-4, 5, 6, or 7, presumably, or something equivalent – to even get this thing off the ground. No hardware, no initialization. This means `mlx5e_priv_init` isn't going to get called. That's a problem when I'm trying to test or develop without direct access to the hardware!

Hmm, is there *any* software emulation of mlx5 baked into the kernel? I seem to recall something about that, though I can't place it. Maybe a virtual device or a module to simulate the hardware? It's worth digging into.

Alright, let's see if there are any mock drivers or test implementations that might simulate the mlx5 functionality. If there's some kind of test framework, that would be ideal. I need a way to progress my work without being completely blocked. Finding a suitable software-based alternative will make life a lot easier, for sure.

{
  "Expression": "mlx5_core_dev"
}

{
  "Output": "\nFull output is too long, showing 500 out of 13966 lines.\nUse more precise expression if possible.\n\ndrivers/fwctl/mlx5/main.c=24=struct mlx5ctl_dev {\ndrivers/fwctl/mlx5/main.c-25-\tstruct fwctl_device fwctl;\ndrivers/fwctl/mlx5/main.c:26:\tstruct mlx5_core_dev *mdev;\ndrivers/fwctl/mlx5/main.c-27-};\n--\ndrivers/fwctl/mlx5/main.c=116=static void mlx5ctl_release_uid(struct mlx5ctl_dev *mcdev, u16 uid)\n--\ndrivers/fwctl/mlx5/main.c-118-\tu32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {};\ndrivers/fwctl/mlx5/main.c:119:\tstruct mlx5_core_dev *mdev = mcdev-\u003emdev;\ndrivers/fwctl/mlx5/main.c-120-\tint ret;\n--\ndrivers/fwctl/mlx5/main.c=370=static int mlx5ctl_probe(struct auxiliary_device *adev,\n--\ndrivers/fwctl/mlx5/main.c-374-\tstruct mlx5_adev *madev = container_of(adev, struct mlx5_adev, adev);\ndrivers/fwctl/mlx5/main.c:375:\tstruct mlx5_core_dev *mdev = madev-\u003emdev;\ndrivers/fwctl/mlx5/main.c-376-\tstruct mlx5ctl_dev *mcdev __free(mlx5ctl) = fwctl_alloc_device(\n--\ndrivers/infiniband/hw/mlx5/cmd.c=8=int mlx5r_cmd_query_special_mkeys(struct mlx5_ib_dev *dev)\n--\ndrivers/infiniband/hw/mlx5/cmd.c-44-\ndrivers/infiniband/hw/mlx5/cmd.c:45:int mlx5_cmd_query_cong_params(struct mlx5_core_dev *dev, int cong_point,\ndrivers/infiniband/hw/mlx5/cmd.c-46-\t\t\t       void *out)\n--\ndrivers/infiniband/hw/mlx5/cmd.c-56-\ndrivers/infiniband/hw/mlx5/cmd.c:57:void mlx5_cmd_destroy_tir(struct mlx5_core_dev *dev, u32 tirn, u16 uid)\ndrivers/infiniband/hw/mlx5/cmd.c-58-{\n--\ndrivers/infiniband/hw/mlx5/cmd.c-66-\ndrivers/infiniband/hw/mlx5/cmd.c:67:void mlx5_cmd_destroy_tis(struct mlx5_core_dev *dev, u32 tisn, u16 uid)\ndrivers/infiniband/hw/mlx5/cmd.c-68-{\n--\ndrivers/infiniband/hw/mlx5/cmd.c-76-\ndrivers/infiniband/hw/mlx5/cmd.c:77:int mlx5_cmd_destroy_rqt(struct mlx5_core_dev *dev, u32 rqtn, u16 uid)\ndrivers/infiniband/hw/mlx5/cmd.c-78-{\n--\ndrivers/infiniband/hw/mlx5/cmd.c-86-\ndrivers/infiniband/hw/mlx5/cmd.c:87:int mlx5_cmd_alloc_transport_domain(struct mlx5_core_dev *dev, u32 *tdn,\ndrivers/infiniband/hw/mlx5/cmd.c-88-\t\t\t\t    u16 uid)\n--\ndrivers/infiniband/hw/mlx5/cmd.c-105-\ndrivers/infiniband/hw/mlx5/cmd.c:106:void mlx5_cmd_dealloc_transport_domain(struct mlx5_core_dev *dev, u32 tdn,\ndrivers/infiniband/hw/mlx5/cmd.c-107-\t\t\t\t       u16 uid)\n--\ndrivers/infiniband/hw/mlx5/cmd.c-117-\ndrivers/infiniband/hw/mlx5/cmd.c:118:int mlx5_cmd_dealloc_pd(struct mlx5_core_dev *dev, u32 pdn, u16 uid)\ndrivers/infiniband/hw/mlx5/cmd.c-119-{\n--\ndrivers/infiniband/hw/mlx5/cmd.c-127-\ndrivers/infiniband/hw/mlx5/cmd.c:128:int mlx5_cmd_attach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,\ndrivers/infiniband/hw/mlx5/cmd.c-129-\t\t\tu32 qpn, u16 uid)\n--\ndrivers/infiniband/hw/mlx5/cmd.c-141-\ndrivers/infiniband/hw/mlx5/cmd.c:142:int mlx5_cmd_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,\ndrivers/infiniband/hw/mlx5/cmd.c-143-\t\t\tu32 qpn, u16 uid)\n--\ndrivers/infiniband/hw/mlx5/cmd.c-155-\ndrivers/infiniband/hw/mlx5/cmd.c:156:int mlx5_cmd_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn, u16 uid)\ndrivers/infiniband/hw/mlx5/cmd.c-157-{\n--\ndrivers/infiniband/hw/mlx5/cmd.c-169-\ndrivers/infiniband/hw/mlx5/cmd.c:170:int mlx5_cmd_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn, u16 uid)\ndrivers/infiniband/hw/mlx5/cmd.c-171-{\n--\ndrivers/infiniband/hw/mlx5/cmd.c=180=int mlx5_cmd_mad_ifc(struct mlx5_ib_dev *dev, const void *inb, void *outb,\n--\ndrivers/infiniband/hw/mlx5/cmd.c-222-\ndrivers/infiniband/hw/mlx5/cmd.c:223:int mlx5_cmd_uar_alloc(struct mlx5_core_dev *dev, u32 *uarn, u16 uid)\ndrivers/infiniband/hw/mlx5/cmd.c-224-{\n--\ndrivers/infiniband/hw/mlx5/cmd.c-238-\ndrivers/infiniband/hw/mlx5/cmd.c:239:int mlx5_cmd_uar_dealloc(struct mlx5_core_dev *dev, u32 uarn, u16 uid)\ndrivers/infiniband/hw/mlx5/cmd.c-240-{\n--\ndrivers/infiniband/hw/mlx5/cmd.c-248-\ndrivers/infiniband/hw/mlx5/cmd.c:249:int mlx5_cmd_query_vuid(struct mlx5_core_dev *dev, bool data_direct,\ndrivers/infiniband/hw/mlx5/cmd.c-250-\t\t\tchar *out_vuid)\n--\ndrivers/infiniband/hw/mlx5/cmd.h=40=int mlx5r_cmd_query_special_mkeys(struct mlx5_ib_dev *dev);\ndrivers/infiniband/hw/mlx5/cmd.h:41:int mlx5_cmd_query_cong_params(struct mlx5_core_dev *dev, int cong_point,\ndrivers/infiniband/hw/mlx5/cmd.h-42-\t\t\t       void *out);\ndrivers/infiniband/hw/mlx5/cmd.h:43:int mlx5_cmd_dealloc_pd(struct mlx5_core_dev *dev, u32 pdn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:44:void mlx5_cmd_destroy_tir(struct mlx5_core_dev *dev, u32 tirn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:45:void mlx5_cmd_destroy_tis(struct mlx5_core_dev *dev, u32 tisn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:46:int mlx5_cmd_destroy_rqt(struct mlx5_core_dev *dev, u32 rqtn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:47:int mlx5_cmd_alloc_transport_domain(struct mlx5_core_dev *dev, u32 *tdn,\ndrivers/infiniband/hw/mlx5/cmd.h-48-\t\t\t\t    u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:49:void mlx5_cmd_dealloc_transport_domain(struct mlx5_core_dev *dev, u32 tdn,\ndrivers/infiniband/hw/mlx5/cmd.h-50-\t\t\t\t       u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:51:int mlx5_cmd_attach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,\ndrivers/infiniband/hw/mlx5/cmd.h-52-\t\t\tu32 qpn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:53:int mlx5_cmd_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,\ndrivers/infiniband/hw/mlx5/cmd.h-54-\t\t\tu32 qpn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:55:int mlx5_cmd_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:56:int mlx5_cmd_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h-57-int mlx5_cmd_mad_ifc(struct mlx5_ib_dev *dev, const void *inb, void *outb,\ndrivers/infiniband/hw/mlx5/cmd.h-58-\t\t     u16 opmod, u8 port);\ndrivers/infiniband/hw/mlx5/cmd.h:59:int mlx5_cmd_uar_alloc(struct mlx5_core_dev *dev, u32 *uarn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:60:int mlx5_cmd_uar_dealloc(struct mlx5_core_dev *dev, u32 uarn, u16 uid);\ndrivers/infiniband/hw/mlx5/cmd.h:61:int mlx5_cmd_query_vuid(struct mlx5_core_dev *dev, bool data_direct,\ndrivers/infiniband/hw/mlx5/cmd.h-62-\t\t\tchar *out_vuid);\n--\ndrivers/infiniband/hw/mlx5/cong.c=292=static int mlx5_ib_get_cc_params(struct mlx5_ib_dev *dev, u32 port_num,\n--\ndrivers/infiniband/hw/mlx5/cong.c-299-\tenum mlx5_ib_cong_node_type node;\ndrivers/infiniband/hw/mlx5/cong.c:300:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/cong.c-301-\n--\ndrivers/infiniband/hw/mlx5/cong.c=329=static int mlx5_ib_set_cc_params(struct mlx5_ib_dev *dev, u32 port_num,\n--\ndrivers/infiniband/hw/mlx5/cong.c-335-\tenum mlx5_ib_cong_node_type node;\ndrivers/infiniband/hw/mlx5/cong.c:336:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/cong.c-337-\tu32 attr_mask = 0;\n--\ndrivers/infiniband/hw/mlx5/cong.c=434=void mlx5_ib_init_cong_debugfs(struct mlx5_ib_dev *dev, u32 port_num)\n--\ndrivers/infiniband/hw/mlx5/cong.c-436-\tstruct mlx5_ib_dbg_cc_params *dbg_cc_params;\ndrivers/infiniband/hw/mlx5/cong.c:437:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/cong.c-438-\tint i;\n--\ndrivers/infiniband/hw/mlx5/counters.c=288=mlx5_ib_alloc_hw_port_stats(struct ib_device *ibdev, u32 port_num)\n--\ndrivers/infiniband/hw/mlx5/counters.c-295-\ndrivers/infiniband/hw/mlx5/counters.c:296:static int mlx5_ib_query_q_counters(struct mlx5_core_dev *mdev,\ndrivers/infiniband/hw/mlx5/counters.c-297-\t\t\t\t    const struct mlx5_ib_counters *cnts,\n--\ndrivers/infiniband/hw/mlx5/counters.c=350=static int mlx5_ib_query_q_counters_vport(struct mlx5_ib_dev *dev,\n--\ndrivers/infiniband/hw/mlx5/counters.c-357-\tu32 in[MLX5_ST_SZ_DW(query_q_counter_in)] = {};\ndrivers/infiniband/hw/mlx5/counters.c:358:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/counters.c-359-\t__be32 val;\n--\ndrivers/infiniband/hw/mlx5/counters.c=387=static int do_get_hw_stats(struct ib_device *ibdev,\n--\ndrivers/infiniband/hw/mlx5/counters.c-392-\tconst struct mlx5_ib_counters *cnts = get_counters(dev, port_num);\ndrivers/infiniband/hw/mlx5/counters.c:393:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/counters.c-394-\tint ret, num_counters;\n--\ndrivers/infiniband/hw/mlx5/cq.c=611=int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)\n--\ndrivers/infiniband/hw/mlx5/cq.c-615-\tstruct mlx5_ib_dev *dev = to_mdev(cq-\u003eibcq.device);\ndrivers/infiniband/hw/mlx5/cq.c:616:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/cq.c-617-\tunsigned long flags;\n--\ndrivers/infiniband/hw/mlx5/cq.c=648=int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)\ndrivers/infiniband/hw/mlx5/cq.c-649-{\ndrivers/infiniband/hw/mlx5/cq.c:650:\tstruct mlx5_core_dev *mdev = to_mdev(ibcq-\u003edevice)-\u003emdev;\ndrivers/infiniband/hw/mlx5/cq.c-651-\tstruct mlx5_ib_cq *cq = to_mcq(ibcq);\n--\ndrivers/infiniband/hw/mlx5/devx.c=107=struct devx_umem {\ndrivers/infiniband/hw/mlx5/devx.c:108:\tstruct mlx5_core_dev\t\t*mdev;\ndrivers/infiniband/hw/mlx5/devx.c-109-\tstruct ib_umem\t\t\t*umem;\n--\ndrivers/infiniband/hw/mlx5/devx.c=2005=static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,\n--\ndrivers/infiniband/hw/mlx5/devx.c-2023-#define MAX_SUPP_EVENT_NUM 255\ndrivers/infiniband/hw/mlx5/devx.c:2024:static bool is_valid_events(struct mlx5_core_dev *dev,\ndrivers/infiniband/hw/mlx5/devx.c-2025-\t\t\t    int num_events, u16 *event_type_num_list,\n--\ndrivers/infiniband/hw/mlx5/devx.c=2451=static int devx_umem_cleanup(struct ib_uobject *uobject,\n--\ndrivers/infiniband/hw/mlx5/devx.c-2467-\ndrivers/infiniband/hw/mlx5/devx.c:2468:static bool is_unaffiliated_event(struct mlx5_core_dev *dev,\ndrivers/infiniband/hw/mlx5/devx.c-2469-\t\t\t\t  unsigned long event_type)\n--\ndrivers/infiniband/hw/mlx5/dm.c=12=static int mlx5_cmd_alloc_memic(struct mlx5_dm *dm, phys_addr_t *addr,\n--\ndrivers/infiniband/hw/mlx5/dm.c-14-{\ndrivers/infiniband/hw/mlx5/dm.c:15:\tstruct mlx5_core_dev *dev = dm-\u003edev;\ndrivers/infiniband/hw/mlx5/dm.c-16-\tu64 num_memic_hw_pages = MLX5_CAP_DEV_MEM(dev, memic_bar_size)\n--\ndrivers/infiniband/hw/mlx5/dm.c=87=void mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, phys_addr_t addr,\n--\ndrivers/infiniband/hw/mlx5/dm.c-89-{\ndrivers/infiniband/hw/mlx5/dm.c:90:\tstruct mlx5_core_dev *dev = dm-\u003edev;\ndrivers/infiniband/hw/mlx5/dm.c-91-\tu64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);\n--\ndrivers/infiniband/hw/mlx5/dm.c=114=void mlx5_cmd_dealloc_memic_op(struct mlx5_dm *dm, phys_addr_t addr,\n--\ndrivers/infiniband/hw/mlx5/dm.c-117-\tu32 in[MLX5_ST_SZ_DW(modify_memic_in)] = {};\ndrivers/infiniband/hw/mlx5/dm.c:118:\tstruct mlx5_core_dev *dev = dm-\u003edev;\ndrivers/infiniband/hw/mlx5/dm.c-119-\n--\ndrivers/infiniband/hw/mlx5/dm.c=128=static int mlx5_cmd_alloc_memic_op(struct mlx5_dm *dm, phys_addr_t addr,\n--\ndrivers/infiniband/hw/mlx5/dm.c-132-\tu32 in[MLX5_ST_SZ_DW(modify_memic_in)] = {};\ndrivers/infiniband/hw/mlx5/dm.c:133:\tstruct mlx5_core_dev *dev = dm-\u003edev;\ndrivers/infiniband/hw/mlx5/dm.c-134-\tint err;\n--\ndrivers/infiniband/hw/mlx5/dm.c=352=static struct ib_dm *handle_alloc_dm_sw_icm(struct ib_ucontext *ctx,\n--\ndrivers/infiniband/hw/mlx5/dm.c-356-{\ndrivers/infiniband/hw/mlx5/dm.c:357:\tstruct mlx5_core_dev *dev = to_mdev(ctx-\u003edevice)-\u003emdev;\ndrivers/infiniband/hw/mlx5/dm.c-358-\tenum mlx5_sw_icm_type icm_type;\n--\ndrivers/infiniband/hw/mlx5/dm.c=470=static int mlx5_dm_icm_dealloc(struct mlx5_ib_ucontext *ctx,\n--\ndrivers/infiniband/hw/mlx5/dm.c-473-\tenum mlx5_sw_icm_type type = get_icm_type(dm-\u003ebase.type);\ndrivers/infiniband/hw/mlx5/dm.c:474:\tstruct mlx5_core_dev *dev = to_mdev(dm-\u003ebase.ibdm.device)-\u003emdev;\ndrivers/infiniband/hw/mlx5/dm.c-475-\tint err;\n--\ndrivers/infiniband/hw/mlx5/dmah.c=13=static int mlx5_ib_alloc_dmah(struct ib_dmah *ibdmah,\n--\ndrivers/infiniband/hw/mlx5/dmah.c-15-{\ndrivers/infiniband/hw/mlx5/dmah.c:16:\tstruct mlx5_core_dev *mdev = to_mdev(ibdmah-\u003edevice)-\u003emdev;\ndrivers/infiniband/hw/mlx5/dmah.c-17-\tstruct mlx5_ib_dmah *dmah = to_mdmah(ibdmah);\n--\ndrivers/infiniband/hw/mlx5/dmah.c=39=static int mlx5_ib_dealloc_dmah(struct ib_dmah *ibdmah,\n--\ndrivers/infiniband/hw/mlx5/dmah.c-42-\tstruct mlx5_ib_dmah *dmah = to_mdmah(ibdmah);\ndrivers/infiniband/hw/mlx5/dmah.c:43:\tstruct mlx5_core_dev *mdev = to_mdev(ibdmah-\u003edevice)-\u003emdev;\ndrivers/infiniband/hw/mlx5/dmah.c-44-\n--\ndrivers/infiniband/hw/mlx5/fs.c=149=int parse_flow_flow_action(struct mlx5_ib_flow_action *maction,\n--\ndrivers/infiniband/hw/mlx5/fs.c-188-\ndrivers/infiniband/hw/mlx5/fs.c:189:static int parse_flow_attr(struct mlx5_core_dev *mdev,\ndrivers/infiniband/hw/mlx5/fs.c-190-\t\t\t   struct mlx5_flow_spec *spec,\n--\ndrivers/infiniband/hw/mlx5/fs.c=547=static bool flow_is_multicast_only(const struct ib_flow_attr *ib_attr)\n--\ndrivers/infiniband/hw/mlx5/fs.c-576-\ndrivers/infiniband/hw/mlx5/fs.c:577:static bool is_valid_ethertype(struct mlx5_core_dev *mdev,\ndrivers/infiniband/hw/mlx5/fs.c-578-\t\t\t       const struct ib_flow_attr *flow_attr,\n--\ndrivers/infiniband/hw/mlx5/fs.c-625-\ndrivers/infiniband/hw/mlx5/fs.c:626:static bool is_valid_attr(struct mlx5_core_dev *mdev,\ndrivers/infiniband/hw/mlx5/fs.c-627-\t\t\t  const struct ib_flow_attr *flow_attr)\n--\ndrivers/infiniband/hw/mlx5/fs.c=1872=static int mlx5_ib_fill_transport_ns_info(struct mlx5_ib_dev *dev,\n--\ndrivers/infiniband/hw/mlx5/fs.c-1875-\t\t\t\t\t  u16 *vport,\ndrivers/infiniband/hw/mlx5/fs.c:1876:\t\t\t\t\t  struct mlx5_core_dev **ft_mdev,\ndrivers/infiniband/hw/mlx5/fs.c-1877-\t\t\t\t\t  u32 ib_port, u16 *esw_owner_vhca_id)\ndrivers/infiniband/hw/mlx5/fs.c-1878-{\ndrivers/infiniband/hw/mlx5/fs.c:1879:\tstruct mlx5_core_dev *esw_mdev;\ndrivers/infiniband/hw/mlx5/fs.c-1880-\n--\ndrivers/infiniband/hw/mlx5/fs.c=1908=_get_flow_table(struct mlx5_ib_dev *dev, u16 user_priority,\n--\ndrivers/infiniband/hw/mlx5/fs.c-1911-{\ndrivers/infiniband/hw/mlx5/fs.c:1912:\tstruct mlx5_core_dev *ft_mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/fs.c-1913-\tstruct mlx5_flow_table_attr ft_attr = {};\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c=11=static int\ndrivers/infiniband/hw/mlx5/ib_rep.c:12:mlx5_ib_set_vport_rep(struct mlx5_core_dev *dev,\ndrivers/infiniband/hw/mlx5/ib_rep.c:13:\t\t      struct mlx5_core_dev *rep_dev,\ndrivers/infiniband/hw/mlx5/ib_rep.c-14-\t\t      struct mlx5_eswitch_rep *rep,\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c-41-\ndrivers/infiniband/hw/mlx5/ib_rep.c:42:static void mlx5_ib_register_peer_vport_reps(struct mlx5_core_dev *mdev);\ndrivers/infiniband/hw/mlx5/ib_rep.c-43-\ndrivers/infiniband/hw/mlx5/ib_rep.c:44:static void mlx5_ib_num_ports_update(struct mlx5_core_dev *dev, u32 *num_ports)\ndrivers/infiniband/hw/mlx5/ib_rep.c-45-{\ndrivers/infiniband/hw/mlx5/ib_rep.c:46:\tstruct mlx5_core_dev *peer_dev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-47-\tint i;\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c-59-\ndrivers/infiniband/hw/mlx5/ib_rep.c:60:static int mlx5_ib_set_owner_transport(struct mlx5_core_dev *cur_owner,\ndrivers/infiniband/hw/mlx5/ib_rep.c:61:\t\t\t\t\tstruct mlx5_core_dev *new_owner)\ndrivers/infiniband/hw/mlx5/ib_rep.c-62-{\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c-88-\ndrivers/infiniband/hw/mlx5/ib_rep.c:89:static void mlx5_ib_release_transport(struct mlx5_core_dev *dev)\ndrivers/infiniband/hw/mlx5/ib_rep.c-90-{\ndrivers/infiniband/hw/mlx5/ib_rep.c:91:\tstruct mlx5_core_dev *peer_dev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-92-\tint i, ret;\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c-99-\ndrivers/infiniband/hw/mlx5/ib_rep.c:100:static int mlx5_ib_take_transport(struct mlx5_core_dev *dev)\ndrivers/infiniband/hw/mlx5/ib_rep.c-101-{\ndrivers/infiniband/hw/mlx5/ib_rep.c:102:\tstruct mlx5_core_dev *peer_dev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-103-\tint ret;\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c=117=static int\ndrivers/infiniband/hw/mlx5/ib_rep.c:118:mlx5_ib_vport_rep_load(struct mlx5_core_dev *dev, struct mlx5_eswitch_rep *rep)\ndrivers/infiniband/hw/mlx5/ib_rep.c-119-{\ndrivers/infiniband/hw/mlx5/ib_rep.c-120-\tu32 num_ports = mlx5_eswitch_get_total_vports(dev);\ndrivers/infiniband/hw/mlx5/ib_rep.c:121:\tstruct mlx5_core_dev *lag_master = dev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-122-\tconst struct mlx5_ib_profile *profile;\ndrivers/infiniband/hw/mlx5/ib_rep.c:123:\tstruct mlx5_core_dev *peer_dev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-124-\tstruct mlx5_ib_dev *ibdev;\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c=221=mlx5_ib_vport_rep_unload(struct mlx5_eswitch_rep *rep)\ndrivers/infiniband/hw/mlx5/ib_rep.c-222-{\ndrivers/infiniband/hw/mlx5/ib_rep.c:223:\tstruct mlx5_core_dev *mdev = mlx5_eswitch_get_core_dev(rep-\u003eesw);\ndrivers/infiniband/hw/mlx5/ib_rep.c-224-\tstruct mlx5_ib_dev *dev = mlx5_ib_rep_to_dev(rep);\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c-261-\t\tif (mlx5_lag_is_shared_fdb(mdev)) {\ndrivers/infiniband/hw/mlx5/ib_rep.c:262:\t\t\tstruct mlx5_core_dev *peer_mdev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-263-\t\t\tstruct mlx5_eswitch *esw;\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c=276=static const struct mlx5_eswitch_rep_ops rep_ops = {\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c-281-\ndrivers/infiniband/hw/mlx5/ib_rep.c:282:static void mlx5_ib_register_peer_vport_reps(struct mlx5_core_dev *mdev)\ndrivers/infiniband/hw/mlx5/ib_rep.c-283-{\ndrivers/infiniband/hw/mlx5/ib_rep.c:284:\tstruct mlx5_core_dev *peer_mdev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-285-\tstruct mlx5_eswitch *esw;\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c=319=static int mlx5r_rep_probe(struct auxiliary_device *adev,\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c-322-\tstruct mlx5_adev *idev = container_of(adev, struct mlx5_adev, adev);\ndrivers/infiniband/hw/mlx5/ib_rep.c:323:\tstruct mlx5_core_dev *mdev = idev-\u003emdev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-324-\tstruct mlx5_eswitch *esw;\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c=331=static void mlx5r_rep_remove(struct auxiliary_device *adev)\n--\ndrivers/infiniband/hw/mlx5/ib_rep.c-333-\tstruct mlx5_adev *idev = container_of(adev, struct mlx5_adev, adev);\ndrivers/infiniband/hw/mlx5/ib_rep.c:334:\tstruct mlx5_core_dev *mdev = idev-\u003emdev;\ndrivers/infiniband/hw/mlx5/ib_rep.c-335-\tstruct mlx5_eswitch *esw;\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c=50=int mlx5_ib_get_vf_config(struct ib_device *device, int vf, u32 port,\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c-53-\tstruct mlx5_ib_dev *dev = to_mdev(device);\ndrivers/infiniband/hw/mlx5/ib_virt.c:54:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/ib_virt.c-55-\tstruct mlx5_hca_vport_context *rep;\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c=92=int mlx5_ib_set_vf_link_state(struct ib_device *device, int vf,\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c-95-\tstruct mlx5_ib_dev *dev = to_mdev(device);\ndrivers/infiniband/hw/mlx5/ib_virt.c:96:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/ib_virt.c-97-\tstruct mlx5_hca_vport_context *in;\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c=120=int mlx5_ib_get_vf_stats(struct ib_device *device, int vf,\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c-123-\tint out_sz = MLX5_ST_SZ_BYTES(query_vport_counter_out);\ndrivers/infiniband/hw/mlx5/ib_virt.c:124:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/ib_virt.c-125-\tstruct mlx5_ib_dev *dev;\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c=151=static int set_vf_node_guid(struct ib_device *device, int vf, u32 port,\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c-154-\tstruct mlx5_ib_dev *dev = to_mdev(device);\ndrivers/infiniband/hw/mlx5/ib_virt.c:155:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/ib_virt.c-156-\tstruct mlx5_hca_vport_context *in;\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c=175=static int set_vf_port_guid(struct ib_device *device, int vf, u32 port,\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c-178-\tstruct mlx5_ib_dev *dev = to_mdev(device);\ndrivers/infiniband/hw/mlx5/ib_virt.c:179:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/ib_virt.c-180-\tstruct mlx5_hca_vport_context *in;\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c=210=int mlx5_ib_get_vf_guid(struct ib_device *device, int vf, u32 port,\n--\ndrivers/infiniband/hw/mlx5/ib_virt.c-214-\tstruct mlx5_ib_dev *dev = to_mdev(device);\ndrivers/infiniband/hw/mlx5/ib_virt.c:215:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/ib_virt.c-216-\tstruct mlx5_vf_context *vfs_ctx = mdev-\u003epriv.sriov.vfs_ctx;\n--\ndrivers/infiniband/hw/mlx5/mad.c=150=static void pma_cnt_ext_assign_ppcnt(struct ib_pma_portcounters_ext *cnt_ext,\n--\ndrivers/infiniband/hw/mlx5/mad.c-180-\ndrivers/infiniband/hw/mlx5/mad.c:181:static int query_ib_ppcnt(struct mlx5_core_dev *dev, u8 port_num, u8 plane_num,\ndrivers/infiniband/hw/mlx5/mad.c-182-\t\t\t  void *out, size_t sz, bool ext)\n--\ndrivers/infiniband/hw/mlx5/mad.c=209=static int process_pma_cmd(struct mlx5_ib_dev *dev, u32 port_num,\n--\ndrivers/infiniband/hw/mlx5/mad.c-211-{\ndrivers/infiniband/hw/mlx5/mad.c:212:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/mad.c-213-\tbool native_port = true;\n--\ndrivers/infiniband/hw/mlx5/mad.c=597=int mlx5_query_mad_ifc_port(struct ib_device *ibdev, u32 port,\n--\ndrivers/infiniband/hw/mlx5/mad.c-600-\tstruct mlx5_ib_dev *dev = to_mdev(ibdev);\ndrivers/infiniband/hw/mlx5/mad.c:601:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/mad.c-602-\tstruct ib_smp *in_mad;\n--\ndrivers/infiniband/hw/mlx5/main.c=205=static int mlx5_netdev_event(struct notifier_block *this,\n--\ndrivers/infiniband/hw/mlx5/main.c-211-\tstruct net_device *ib_ndev = NULL;\ndrivers/infiniband/hw/mlx5/main.c:212:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/main.c-213-\tstruct mlx5_ib_dev *ibdev;\n--\ndrivers/infiniband/hw/mlx5/main.c-311-\ndrivers/infiniband/hw/mlx5/main.c:312:struct mlx5_core_dev *mlx5_ib_get_native_port_mdev(struct mlx5_ib_dev *ibdev,\ndrivers/infiniband/hw/mlx5/main.c-313-\t\t\t\t\t\t   u32 ib_port_num,\n--\ndrivers/infiniband/hw/mlx5/main.c-317-\t\t\t\t\t\t\t  ib_port_num);\ndrivers/infiniband/hw/mlx5/main.c:318:\tstruct mlx5_core_dev *mdev = NULL;\ndrivers/infiniband/hw/mlx5/main.c-319-\tstruct mlx5_ib_multiport_info *mpi;\n--\ndrivers/infiniband/hw/mlx5/main.c=536=static int mlx5_query_port_roce(struct ib_device *device, u32 port_num,\n--\ndrivers/infiniband/hw/mlx5/main.c-540-\tu32 out[MLX5_ST_SZ_DW(ptys_reg)] = {0};\ndrivers/infiniband/hw/mlx5/main.c:541:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/main.c-542-\tstruct net_device *ndev, *upper;\n--\ndrivers/infiniband/hw/mlx5/main.c=772=static int mlx5_query_system_image_guid(struct ib_device *ibdev,\n--\ndrivers/infiniband/hw/mlx5/main.c-775-\tstruct mlx5_ib_dev *dev = to_mdev(ibdev);\ndrivers/infiniband/hw/mlx5/main.c:776:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-777-\tu64 tmp;\n--\ndrivers/infiniband/hw/mlx5/main.c=804=static int mlx5_query_max_pkeys(struct ib_device *ibdev,\n--\ndrivers/infiniband/hw/mlx5/main.c-807-\tstruct mlx5_ib_dev *dev = to_mdev(ibdev);\ndrivers/infiniband/hw/mlx5/main.c:808:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-809-\n--\ndrivers/infiniband/hw/mlx5/main.c=875=static int mlx5_query_node_desc(struct mlx5_ib_dev *dev, char *node_desc)\n--\ndrivers/infiniband/hw/mlx5/main.c-888-\ndrivers/infiniband/hw/mlx5/main.c:889:static void fill_esw_mgr_reg_c0(struct mlx5_core_dev *mdev,\ndrivers/infiniband/hw/mlx5/main.c-890-\t\t\t\tstruct mlx5_ib_query_device_resp *resp)\n--\ndrivers/infiniband/hw/mlx5/main.c=929=static u32 mlx5_ib_calc_max_qp_wr(struct mlx5_ib_dev *dev)\ndrivers/infiniband/hw/mlx5/main.c-930-{\ndrivers/infiniband/hw/mlx5/main.c:931:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-932-\tu32 max_wqe_bb_units = 1 \u003c\u003c MLX5_CAP_GEN(mdev, log_max_qp_sz);\n--\ndrivers/infiniband/hw/mlx5/main.c=945=static int mlx5_ib_query_device(struct ib_device *ibdev,\n--\ndrivers/infiniband/hw/mlx5/main.c-950-\tstruct mlx5_ib_dev *dev = to_mdev(ibdev);\ndrivers/infiniband/hw/mlx5/main.c:951:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-952-\tint err = -ENOMEM;\n--\ndrivers/infiniband/hw/mlx5/main.c=1462=static int mlx5_query_hca_port(struct ib_device *ibdev, u32 port,\n--\ndrivers/infiniband/hw/mlx5/main.c-1465-\tstruct mlx5_ib_dev *dev = to_mdev(ibdev);\ndrivers/infiniband/hw/mlx5/main.c:1466:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-1467-\tstruct mlx5_hca_vport_context *rep;\n--\ndrivers/infiniband/hw/mlx5/main.c=1542=int mlx5_ib_query_port(struct ib_device *ibdev, u32 port,\n--\ndrivers/infiniband/hw/mlx5/main.c-1566-\t\tstruct mlx5_ib_dev *dev = to_mdev(ibdev);\ndrivers/infiniband/hw/mlx5/main.c:1567:\t\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/main.c-1568-\t\tbool put_mdev = true;\n--\ndrivers/infiniband/hw/mlx5/main.c=1603=static int mlx5_ib_query_port_speed_from_port(struct mlx5_ib_dev *dev,\n--\ndrivers/infiniband/hw/mlx5/main.c-1626-\ndrivers/infiniband/hw/mlx5/main.c:1627:static int mlx5_ib_query_port_speed_from_vport(struct mlx5_core_dev *mdev,\ndrivers/infiniband/hw/mlx5/main.c-1628-\t\t\t\t\t       u8 op_mod, u16 vport,\n--\ndrivers/infiniband/hw/mlx5/main.c=1650=static int mlx5_ib_query_port_speed_from_bond(struct mlx5_ib_dev *dev,\n--\ndrivers/infiniband/hw/mlx5/main.c-1652-{\ndrivers/infiniband/hw/mlx5/main.c:1653:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-1654-\tu32 bond_speed;\n--\ndrivers/infiniband/hw/mlx5/main.c=1679=static int mlx5_ib_query_port_speed_rep(struct mlx5_ib_dev *dev, u32 port_num,\n--\ndrivers/infiniband/hw/mlx5/main.c-1682-\tstruct mlx5_eswitch_rep *rep;\ndrivers/infiniband/hw/mlx5/main.c:1683:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/main.c-1684-\tu16 op_mod;\n--\ndrivers/infiniband/hw/mlx5/main.c=1726=static int mlx5_ib_query_gid(struct ib_device *ibdev, u32 port, int index,\n--\ndrivers/infiniband/hw/mlx5/main.c-1729-\tstruct mlx5_ib_dev *dev = to_mdev(ibdev);\ndrivers/infiniband/hw/mlx5/main.c:1730:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-1731-\n--\ndrivers/infiniband/hw/mlx5/main.c=1745=static int mlx5_query_hca_nic_pkey(struct ib_device *ibdev, u32 port,\n--\ndrivers/infiniband/hw/mlx5/main.c-1748-\tstruct mlx5_ib_dev *dev = to_mdev(ibdev);\ndrivers/infiniband/hw/mlx5/main.c:1749:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/main.c-1750-\tbool put_mdev = true;\n--\ndrivers/infiniband/hw/mlx5/main.c=1816=static int set_port_caps_atomic(struct mlx5_ib_dev *dev, u32 port_num, u32 mask,\n--\ndrivers/infiniband/hw/mlx5/main.c-1819-\tstruct mlx5_hca_vport_context ctx = {};\ndrivers/infiniband/hw/mlx5/main.c:1820:\tstruct mlx5_core_dev *mdev;\ndrivers/infiniband/hw/mlx5/main.c-1821-\tu32 mdev_port_num;\n--\ndrivers/infiniband/hw/mlx5/main.c=1973=static void deallocate_uars(struct mlx5_ib_dev *dev,\n--\ndrivers/infiniband/hw/mlx5/main.c-1986-\ndrivers/infiniband/hw/mlx5/main.c:1987:static int mlx5_ib_enable_lb_mp(struct mlx5_core_dev *master,\ndrivers/infiniband/hw/mlx5/main.c:1988:\t\t\t\tstruct mlx5_core_dev *slave,\ndrivers/infiniband/hw/mlx5/main.c-1989-\t\t\t\tstruct mlx5_ib_lb_state *lb_state)\n--\ndrivers/infiniband/hw/mlx5/main.c-2008-\ndrivers/infiniband/hw/mlx5/main.c:2009:static void mlx5_ib_disable_lb_mp(struct mlx5_core_dev *master,\ndrivers/infiniband/hw/mlx5/main.c:2010:\t\t\t\t  struct mlx5_core_dev *slave,\ndrivers/infiniband/hw/mlx5/main.c-2011-\t\t\t\t  struct mlx5_ib_lb_state *lb_state)\n--\ndrivers/infiniband/hw/mlx5/main.c=3251=static void mlx5_ib_stage_sys_error_notifier_cleanup(struct mlx5_ib_dev *dev)\n--\ndrivers/infiniband/hw/mlx5/main.c-3255-\ndrivers/infiniband/hw/mlx5/main.c:3256:static int mlx5_ib_get_plane_num(struct mlx5_core_dev *mdev, u8 *num_plane)\ndrivers/infiniband/hw/mlx5/main.c-3257-{\n--\ndrivers/infiniband/hw/mlx5/main.c=3477=mlx5_ib_create_data_direct_resources(struct mlx5_ib_dev *dev)\n--\ndrivers/infiniband/hw/mlx5/main.c-3479-\tint inlen = MLX5_ST_SZ_BYTES(create_mkey_in);\ndrivers/infiniband/hw/mlx5/main.c:3480:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-3481-\tbool ro_supp = false;\n--\ndrivers/infiniband/hw/mlx5/main.c=3657=static int lag_event(struct notifier_block *nb, unsigned long event, void *data)\n--\ndrivers/infiniband/hw/mlx5/main.c-3660-\t\t\t\t\t       lag_events);\ndrivers/infiniband/hw/mlx5/main.c:3661:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-3662-\tstruct ib_device *ibdev = \u0026dev-\u003eib_dev;\n--\ndrivers/infiniband/hw/mlx5/main.c=3718=static int mlx5_eth_lag_init(struct mlx5_ib_dev *dev)\n--\ndrivers/infiniband/hw/mlx5/main.c-3720-\tstruct mlx5_flow_table_attr ft_attr = {};\ndrivers/infiniband/hw/mlx5/main.c:3721:\tstruct mlx5_core_dev *mdev = dev-\u003emdev;\ndrivers/infiniband/hw/mlx5/main.c-3722-\tstruct mlx5_flow_namespace *ns;\n--\ndrivers/infiniband/hw/mlx5/main.c=3751=static void mlx5_eth_lag_cleanup(struct mlx5_ib_dev *dev)\ndrivers/infiniband/hw/mlx5/main.c-3752-{\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 20095
							output: 21
							thoughts: 355
						

**Analyzing the mlx5 Driver for Fuzzing Potential**

Okay, so I'm looking at these Mellanox driver files – `drivers/fwctl/mlx5/main.c`, `drivers/infiniband/hw/mlx5/cmd.c`, and so on. My initial thought is, "Is there some kind of software emulation here?" I need to understand if this code could be tested without the actual hardware. I'll take a look at `drivers/net/ethernet/mellanox/mlx5/core/en_main.c` to see if there's a test driver or even a mock implementation.

Nope, from what I can tell, the mlx5 driver is clearly a physical device driver. It's meant to directly interact with hardware through PCI. Without the hardware, it won't even initialize. That rules out a simple setup.

Now I remember Syzkaller has some virtualized environments for fuzzing – USB gadget fuzzing, mac80211_hwsim, vhci, that sort of thing. But what about mlx5? Does Syzkaller have a comparable setup for fuzzing this specific driver? No, it's not emulating mlx5 PCI devices. We’re going to have to do something else.

Okay, let's step back. What if the target of the patch is buried within `drivers/net/ethernet/mellanox/mlx5/core/en_stats.c` or `en_main.c`? Is that code even reachable without hardware? This is going to require some sleuthing.

Let's check where `mlx5e_priv_init` is called. It looks like it’s called within `mlx5e_create_netdev`, `mlx5e_netdev_init_profile`, and `mlx5_rdma_setup_rn`. All of these require a `mlx5_core_dev` structure. Okay, so that `mlx5_core_dev` is created when the PCI device is probed. And since we don’t have mlx5 hardware within our fuzzing environment, that entire code path is going to be unreachable.

Wait, let me think. Is there a virtualized or simulated mlx5 device *somewhere*? Time to search the codebase for `mlx5_core_dev` creation.

{
  "Expression": "alloc_etherdev.*mlx5"
}

{
  "Output": "drivers/net/ethernet/mellanox/mlx5/core/en_main.c=6493=mlx5e_create_netdev(struct mlx5_core_dev *mdev, const struct mlx5e_profile *profile)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6501-\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c:6502:\tnetdev = alloc_etherdev_mqs(sizeof(struct mlx5e_priv), txqs, rxqs);\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-6503-\tif (!netdev) {\n"
}

gemini-3.1-pro-preview

null

null

							input: 21171
							output: 21
							thoughts: 16
						

Here's my thought process, as if I were considering this issue:

**Delving into the MLX5 Driver Probe**

Okay, I need to get to the bottom of this. Considering this is likely a hardware initialization issue, my first instinct is to zero in on the PCI probe functions. Let's see... the `mlx5_pci_probe` function (or a similar one, depending on the specific Mellanox driver version and architecture) is where the driver interacts with the PCI bus to identify and initialize the hardware. That’s the logical starting point. I need to understand what's happening there during the initialization sequence. I'll need to examine the return codes, error handling, and resource allocation within that function to pinpoint the exact failure. It’s likely a resource issue, a firmware version mismatch, or potentially a configuration problem. Time to dig in!

{
  "Expression": "pci_driver.*mlx5"
}

{
  "Output": "drivers/infiniband/hw/mlx5/data_direct.c=201=static void mlx5_data_direct_remove(struct pci_dev *pdev)\n--\ndrivers/infiniband/hw/mlx5/data_direct.c-210-\ndrivers/infiniband/hw/mlx5/data_direct.c:211:static struct pci_driver mlx5_data_direct_driver = {\ndrivers/infiniband/hw/mlx5/data_direct.c-212-\t.name = KBUILD_MODNAME,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/main.c=2265=int mlx5_recover_device(struct mlx5_core_dev *dev)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/main.c-2275-\ndrivers/net/ethernet/mellanox/mlx5/core/main.c:2276:static struct pci_driver mlx5_core_driver = {\ndrivers/net/ethernet/mellanox/mlx5/core/main.c-2277-\t.name           = KBUILD_MODNAME,\n--\ndrivers/vfio/pci/mlx5/main.c=1444=static const struct pci_error_handlers mlx5vf_err_handlers = {\n--\ndrivers/vfio/pci/mlx5/main.c-1448-\ndrivers/vfio/pci/mlx5/main.c:1449:static struct pci_driver mlx5vf_pci_driver = {\ndrivers/vfio/pci/mlx5/main.c-1450-\t.name = KBUILD_MODNAME,\n--\ndrivers/vfio/pci/mlx5/main.c-1457-\ndrivers/vfio/pci/mlx5/main.c:1458:module_pci_driver(mlx5vf_pci_driver);\ndrivers/vfio/pci/mlx5/main.c-1459-\n"
}

gemini-3.1-pro-preview

null

null

							input: 21915
							output: 22
							thoughts: 318
						

**My Assessment of the Patch's Fuzzing Suitability**

Okay, so the prompt is asking about whether this patch is worth fuzzing, and it looks like it's pretty clear cut. This confirms it is a PCI driver. The code changes are all within `drivers/net/ethernet/mellanox/mlx5` – specifically within `en_main.c`, `en_stats.c`, `en.h`, and `include/linux/ethtool.h`. It looks like they are adding a buffer to a struct. My initial thought is that this is going to be a non-starter for fuzzing, which means the WorthFuzzing parameter should be false.

Let me think this through methodically. Is there *any* software emulation of an mlx5 device in the kernel? I remember that there's not. No, there's nothing I can think of off the top of my head. Wait, what about `netdevsim`? Does *that* emulate mlx5? No, that is there to emulate a generic network device, for testing devlink and tc offloads. What about `vdpa`? `vdpa_sim` specifically emulates virtio, not mlx5.

So, realistically, mlx5 code paths are *completely* inaccessible in virtualized environments like GCE or QEMU without hardware passthrough. The prompt *explicitly* states that we should return `WorthFuzzing=false` if the changes involve unreachable code paths in these environments. The prompt specifies this for things such as USB gadgets and mac80211_hwsim.

Since the patch only modifies the mlx5 driver and requires physical hardware, the changes are impossible to reach in *our* fuzzing environment.

Now, wait a minute, I need to be absolutely sure. Is that `ethtool_fec_hist` structure *only* used within the mlx5 driver? Let me double-check the include file `include/linux/ethtool.h` to be absolutely certain. Okay, I'm confident in my assessment. The WorthFuzzing parameter should be false.

{
  "Expression": "ethtool_fec_hist"
}

{
  "Output": "Documentation/networking/statistics.rst=237=them with 0.\n--\nDocumentation/networking/statistics.rst-241-- ``struct ethtool_eth_phy_stats``\nDocumentation/networking/statistics.rst:242:- ``struct ethtool_fec_hist``\nDocumentation/networking/statistics.rst-243-- ``struct ethtool_fec_stats``\n--\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c=3208=static int bnxt_get_fecparam(struct net_device *dev,\n--\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c-3253-\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:3254:static const struct ethtool_fec_hist_range bnxt_fec_ranges[] = {\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c-3255-\t{ 0, 0},\n--\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c=3274=static void bnxt_hwrm_port_phy_fdrstat(struct bnxt *bp,\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:3275:\t\t\t\t       struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c-3276-{\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:3277:\tstruct ethtool_fec_hist_value *values = hist-\u003evalues;\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c-3278-\tstruct hwrm_port_phy_fdrstat_output *resp;\n--\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c=3304=static void bnxt_get_fec_stats(struct net_device *dev,\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c-3305-\t\t\t       struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:3306:\t\t\t       struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c-3307-{\n--\ndrivers/net/ethernet/fungible/funeth/funeth_ethtool.c=932=static void fun_get_fec_stats(struct net_device *netdev,\ndrivers/net/ethernet/fungible/funeth/funeth_ethtool.c-933-\t\t\t      struct ethtool_fec_stats *stats,\ndrivers/net/ethernet/fungible/funeth/funeth_ethtool.c:934:\t\t\t      struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/fungible/funeth/funeth_ethtool.c-935-{\n--\ndrivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c=1664=static void hns3_get_fec_stats(struct net_device *netdev,\ndrivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c-1665-\t\t\t       struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c:1666:\t\t\t       struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c-1667-{\n--\ndrivers/net/ethernet/intel/ice/ice_ethtool.c=4636=static void ice_get_fec_stats(struct net_device *netdev,\ndrivers/net/ethernet/intel/ice/ice_ethtool.c-4637-\t\t\t      struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/intel/ice/ice_ethtool.c:4638:\t\t\t      struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/intel/ice/ice_ethtool.c-4639-{\n--\ndrivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c=1297=static void otx2_get_fec_stats(struct net_device *netdev,\ndrivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c-1298-\t\t\t       struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c:1299:\t\t\t       struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c-1300-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c=1926=static void mlx5e_get_fec_stats(struct net_device *netdev,\ndrivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c-1927-\t\t\t\tstruct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1928:\t\t\t\tstruct ethtool_fec_hist *hist)\ndrivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c-1929-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c=1552=fec_rs_histogram_fill_ranges(struct mlx5e_priv *priv, int mode,\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c:1553:\t\t\t     struct ethtool_fec_hist_range *ranges)\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c-1554-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c=1585=static void fec_rs_histogram_fill_stats(struct mlx5e_priv *priv,\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c-1586-\t\t\t\t\tu8 num_of_bins,\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c:1587:\t\t\t\t\tstruct ethtool_fec_hist *hist)\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c-1588-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c=1611=static void fec_set_histograms_stats(struct mlx5e_priv *priv, int mode,\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c:1612:\t\t\t\t     struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c-1613-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c=1634=void mlx5e_stats_fec_get(struct mlx5e_priv *priv,\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c-1635-\t\t\t struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c:1636:\t\t\t struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.c-1637-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.h=119=void mlx5e_stats_fec_get(struct mlx5e_priv *priv,\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.h-120-\t\t\t struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.h:121:\t\t\t struct ethtool_fec_hist *hist);\ndrivers/net/ethernet/mellanox/mlx5/core/en_stats.h-122-\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_ethtool.c=1862=fbnic_get_fec_stats(struct net_device *netdev,\ndrivers/net/ethernet/meta/fbnic/fbnic_ethtool.c-1863-\t\t    struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/meta/fbnic/fbnic_ethtool.c:1864:\t\t    struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/meta/fbnic/fbnic_ethtool.c-1865-{\n--\ndrivers/net/ethernet/sfc/ethtool.c=219=static void efx_ethtool_get_fec_stats(struct net_device *net_dev,\ndrivers/net/ethernet/sfc/ethtool.c-220-\t\t\t\t      struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/sfc/ethtool.c:221:\t\t\t\t      struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/sfc/ethtool.c-222-{\n--\ndrivers/net/ethernet/sfc/siena/ethtool.c=219=static void efx_ethtool_get_fec_stats(struct net_device *net_dev,\ndrivers/net/ethernet/sfc/siena/ethtool.c-220-\t\t\t\t      struct ethtool_fec_stats *fec_stats,\ndrivers/net/ethernet/sfc/siena/ethtool.c:221:\t\t\t\t      struct ethtool_fec_hist *hist)\ndrivers/net/ethernet/sfc/siena/ethtool.c-222-{\n--\ndrivers/net/netdevsim/ethtool.c=152=nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)\n--\ndrivers/net/netdevsim/ethtool.c-167-\ndrivers/net/netdevsim/ethtool.c:168:static const struct ethtool_fec_hist_range netdevsim_fec_ranges[] = {\ndrivers/net/netdevsim/ethtool.c-169-\t{ 0, 0},\n--\ndrivers/net/netdevsim/ethtool.c=176=nsim_get_fec_stats(struct net_device *dev, struct ethtool_fec_stats *fec_stats,\ndrivers/net/netdevsim/ethtool.c:177:\t\t   struct ethtool_fec_hist *hist)\ndrivers/net/netdevsim/ethtool.c-178-{\ndrivers/net/netdevsim/ethtool.c:179:\tstruct ethtool_fec_hist_value *values = hist-\u003evalues;\ndrivers/net/netdevsim/ethtool.c-180-\n--\ninclude/linux/ethtool.h=533=struct ethtool_pause_stats {\n--\ninclude/linux/ethtool.h-548-/**\ninclude/linux/ethtool.h:549: * struct ethtool_fec_hist_range - error bits range for FEC histogram\ninclude/linux/ethtool.h-550- * statistics\n--\ninclude/linux/ethtool.h-553- */\ninclude/linux/ethtool.h:554:struct ethtool_fec_hist_range {\ninclude/linux/ethtool.h-555-\tu16 low;\n--\ninclude/linux/ethtool.h-558-\ninclude/linux/ethtool.h:559:struct ethtool_fec_hist {\ninclude/linux/ethtool.h:560:\tstruct ethtool_fec_hist_value {\ninclude/linux/ethtool.h-561-\t\tu64 sum;\n--\ninclude/linux/ethtool.h-563-\t} values[ETHTOOL_FEC_HIST_MAX];\ninclude/linux/ethtool.h:564:\tconst struct ethtool_fec_hist_range *ranges;\ninclude/linux/ethtool.h:565:\tstruct ethtool_fec_hist_range ranges_buf[ETHTOOL_FEC_HIST_MAX];\ninclude/linux/ethtool.h-566-};\n--\ninclude/linux/ethtool.h=1200=struct ethtool_ops {\n--\ninclude/linux/ethtool.h-1320-\t\t\t\t struct ethtool_fec_stats *fec_stats,\ninclude/linux/ethtool.h:1321:\t\t\t\t struct ethtool_fec_hist *hist);\ninclude/linux/ethtool.h-1322-\tint\t(*get_fecparam)(struct net_device *,\n--\nnet/ethtool/fec.c=11=struct fec_reply_data {\n--\nnet/ethtool/fec.c-19-\t} corr, uncorr, corr_bits;\nnet/ethtool/fec.c:20:\tstruct ethtool_fec_hist fec_stat_hist;\nnet/ethtool/fec.c-21-};\n--\nnet/ethtool/fec.c=180=static int fec_put_hist(struct sk_buff *skb,\nnet/ethtool/fec.c:181:\t\t\tconst struct ethtool_fec_hist *hist)\nnet/ethtool/fec.c-182-{\nnet/ethtool/fec.c:183:\tconst struct ethtool_fec_hist_range *ranges = hist-\u003eranges;\nnet/ethtool/fec.c:184:\tconst struct ethtool_fec_hist_value *values = hist-\u003evalues;\nnet/ethtool/fec.c-185-\tstruct nlattr *nest;\n"
}

gemini-3.1-pro-preview

null

null

							input: 26468
							output: 20
							thoughts: 377
						

**Analyzing the Potential Impact of a Network Driver Patch**

Okay, so this patch is adding `ranges_buf` to `struct ethtool_fec_hist` in `include/linux/ethtool.h`. My immediate thought is, "Okay, a struct change... let's see where this is used." I see it's used in `net/ethtool/fec.c` and a few drivers. The key here is that the patch also tweaks `drivers/net/ethernet/mellanox/mlx5/core/en_stats.c` and `en_main.c` to *use* this new buffer instead of allocating it on the fly. Hold on a second, the real logic change is *within* the `mlx5` driver, which is hardware-specific and thus, unfortunately, unreachable in my fuzzing setup.

Let's quickly confirm no other drivers are modified. Nope, just `mlx5`. So, effectively, the core functional change is entirely localized to the `mlx5` driver. Since that driver requires physical Mellanox hardware and I'm in a virtualized environment, it's a dead end for my fuzzing efforts. It doesn't seem like the patch can cause any problems for my tests.

But, being the paranoid expert that I am, I'll double-check this: the change in `ethtool.h` is just a struct definition change, but it increases the struct size. Let's make sure that's not going to bite us down the line. The size increases by `ETHTOOL_FEC_HIST_MAX * sizeof(struct ethtool_fec_hist_range)` which is 8 * 4 = 32 bytes. Now, where is `struct ethtool_fec_hist` embedded? Ah, it's embedded within `struct fec_reply_data` in `net/ethtool/fec.c`. The question now is, is `struct fec_reply_data` allocated statically or dynamically, either on stack or heap? Let's take a look at `net/ethtool/fec.c` for allocation details.

{
  "Expression": "fec_reply_data"
}

{
  "Output": "net/ethtool/fec.c=7=struct fec_req_info {\n--\nnet/ethtool/fec.c-10-\nnet/ethtool/fec.c:11:struct fec_reply_data {\nnet/ethtool/fec.c-12-\tstruct ethnl_reply_data\t\tbase;\n--\nnet/ethtool/fec.c-23-#define FEC_REPDATA(__reply_base) \\\nnet/ethtool/fec.c:24:\tcontainer_of(__reply_base, struct fec_reply_data, base)\nnet/ethtool/fec.c-25-\n--\nnet/ethtool/fec.c=94=static int fec_prepare_data(const struct ethnl_req_info *req_base,\n--\nnet/ethtool/fec.c-98-\t__ETHTOOL_DECLARE_LINK_MODE_MASK(active_fec_modes) = {};\nnet/ethtool/fec.c:99:\tstruct fec_reply_data *data = FEC_REPDATA(reply_base);\nnet/ethtool/fec.c-100-\tstruct net_device *dev = reply_base-\u003edev;\n--\nnet/ethtool/fec.c=146=static int fec_reply_size(const struct ethnl_req_info *req_base,\n--\nnet/ethtool/fec.c-149-\tbool compact = req_base-\u003eflags \u0026 ETHTOOL_FLAG_COMPACT_BITSETS;\nnet/ethtool/fec.c:150:\tconst struct fec_reply_data *data = FEC_REPDATA(reply_base);\nnet/ethtool/fec.c-151-\tint len = 0;\n--\nnet/ethtool/fec.c=180=static int fec_put_hist(struct sk_buff *skb,\n--\nnet/ethtool/fec.c-234-\nnet/ethtool/fec.c:235:static int fec_put_stats(struct sk_buff *skb, const struct fec_reply_data *data)\nnet/ethtool/fec.c-236-{\n--\nnet/ethtool/fec.c=265=static int fec_fill_reply(struct sk_buff *skb,\n--\nnet/ethtool/fec.c-269-\tbool compact = req_base-\u003eflags \u0026 ETHTOOL_FLAG_COMPACT_BITSETS;\nnet/ethtool/fec.c:270:\tconst struct fec_reply_data *data = FEC_REPDATA(reply_base);\nnet/ethtool/fec.c-271-\tint ret;\n--\nnet/ethtool/fec.c=350=const struct ethnl_request_ops ethnl_fec_request_ops = {\n--\nnet/ethtool/fec.c-354-\t.req_info_size\t\t= sizeof(struct fec_req_info),\nnet/ethtool/fec.c:355:\t.reply_data_size\t= sizeof(struct fec_reply_data),\nnet/ethtool/fec.c-356-\n"
}

gemini-3.1-pro-preview

null

null

							input: 28152
							output: 122
							thoughts: 121
						

**My Assessment of the ethtool netlink framework change**

Okay, so I've looked into this. The `ethnl_fec_request_ops` structure now specifies a `.reply_data_size` of `sizeof(struct fec_reply_data)`. This tells the ethtool netlink framework how much memory to allocate for the reply data. The increase is actually pretty minor, only 32 bytes, and the framework itself handles the dynamic allocation, so that's good. Functionally, the impact is isolated to the `mlx5` driver. But here's the kicker: `mlx5` is a hardware-specific driver. Because it's hardware, it's not going to be triggered in a virtualized environment. That means, from a practical fuzzing standpoint, it's not a relevant area of concern. Therefore, I'm going to mark this as `WorthFuzzing=false`. No point spending resources on something that we can't effectively test.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mellanox mlx5 driver to use an embedded buffer for FEC histogram ranges instead of dynamically allocating it. Since mlx5 is a physical hardware driver and is not emulated in virtualized environments like QEMU or GCE, these code paths are unreachable during fuzzing. The change to `struct ethtool_fec_hist` only increases its size slightly and does not introduce new reachable logic for other drivers.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mellanox mlx5 driver to use an embedded buffer for FEC histogram ranges instead of dynamically allocating it. Since mlx5 is a physical hardware driver and is not emulated in virtualized environments like QEMU or GCE, these code paths are unreachable during fuzzing. The change to `struct ethtool_fec_hist` only increases its size slightly and does not introduce new reachable logic for other drivers.",
  "WorthFuzzing": false
}