AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/07/03 01:50 flow patch-triage
1m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mellanox mlx5 ethernet driver (mlx5e_poll_tx_cq). This is a physical hardware driver for Mellanox ConnectX adapters and there is no software emulation available for it in QEMU or the kernel. Therefore, the modified code paths are impossible to reach in virtualized fuzzing environments.",
  "WorthFuzzing": false
}
1/1 2026/07/03 01:50 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit e09504bc0869d302e70d109e5fe6ca211dd32908\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Fri Jul 3 01:50:39 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c\nindex 7f33261ba6553b..b940280af19dbf 100644\n--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c\n+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c\n@@ -171,6 +171,7 @@ static const struct counter_desc sw_stats_desc[] = {\n \t{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_cqes) },\n \t{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_queue_wake) },\n \t{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_cqe_err) },\n+\t{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_time_budget_exit) },\n \t{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_xdp_xmit) },\n \t{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_xdp_mpwqe) },\n \t{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_xdp_inlnw) },\n@@ -426,6 +427,7 @@ static void mlx5e_stats_grp_sw_update_stats_sq(struct mlx5e_sw_stats *s,\n \ts-\u003etx_queue_wake            += sq_stats-\u003ewake;\n \ts-\u003etx_queue_dropped         += sq_stats-\u003edropped;\n \ts-\u003etx_cqe_err               += sq_stats-\u003ecqe_err;\n+\ts-\u003etx_time_budget_exit      += sq_stats-\u003etime_budget_exit;\n \ts-\u003etx_recover               += sq_stats-\u003erecover;\n \ts-\u003etx_xmit_more             += sq_stats-\u003exmit_more;\n \ts-\u003etx_csum_partial_inner    += sq_stats-\u003ecsum_partial_inner;\n@@ -2323,6 +2325,7 @@ static const struct counter_desc sq_stats_desc[] = {\n \t{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, cqes) },\n \t{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, wake) },\n \t{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, cqe_err) },\n+\t{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, time_budget_exit) },\n };\n \n static const struct counter_desc rq_xdpsq_stats_desc[] = {\n@@ -2399,6 +2402,7 @@ static const struct counter_desc ptp_sq_stats_desc[] = {\n \t{ MLX5E_DECLARE_PTP_TX_STAT(struct mlx5e_sq_stats, cqes) },\n \t{ MLX5E_DECLARE_PTP_TX_STAT(struct mlx5e_sq_stats, wake) },\n \t{ MLX5E_DECLARE_PTP_TX_STAT(struct mlx5e_sq_stats, cqe_err) },\n+\t{ MLX5E_DECLARE_PTP_TX_STAT(struct mlx5e_sq_stats, time_budget_exit) },\n };\n \n static const struct counter_desc ptp_ch_stats_desc[] = {\n@@ -2476,6 +2480,7 @@ static const struct counter_desc qos_sq_stats_desc[] = {\n \t{ MLX5E_DECLARE_QOS_TX_STAT(struct mlx5e_sq_stats, cqes) },\n \t{ MLX5E_DECLARE_QOS_TX_STAT(struct mlx5e_sq_stats, wake) },\n \t{ MLX5E_DECLARE_QOS_TX_STAT(struct mlx5e_sq_stats, cqe_err) },\n+\t{ MLX5E_DECLARE_QOS_TX_STAT(struct mlx5e_sq_stats, time_budget_exit) },\n };\n \n #define NUM_RQ_STATS\t\t\tARRAY_SIZE(rq_stats_desc)\ndiff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h\nindex 09f155acb461bc..5ba954f42ccd5b 100644\n--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h\n+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h\n@@ -187,6 +187,7 @@ struct mlx5e_sw_stats {\n \tu64 tx_cqes;\n \tu64 tx_queue_wake;\n \tu64 tx_cqe_err;\n+\tu64 tx_time_budget_exit;\n \tu64 tx_xdp_xmit;\n \tu64 tx_xdp_mpwqe;\n \tu64 tx_xdp_inlnw;\n@@ -445,6 +446,7 @@ struct mlx5e_sq_stats {\n \tu64 cqes ____cacheline_aligned_in_smp;\n \tu64 wake;\n \tu64 cqe_err;\n+\tu64 time_budget_exit;\n };\n \n struct mlx5e_xdpsq_stats {\ndiff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c\nindex 0b5e600e4a6a95..994df912b765cb 100644\n--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c\n+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c\n@@ -43,6 +43,13 @@\n #include \"en_accel/macsec.h\"\n #include \"en/ptp.h\"\n #include \u003cnet/ipv6.h\u003e\n+#include \u003clinux/moduleparam.h\u003e\n+#include \u003clinux/sched/clock.h\u003e\n+\n+static unsigned int mlx5e_tx_cq_time_budget_us = 500;\n+module_param_named(tx_cq_time_budget_us, mlx5e_tx_cq_time_budget_us, uint, 0644);\n+MODULE_PARM_DESC(tx_cq_time_budget_us,\n+\t\t \"Max microseconds one TX CQ poll may spend before yielding (0 = unbounded)\");\n \n static void mlx5e_dma_unmap_wqe_err(struct mlx5e_txqsq *sq, u8 num_dma)\n {\n@@ -760,9 +767,12 @@ void mlx5e_txqsq_wake(struct mlx5e_txqsq *sq)\n bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)\n {\n \tstruct mlx5e_sq_stats *stats;\n+\tbool time_exceeded = false;\n+\tu64 time_budget_end = 0;\n \tstruct mlx5e_txqsq *sq;\n \tstruct mlx5_cqe64 *cqe;\n \tu32 dma_fifo_cc;\n+\tu32 budget_us;\n \tu32 nbytes;\n \tu16 npkts;\n \tu16 sqcc;\n@@ -790,6 +800,10 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)\n \t/* avoid dirtying sq cache line every cqe */\n \tdma_fifo_cc = sq-\u003edma_fifo_cc;\n \n+\tbudget_us = READ_ONCE(mlx5e_tx_cq_time_budget_us);\n+\tif (budget_us)\n+\t\ttime_budget_end = local_clock() + (u64)budget_us * NSEC_PER_USEC;\n+\n \ti = 0;\n \tdo {\n \t\tstruct mlx5e_tx_wqe_info *wi;\n@@ -842,8 +856,19 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)\n \t\t\tstats-\u003ecqe_err++;\n \t\t}\n \n+\t\t/* Check between CQEs only (sqcc/dma_fifo_cc must advance together). */\n+\t\tif (unlikely(time_budget_end \u0026\u0026 (i \u0026 7) == 7 \u0026\u0026\n+\t\t\t     local_clock() \u003e= time_budget_end)) {\n+\t\t\ttime_exceeded = true;\n+\t\t\ti++;\n+\t\t\tbreak;\n+\t\t}\n+\n \t} while ((++i \u003c MLX5E_TX_CQ_POLL_BUDGET) \u0026\u0026 (cqe = mlx5_cqwq_get_cqe(\u0026cq-\u003ewq)));\n \n+\tif (unlikely(time_exceeded))\n+\t\tstats-\u003etime_budget_exit++;\n+\n \tstats-\u003ecqes += i;\n \n \tmlx5_cqwq_update_db_record(\u0026cq-\u003ewq);\n@@ -858,7 +883,7 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)\n \n \tmlx5e_txqsq_wake(sq);\n \n-\treturn (i == MLX5E_TX_CQ_POLL_BUDGET);\n+\treturn time_exceeded || (i == MLX5E_TX_CQ_POLL_BUDGET);\n }\n \n static void mlx5e_tx_wi_kfree_fifo_skbs(struct mlx5e_txqsq *sq, struct mlx5e_tx_wqe_info *wi)\n@@ -879,6 +904,8 @@ void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq)\n \tdma_fifo_cc = sq-\u003edma_fifo_cc;\n \n \twhile (sqcc != sq-\u003epc) {\n+\t\tcond_resched();\n+\n \t\tci = mlx5_wq_cyc_ctr2ix(\u0026sq-\u003ewq, sqcc);\n \t\twi = \u0026sq-\u003edb.wqe_info[ci];\n \n"
}
2/1 2026/07/03 01:50 agent patch-evaluator
1m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mellanox mlx5 ethernet driver (mlx5e_poll_tx_cq). This is a physical hardware driver for Mellanox ConnectX adapters and there is no software emulation available for it in QEMU or the kernel. Therefore, the modified code paths are impossible to reach in virtualized fuzzing environments.",
  "WorthFuzzing": false
}

Instruction: 
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.

Prompt: 
For your convenience, here is the diff of the changes:
commit e09504bc0869d302e70d109e5fe6ca211dd32908
Author: syz-cluster <triage@syzkaller.com>
Date:   Fri Jul 3 01:50:39 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
index 7f33261ba6553b..b940280af19dbf 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
@@ -171,6 +171,7 @@ static const struct counter_desc sw_stats_desc[] = {
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_cqes) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_queue_wake) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_cqe_err) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_time_budget_exit) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_xdp_xmit) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_xdp_mpwqe) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_xdp_inlnw) },
@@ -426,6 +427,7 @@ static void mlx5e_stats_grp_sw_update_stats_sq(struct mlx5e_sw_stats *s,
 	s->tx_queue_wake            += sq_stats->wake;
 	s->tx_queue_dropped         += sq_stats->dropped;
 	s->tx_cqe_err               += sq_stats->cqe_err;
+	s->tx_time_budget_exit      += sq_stats->time_budget_exit;
 	s->tx_recover               += sq_stats->recover;
 	s->tx_xmit_more             += sq_stats->xmit_more;
 	s->tx_csum_partial_inner    += sq_stats->csum_partial_inner;
@@ -2323,6 +2325,7 @@ static const struct counter_desc sq_stats_desc[] = {
 	{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, cqes) },
 	{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, wake) },
 	{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, cqe_err) },
+	{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, time_budget_exit) },
 };
 
 static const struct counter_desc rq_xdpsq_stats_desc[] = {
@@ -2399,6 +2402,7 @@ static const struct counter_desc ptp_sq_stats_desc[] = {
 	{ MLX5E_DECLARE_PTP_TX_STAT(struct mlx5e_sq_stats, cqes) },
 	{ MLX5E_DECLARE_PTP_TX_STAT(struct mlx5e_sq_stats, wake) },
 	{ MLX5E_DECLARE_PTP_TX_STAT(struct mlx5e_sq_stats, cqe_err) },
+	{ MLX5E_DECLARE_PTP_TX_STAT(struct mlx5e_sq_stats, time_budget_exit) },
 };
 
 static const struct counter_desc ptp_ch_stats_desc[] = {
@@ -2476,6 +2480,7 @@ static const struct counter_desc qos_sq_stats_desc[] = {
 	{ MLX5E_DECLARE_QOS_TX_STAT(struct mlx5e_sq_stats, cqes) },
 	{ MLX5E_DECLARE_QOS_TX_STAT(struct mlx5e_sq_stats, wake) },
 	{ MLX5E_DECLARE_QOS_TX_STAT(struct mlx5e_sq_stats, cqe_err) },
+	{ MLX5E_DECLARE_QOS_TX_STAT(struct mlx5e_sq_stats, time_budget_exit) },
 };
 
 #define NUM_RQ_STATS			ARRAY_SIZE(rq_stats_desc)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
index 09f155acb461bc..5ba954f42ccd5b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
@@ -187,6 +187,7 @@ struct mlx5e_sw_stats {
 	u64 tx_cqes;
 	u64 tx_queue_wake;
 	u64 tx_cqe_err;
+	u64 tx_time_budget_exit;
 	u64 tx_xdp_xmit;
 	u64 tx_xdp_mpwqe;
 	u64 tx_xdp_inlnw;
@@ -445,6 +446,7 @@ struct mlx5e_sq_stats {
 	u64 cqes ____cacheline_aligned_in_smp;
 	u64 wake;
 	u64 cqe_err;
+	u64 time_budget_exit;
 };
 
 struct mlx5e_xdpsq_stats {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
index 0b5e600e4a6a95..994df912b765cb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
@@ -43,6 +43,13 @@
 #include "en_accel/macsec.h"
 #include "en/ptp.h"
 #include <net/ipv6.h>
+#include <linux/moduleparam.h>
+#include <linux/sched/clock.h>
+
+static unsigned int mlx5e_tx_cq_time_budget_us = 500;
+module_param_named(tx_cq_time_budget_us, mlx5e_tx_cq_time_budget_us, uint, 0644);
+MODULE_PARM_DESC(tx_cq_time_budget_us,
+		 "Max microseconds one TX CQ poll may spend before yielding (0 = unbounded)");
 
 static void mlx5e_dma_unmap_wqe_err(struct mlx5e_txqsq *sq, u8 num_dma)
 {
@@ -760,9 +767,12 @@ void mlx5e_txqsq_wake(struct mlx5e_txqsq *sq)
 bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
 {
 	struct mlx5e_sq_stats *stats;
+	bool time_exceeded = false;
+	u64 time_budget_end = 0;
 	struct mlx5e_txqsq *sq;
 	struct mlx5_cqe64 *cqe;
 	u32 dma_fifo_cc;
+	u32 budget_us;
 	u32 nbytes;
 	u16 npkts;
 	u16 sqcc;
@@ -790,6 +800,10 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
 	/* avoid dirtying sq cache line every cqe */
 	dma_fifo_cc = sq->dma_fifo_cc;
 
+	budget_us = READ_ONCE(mlx5e_tx_cq_time_budget_us);
+	if (budget_us)
+		time_budget_end = local_clock() + (u64)budget_us * NSEC_PER_USEC;
+
 	i = 0;
 	do {
 		struct mlx5e_tx_wqe_info *wi;
@@ -842,8 +856,19 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
 			stats->cqe_err++;
 		}
 
+		/* Check between CQEs only (sqcc/dma_fifo_cc must advance together). */
+		if (unlikely(time_budget_end && (i & 7) == 7 &&
+			     local_clock() >= time_budget_end)) {
+			time_exceeded = true;
+			i++;
+			break;
+		}
+
 	} while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
 
+	if (unlikely(time_exceeded))
+		stats->time_budget_exit++;
+
 	stats->cqes += i;
 
 	mlx5_cqwq_update_db_record(&cq->wq);
@@ -858,7 +883,7 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
 
 	mlx5e_txqsq_wake(sq);
 
-	return (i == MLX5E_TX_CQ_POLL_BUDGET);
+	return time_exceeded || (i == MLX5E_TX_CQ_POLL_BUDGET);
 }
 
 static void mlx5e_tx_wi_kfree_fifo_skbs(struct mlx5e_txqsq *sq, struct mlx5e_tx_wqe_info *wi)
@@ -879,6 +904,8 @@ void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq)
 	dma_fifo_cc = sq->dma_fifo_cc;
 
 	while (sqcc != sq->pc) {
+		cond_resched();
+
 		ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sqcc);
 		wi = &sq->db.wqe_info[ci];

3/2 2026/07/03 01:50 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 4369
							output: 23
							thoughts: 395

Thoughts: 
**Analyzing the Mellanox mlx5 Patch for Fuzzing Potential**

Okay, so I've got this patch for the Mellanox mlx5 ethernet driver. It seems to introduce a new module parameter, `tx_cq_time_budget_us`, to limit the time spent in `mlx5e_poll_tx_cq`. It also includes a new statistic, `tx_time_budget_exit`, to track when that time budget is exceeded and a `cond_resched()` call in `mlx5e_free_txqsq_descs`. My initial thought is to assess its fuzzing potential.

`mlx5e_poll_tx_cq` is a high-performance function – a hot path for polling the transmit completion queue, and that makes it interesting. The patch adds a time check using `local_clock()` and a break condition if the budget is exceeded, which could introduce subtle timing-related bugs. The `cond_resched()` call in `mlx5e_free_txqsq_descs` is also worth a closer look for possible race conditions, although the location makes it less of a hot spot.

The main concern now, given my experience, is reachability. Mellanox mlx5 is, as I recall, a physical network card driver. My primary question is how accessible is this code in a typical fuzzing setup? Hardware requirements are the immediate problem. Is this something that can be emulated or bypassed? I need to figure out if we have any kind of vDPA implementation or something similar that might allow us to exercise this code in a virtualized environment. Without something like that, this is likely a non-starter.

I need to confirm if our fuzzing environment has PCI emulation capable of running the mlx5 driver. QEMU comes to mind. Does QEMU even emulate mlx5? The obvious answer is likely no, at least not in a way that syzkaller would typically leverage. However, I'm now recalling something about `mlx5` vDPA. I need to do a kernel search to confirm and see if we can get this to work. I have a feeling the vDPA path is where the real potential lies.

4/2 2026/07/03 01:50 tool grepper
0m Args: 
{
  "Expression": "mlx5e_poll_tx_cq"
}

Results: 
{
  "Output": "drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c=273=static int mlx5e_ptp_napi_poll(struct napi_struct *napi, int budget)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en/ptp.c-287-\t\tfor (i = 0; i \u003c c-\u003enum_tc; i++) {\ndrivers/net/ethernet/mellanox/mlx5/core/en/ptp.c:288:\t\t\tbusy |= mlx5e_poll_tx_cq(\u0026c-\u003eptpsq[i].txqsq.cq, budget);\ndrivers/net/ethernet/mellanox/mlx5/core/en/ptp.c-289-\t\t\tbusy |= mlx5e_ptp_poll_ts_cq(\u0026c-\u003eptpsq[i].ts_cq, budget);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en/txrx.h=113=netdev_tx_t mlx5e_xmit(struct sk_buff *skb, struct net_device *dev);\ndrivers/net/ethernet/mellanox/mlx5/core/en/txrx.h:114:bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget);\ndrivers/net/ethernet/mellanox/mlx5/core/en/txrx.h-115-void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_tx.c=756=void mlx5e_txqsq_wake(struct mlx5e_txqsq *sq)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_tx.c-766-\ndrivers/net/ethernet/mellanox/mlx5/core/en_tx.c:767:bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)\ndrivers/net/ethernet/mellanox/mlx5/core/en_tx.c-768-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_txrx.c=124=int mlx5e_napi_poll(struct napi_struct *napi, int budget)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_txrx.c-150-\tfor (i = 0; i \u003c c-\u003enum_tc; i++)\ndrivers/net/ethernet/mellanox/mlx5/core/en_txrx.c:151:\t\tbusy |= mlx5e_poll_tx_cq(\u0026c-\u003esq[i].cq, budget);\ndrivers/net/ethernet/mellanox/mlx5/core/en_txrx.c-152-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_txrx.c-160-\t\t\tif (sq)\ndrivers/net/ethernet/mellanox/mlx5/core/en_txrx.c:161:\t\t\t\tbusy |= mlx5e_poll_tx_cq(\u0026sq-\u003ecq, budget);\ndrivers/net/ethernet/mellanox/mlx5/core/en_txrx.c-162-\t\t}\n"
}
5/2 2026/07/03 01:50 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 6112
							output: 38
							thoughts: 379

Thoughts: 
**Mlx5 Driver Reachability Assessment**

Okay, so I'm looking at this mlx5 driver, specifically for Mellanox ConnectX-4/5/6/7 cards. My initial thought is, can syzkaller even *reach* this thing? Obviously, syzkaller doesn't have physical Mellanox hardware, so that's a non-starter. I quickly consider a software emulation - is there something for mlx5? No, that's not right. Hmm, then I recall syzkaller *can* fuzz drivers that can be instantiated through things like netlink, but mlx5 is a PCI driver, so that probably rules it out.

Then I think about `syz_mount_image` or USB fuzzing, but again, mlx5 is PCI. Okay, is there a PCI fuzzer *in* syzkaller? Ah, yes, there is, through vfio/pci. However, my experience is that this is usually pretty limited, and typically doesn't get deep into network data paths unless it's been specifically configured.

Alright, what about those instructions? I reread them: "Return WorthFuzzing=false if the patch only contains: - Code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware". So, the key is QEMU. Can I reach mlx5 in QEMU?

I know QEMU doesn't directly *emulate* mlx5. I quickly double check, just to be sure... no, QEMU doesn't have an mlx5 emulation. Wait, *does* QEMU emulate *any* Mellanox hardware? No, that's not right either. I see e1000, e1000e, rtl8139, pcnet, ne2k_pci, vmxnet3, virtio-net, igb, tulip. Okay, that's definitely not what I'm looking for. So I think I need to dig deeper. I'll need to research if there is *any* way to reach mlx5, using a different angle.

6/2 2026/07/03 01:51 tool grepper
0m Error: 
no matches

Args: 
{
  "Expression": "mlx5",
  "PathPrefix": "drivers/net/ethernet/mellanox/mlx5/Kconfig"
}

Results: 
{
  "error": "no matches"
}
7/2 2026/07/03 01:51 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 7012
							output: 35
							thoughts: 42

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

**Navigating the Mellanox Kconfig Landscape**

Right, so I'm diving into the Mellanox Ethernet driver configuration. I need to figure out where the Kconfig file for this thing lives. My initial thought is it's likely under `drivers/net/ethernet/mellanox/Kconfig`, that's the obvious top-level location. But, with Mellanox, you never know... they often have some pretty deep layers, particularly with the mlx5 architecture. So, I need to keep in mind that it *could* be tucked away deeper, specifically within `drivers/net/ethernet/mellanox/mlx5/core/Kconfig`. That location would be for the core mlx5 functionality. I need to check both before making a definitive choice or making assumptions. It depends on what section I am targeting within the overall driver. Alright, let's go check those locations.

8/2 2026/07/03 01:51 tool grepper
0m Args: 
{
  "Expression": "config MLX5",
  "PathPrefix": "drivers/net/ethernet/mellanox/"
}

Results: 
{
  "Output": "drivers/net/ethernet/mellanox/mlx5/core/Kconfig-5-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:6:config MLX5_CORE\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-7-\ttristate \"Mellanox 5th generation network adapters (ConnectX series) core driver\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-18-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:19:config MLX5_FPGA\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-20-\tbool \"Mellanox Technologies Innova support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-28-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:29:config MLX5_CORE_EN\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-30-\tbool \"Mellanox 5th generation network adapters (ConnectX series) Ethernet support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-37-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:38:config MLX5_EN_ARFS\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-39-\tbool \"Mellanox MLX5 ethernet accelerated receive flow steering (ARFS) support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-45-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:46:config MLX5_EN_RXNFC\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-47-\tbool \"Mellanox MLX5 ethernet rx nfc flow steering support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-55-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:56:config MLX5_MPFS\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-57-\tbool \"Mellanox Technologies MLX5 MPFS support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-65-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:66:config MLX5_ESWITCH\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-67-\tbool \"Mellanox Technologies MLX5 SRIOV E-Switch support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-76-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:77:config MLX5_BRIDGE\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-78-\tbool\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-86-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:87:config MLX5_CLS_ACT\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-88-\tbool \"MLX5 TC classifier action support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-101-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:102:config MLX5_TC_CT\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-103-\tbool \"MLX5 TC connection tracking offload support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-111-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:112:config MLX5_TC_SAMPLE\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-113-\tbool \"MLX5 TC sample offload support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-124-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:125:config MLX5_CORE_EN_DCB\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-126-\tbool \"Data Center Bridging (DCB) Support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-136-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:137:config MLX5_CORE_IPOIB\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-138-\tbool \"Mellanox 5th generation network adapters (connectX series) IPoIB offloads support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-142-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:143:config MLX5_MACSEC\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-144-\tbool \"Connect-X support for MACSec offload\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-150-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:151:config MLX5_EN_IPSEC\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-152-\tbool \"Mellanox Technologies IPsec Connect-X support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-158-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:159:config MLX5_EN_TLS\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-160-\tbool \"Mellanox Technologies TLS Connect-X support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-166-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:167:config MLX5_SW_STEERING\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-168-\tbool \"Mellanox Technologies software-managed steering\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-174-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:175:config MLX5_HW_STEERING\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-176-\tbool \"Mellanox Technologies hardware-managed steering\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-184-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:185:config MLX5_SF\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-186-\tbool \"Mellanox Technologies subfunction device support using auxiliary device\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-192-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:193:config MLX5_SF_MANAGER\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-194-\tbool\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-202-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:203:config MLX5_DPLL\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-204-\ttristate \"Mellanox 5th generation network adapters (ConnectX series) DPLL support\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-209-\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:210:config MLX5_EN_PSP\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-211-\tbool \"Mellanox Technologies support for PSP cryptography-offload acceleration\"\n"
}
9/2 2026/07/03 01:51 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 9407
							output: 35
							thoughts: 100

Thoughts: 
**Investigating the Reachability of Mellanox Code in a Syzkaller Context**

Okay, hold on a second. Syzkaller, as far as I know, doesn't typically have Mellanox hardware as a target. That's a key roadblock. My initial thought is, how can I even *trigger* this code in a virtualized environment, given that immediate hardware access is out?

Alright, time to pivot. Is there *any* kind of virtual device emulating Mellanox functionality I can leverage? I remember seeing something related to `vdpa/mlx5`, but isn't that a vDPA implementation? And doesn't vDPA *require* underlying real hardware (actual mlx5 hardware!) to function as the backing store?

Let's confirm that hypothesis. I need to dive into the kernel config files for more definitive information. Let me check `drivers/vdpa/mlx5/Kconfig`. That should clear things up. I need to understand if there is a virtual driver in there, or if this is hardware-dependent.

10/2 2026/07/03 01:51 tool grepper
0m Error: 
no matches

Args: 
{
  "Expression": "config MLX5_VDPA",
  "PathPrefix": "drivers/vdpa/mlx5/"
}

Results: 
{
  "error": "no matches"
}
11/2 2026/07/03 01:51 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 9782
							output: 25
							thoughts: 19

Thoughts: 
Here's my thought process, summarized as you requested:

**Investigating a Potential Driver Path**

Okay, hold on a second. I have a hunch, a possible path to investigate regarding a driver. It *feels* like the `drivers/vdpa/mlx5` directory might actually exist. I can't quite remember off the top of my head, so the next logical step is to confirm this suspicion. I need to check and verify if this driver path is real before I go any further down this particular line of reasoning. Time to look.

12/2 2026/07/03 01:51 tool codesearch-dir-index
0m Args: 
{
  "Dir": "drivers/vdpa/mlx5"
}

Results: 
{
  "Files": null,
  "Subdirs": [
    "core",
    "net"
  ]
}
13/2 2026/07/03 01:51 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 9964
							output: 40
							thoughts: 620

Thoughts: 
**WorthFuzzing=false: mlx5 and Virtualized Environments**

Okay, so I've got this patch, and I need to determine if it's worth fuzzing. The patch touches mlx5, which is a network device driver. I know mlx5 is tied to specific hardware, right? No software emulation within the kernel, making it a physical device driver.

The syzkaller PCI fuzzer is the key, but I need to consider that "WorthFuzzing=false" scenario: if the code paths are unreachable in a virtualized environment. Can the PCI fuzzer reach it? It *can* fuzz PCI devices. It *can* interact using syz_pci_device_add and similar, but generally, that's pretty shallow. It does PCI config space and MMIO reads/writes, but getting into any real functionality? That's the challenge.

Let's think about `mlx5e_poll_tx_cq`. Reaching *that* requires setting up a netdev, bringing it up, triggering TX... which then requires a hardware to work. DMA, interrupts... that's a *lot* for the fuzzer to perfectly emulate. It can't perfectly emulate hardware behavior, so that's not likely to work. `ndo_start_xmit` won't directly trigger `mlx5e_poll_tx_cq` because it's called from NAPI poll.

Essentially, *unless* the PCI fuzzer can flawlessly emulate the hardware - and let's face it, that's not happening for a complex driver like mlx5 - then I can't reach it. There's no `netdevsim`-like thing for mlx5, nothing that would provide a software representation.

So, I'm stuck with a physical hardware driver, no software emulation. Given the prompt's criteria, this code is *impossible* to reach in virtualized environments. Therefore, *WorthFuzzing=false.* Just need to confirm there isn't any emulation anywhere... just to be safe.

14/2 2026/07/03 01:51 tool grepper
0m Args: 
{
  "Expression": "mlx5_core",
  "PathPrefix": "drivers/net/ethernet/mellanox/mlx5/core/"
}

Results: 
{
  "Output": "\nFull output is too long, showing 500 out of 19067 lines.\nUse more precise expression if possible.\n\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig=19=config MLX5_FPGA\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-25-\t  and an FPGA chip on one board. If you select this option, the\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig:26:\t  mlx5_core driver will include the Innova FPGA core and allow building\ndrivers/net/ethernet/mellanox/mlx5/core/Kconfig-27-\t  sandbox-specific client drivers.\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile=7=subdir-ccflags-y += -I$(src)\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-8-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:9:obj-$(CONFIG_MLX5_CORE) += mlx5_core.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-10-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-13-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:14:mlx5_core-y :=\tmain.o cmd.o debugfs.o fw.o eq.o uar.o pagealloc.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-15-\t\thealth.o mcg.o cq.o alloc.o port.o mr.o pd.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-25-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:26:mlx5_core-$(CONFIG_MLX5_CORE_EN) += en/rqt.o en/tir.o en/rss.o en/rx_res.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-27-\t\ten/channels.o en_main.o en_common.o en_fs.o en_ethtool.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-37-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:38:mlx5_core-$(CONFIG_MLX5_EN_ARFS)     += en_arfs.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:39:mlx5_core-$(CONFIG_MLX5_EN_RXNFC)    += en_fs_ethtool.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:40:mlx5_core-$(CONFIG_MLX5_CORE_EN_DCB) += en_dcbnl.o en/port_buffer.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:41:mlx5_core-$(CONFIG_PCI_HYPERV_INTERFACE) += en/hv_vhca_stats.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:42:mlx5_core-$(CONFIG_MLX5_ESWITCH)     += lag/mp.o lag/port_sel.o lib/geneve.o lib/port_tun.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-43-\t\t\t\t\ten_rep.o en/rep/bond.o en/mod_hdr.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-44-\t\t\t\t\ten/mapping.o lag/mpesw.o lag/shared_fdb.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:45:mlx5_core-$(CONFIG_MLX5_CLS_ACT)     += en_tc.o en/rep/tc.o en/rep/neigh.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-46-\t\t\t\t\tlib/fs_chains.o en/tc_tun.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-52-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:53:mlx5_core-$(CONFIG_MLX5_CLS_ACT)     += en/tc/act/act.o en/tc/act/drop.o en/tc/act/trap.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-54-\t\t\t\t\ten/tc/act/accept.o en/tc/act/mark.o en/tc/act/goto.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile=61=ifneq ($(CONFIG_MLX5_TC_CT),)\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:62:\tmlx5_core-y\t\t\t     += en/tc_ct.o en/tc/ct_fs_dmfs.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:63:\tmlx5_core-$(CONFIG_MLX5_SW_STEERING) += en/tc/ct_fs_smfs.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:64:\tmlx5_core-$(CONFIG_MLX5_HW_STEERING) += en/tc/ct_fs_hmfs.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-65-endif\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-66-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:67:mlx5_core-$(CONFIG_MLX5_TC_SAMPLE)   += en/tc/sample.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-68-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-71-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:72:mlx5_core-$(CONFIG_MLX5_ESWITCH)   += eswitch.o eswitch_offloads.o eswitch_offloads_termtbl.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-73-\t\t\t\t      ecpf.o rdma.o esw/legacy.o esw/adj_vport.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-75-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:76:mlx5_core-$(CONFIG_MLX5_ESWITCH)   += esw/acl/helper.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-77-\t\t\t\t      esw/acl/egress_lgcy.o esw/acl/egress_ofld.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile=80=ifneq ($(CONFIG_MLX5_EN_IPSEC),)\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:81:\tmlx5_core-$(CONFIG_MLX5_ESWITCH)   += esw/ipsec_fs.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-82-endif\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-83-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:84:mlx5_core-$(CONFIG_MLX5_BRIDGE)    += esw/bridge.o esw/bridge_mcast.o esw/bridge_debugfs.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-85-\t\t\t\t      en/rep/bridge.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-86-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:87:mlx5_core-$(CONFIG_HWMON)          += hwmon.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:88:mlx5_core-$(CONFIG_MLX5_MPFS)      += lib/mpfs.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-89-ifneq ($(CONFIG_VXLAN),)\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:90:\tmlx5_core-y\t\t   += lib/vxlan.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-91-endif\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:92:mlx5_core-$(CONFIG_PTP_1588_CLOCK) += lib/clock.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:93:mlx5_core-$(CONFIG_PCI_HYPERV_INTERFACE) += lib/hv.o lib/hv_vhca.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-94-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-97-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:98:mlx5_core-$(CONFIG_MLX5_CORE_IPOIB) += ipoib/ipoib.o ipoib/ethtool.o ipoib/ipoib_vlan.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-99-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-102-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:103:mlx5_core-$(CONFIG_MLX5_FPGA) += fpga/cmd.o fpga/core.o fpga/conn.o fpga/sdk.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-104-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:105:mlx5_core-$(CONFIG_MLX5_MACSEC) += en_accel/macsec.o lib/macsec_fs.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-106-\t\t\t\t      en_accel/macsec_stats.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-107-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:108:mlx5_core-$(CONFIG_MLX5_EN_IPSEC) += en_accel/ipsec.o en_accel/ipsec_rxtx.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-109-\t\t\t\t     en_accel/ipsec_stats.o en_accel/ipsec_fs.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-111-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:112:mlx5_core-$(CONFIG_MLX5_EN_TLS) += en_accel/ktls_stats.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-113-\t\t\t\t   en_accel/fs_tcp.o en_accel/ktls.o en_accel/ktls_txrx.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-115-\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:116:mlx5_core-$(CONFIG_MLX5_EN_PSP) += en_accel/psp.o en_accel/psp_rxtx.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-117-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-120-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:121:mlx5_core-$(CONFIG_MLX5_SW_STEERING) += steering/sws/dr_domain.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-122-\t\t\t\t\tsteering/sws/dr_table.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-145-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:146:mlx5_core-$(CONFIG_MLX5_HW_STEERING) += steering/hws/cmd.o \\\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-147-\t\t\t\t\tsteering/hws/context.o \\\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-167-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:168:mlx5_core-$(CONFIG_MLX5_SF) += sf/vhca_event.o sf/dev/dev.o sf/dev/driver.o irq_affinity.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-169-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-172-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:173:mlx5_core-$(CONFIG_MLX5_SF_MANAGER) += sf/cmd.o sf/hw_table.o sf/devlink.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-174-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-177-#\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile:178:mlx5_core-$(CONFIG_PCIE_TPH) += lib/st.o\ndrivers/net/ethernet/mellanox/mlx5/core/Makefile-179-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-44-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:45:#include \"mlx5_core.h\"\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-46-\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=58=struct mlx5_dma_pool {\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-61-\tstruct list_head page_list;\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:62:\tstruct mlx5_core_dev *dev;\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-63-\tint node;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=79=struct mlx5_dma_pool_stats {\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-89-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:90:static void *mlx5_dma_zalloc_coherent_node(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-91-\t\t\t\t\t   size_t size, dma_addr_t *dma_handle,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-93-{\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:94:\tstruct device *device = mlx5_core_dma_dev(dev);\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-95-\tstruct mlx5_priv *priv = \u0026dev-\u003epriv;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=109=static void mlx5_dma_pool_destroy(struct mlx5_dma_pool *pool)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-114-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:115:static struct mlx5_dma_pool *mlx5_dma_pool_create(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-116-\t\t\t\t\t\t  int node, u8 block_shift)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=133=mlx5_dma_pool_page_alloc(struct mlx5_dma_pool *pool)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-162-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:163:static void mlx5_dma_pool_page_free(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-164-\t\t\t\t    struct mlx5_dma_pool_page *page)\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-165-{\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:166:\tdma_free_coherent(mlx5_core_dma_dev(dev), PAGE_SIZE, page-\u003ebuf,\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-167-\t\t\t  page-\u003edma);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=283=static struct mlx5_frag_buf_node_pools *\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:284:mlx5_frag_buf_node_pools_create(struct mlx5_core_dev *dev, int node)\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-285-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=307=mlx5_frag_buf_dma_pools_debugfs_show(struct seq_file *file, void *priv)\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-308-{\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:309:\tstruct mlx5_core_dev *dev = file-\u003eprivate;\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-310-\tint node;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=336=DEFINE_SHOW_ATTRIBUTE(mlx5_frag_buf_dma_pools_debugfs);\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-337-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:338:void mlx5_frag_buf_pools_cleanup(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-339-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-358-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:359:int mlx5_frag_buf_pools_init(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-360-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-387-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:388:int mlx5_frag_buf_alloc_node(struct mlx5_core_dev *dev, int size,\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-389-\t\t\t     struct mlx5_frag_buf *buf, int node)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=425=EXPORT_SYMBOL_GPL(mlx5_frag_buf_alloc_node);\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-426-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:427:void mlx5_frag_buf_free(struct mlx5_core_dev *dev, struct mlx5_frag_buf *buf)\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-428-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=445=EXPORT_SYMBOL_GPL(mlx5_frag_buf_free);\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-446-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:447:static struct mlx5_db_pgdir *mlx5_alloc_db_pgdir(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-448-\t\t\t\t\t\t int node)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=476=static int mlx5_alloc_db_from_pgdir(struct mlx5_db_pgdir *pgdir,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-500-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:501:int mlx5_db_alloc_node(struct mlx5_core_dev *dev, struct mlx5_db *db, int node)\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-502-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c=528=EXPORT_SYMBOL_GPL(mlx5_db_alloc_node);\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-529-\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:530:void mlx5_db_free(struct mlx5_core_dev *dev, struct mlx5_db *db)\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-531-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-538-\tif (bitmap_full(db-\u003eu.pgdir-\u003ebitmap, db_per_page)) {\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c:539:\t\tdma_free_coherent(mlx5_core_dma_dev(dev), PAGE_SIZE,\ndrivers/net/ethernet/mellanox/mlx5/core/alloc.c-540-\t\t\t\t  db-\u003eu.pgdir-\u003edb_page, db-\u003eu.pgdir-\u003edb_dma);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-43-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:44:#include \"mlx5_core.h\"\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-45-#include \"lib/eq.h\"\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=283=static void poll_timeout(struct mlx5_cmd_work_ent *ent)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-284-{\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:285:\tstruct mlx5_core_dev *dev = container_of(ent-\u003ecmd, struct mlx5_core_dev, cmd);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-286-\tu64 cmd_to_ms = mlx5_tout_ms(dev, CMD);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=331=static void dump_buf(void *buf, int size, int data_only, int offset, int idx)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-346-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:347:static int mlx5_internal_err_ret_value(struct mlx5_core_dev *dev, u16 op,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-348-\t\t\t\t       u32 *synd, u8 *status)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-546-\tdefault:\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:547:\t\tmlx5_core_err(dev, \"Unknown FW command (%d)\\n\", op);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-548-\t\treturn -EINVAL;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=793=static int cmd_status_to_err(u8 status)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-816-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:817:void mlx5_cmd_out_err(struct mlx5_core_dev *dev, u16 opcode, u16 op_mod, void *out)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-818-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-821-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:822:\tmlx5_core_err_rl(dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-823-\t\t\t \"%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x), err(%d)\\n\",\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=827=EXPORT_SYMBOL(mlx5_cmd_out_err);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-828-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:829:static void cmd_status_print(struct mlx5_core_dev *dev, void *in, void *out)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-830-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-844-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:845:int mlx5_cmd_check(struct mlx5_core_dev *dev, int err, void *in, void *out)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-846-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=872=EXPORT_SYMBOL(mlx5_cmd_check);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-873-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:874:static void dump_command(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-875-\t\t\t struct mlx5_cmd_work_ent *ent, int input)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-885-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:886:\tmlx5_core_dbg(dev, \"cmd[%d]: start dump\\n\", ent-\u003eidx);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:887:\tdata_only = !!(mlx5_core_debug_mask \u0026 (1 \u003c\u003c MLX5_CMD_DATA));\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-888-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-889-\tif (data_only)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:890:\t\tmlx5_core_dbg_mask(dev, 1 \u003c\u003c MLX5_CMD_DATA,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-891-\t\t\t\t   \"cmd[%d]: dump command data %s(0x%x) %s\\n\",\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-894-\telse\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:895:\t\tmlx5_core_dbg(dev, \"cmd[%d]: dump command %s(0x%x) %s\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-896-\t\t\t      ent-\u003eidx, mlx5_command_str(op), op,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-917-\t\t} else {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:918:\t\t\tmlx5_core_dbg(dev, \"cmd[%d]: command block:\\n\", ent-\u003eidx);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-919-\t\t\tdump_buf(next-\u003ebuf, sizeof(struct mlx5_cmd_prot_block), 0, offset,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-928-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:929:\tmlx5_core_dbg(dev, \"cmd[%d]: end dump\\n\", ent-\u003eidx);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-930-}\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-931-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:932:static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool forced);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-933-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=934=static void cb_timeout_handler(struct work_struct *work)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-939-\t\t\t\t\t\t     cb_timeout_work);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:940:\tstruct mlx5_core_dev *dev = container_of(ent-\u003ecmd, struct mlx5_core_dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-941-\t\t\t\t\t\t cmd);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-946-\tif (!test_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, \u0026ent-\u003estate)) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:947:\t\tmlx5_core_warn(dev, \"cmd[%d]: %s(0x%x) Async, recovered after timeout\\n\", ent-\u003eidx,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-948-\t\t\t       mlx5_command_str(ent-\u003eop), ent-\u003eop);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-952-\tent-\u003eret = -ETIMEDOUT;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:953:\tmlx5_core_warn(dev, \"cmd[%d]: %s(0x%x) Async, timeout. Will cause a leak of a command resource\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-954-\t\t       ent-\u003eidx, mlx5_command_str(ent-\u003eop), ent-\u003eop);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-960-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:961:static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:962:static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-963-\t\t\t      struct mlx5_cmd_msg *msg);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=965=static bool opcode_allowed(struct mlx5_cmd *cmd, u16 opcode)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-972-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:973:bool mlx5_cmd_is_down(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-974-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=980=static void cmd_work_handler(struct work_struct *work)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-985-\tstruct mlx5_cmd_layout *lay;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:986:\tstruct mlx5_core_dev *dev;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-987-\tunsigned long timeout;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-993-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:994:\tdev = container_of(cmd, struct mlx5_core_dev, cmd);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-995-\ttimeout = msecs_to_jiffies(mlx5_tout_ms(dev, CMD));\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-998-\t\tif (down_timeout(\u0026cmd-\u003evars.sem, timeout)) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:999:\t\t\tmlx5_core_warn(dev, \"%s(0x%x) timed out while waiting for a slot.\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1000-\t\t\t\t       mlx5_command_str(ent-\u003eop), ent-\u003eop);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1015-\t\tif (alloc_ret \u003c 0) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1016:\t\t\tmlx5_core_err_rl(dev, \"failed to allocate command entry\\n\");\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1017-\t\t\tif (ent-\u003ecallback) {\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1072-\t/* ring doorbell after the descriptor is valid */\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1073:\tmlx5_core_dbg(dev, \"writing 0x%x to command doorbell\\n\", 1 \u003c\u003c ent-\u003eidx);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1074-\twmb();\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1140=enum {\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1143-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1144:static void wait_func_handle_exec_timeout(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1145-\t\t\t\t\t  struct mlx5_cmd_work_ent *ent)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1156-\tif (wait_for_completion_timeout(\u0026ent-\u003edone, timeout)) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1157:\t\tmlx5_core_warn(dev, \"cmd[%d]: %s(0x%x) recovered after timeout\\n\", ent-\u003eidx,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1158-\t\t\t       mlx5_command_str(ent-\u003eop), ent-\u003eop);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1161-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1162:\tmlx5_core_warn(dev, \"cmd[%d]: %s(0x%x) No done completion\\n\", ent-\u003eidx,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1163-\t\t       mlx5_command_str(ent-\u003eop), ent-\u003eop);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1168-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1169:static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1170-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1191-\tif (err == -ETIMEDOUT) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1192:\t\tmlx5_core_warn(dev, \"%s(0x%x) timeout. Will cause a leak of a command resource\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1193-\t\t\t       mlx5_command_str(ent-\u003eop), ent-\u003eop);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1194-\t} else if (err == -ECANCELED) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1195:\t\tmlx5_core_warn(dev, \"%s(0x%x) canceled on out of queue timeout.\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1196-\t\t\t       mlx5_command_str(ent-\u003eop), ent-\u003eop);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1197-\t} else if (err == -EBUSY) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1198:\t\tmlx5_core_warn(dev, \"%s(0x%x) timeout while waiting for command semaphore.\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1199-\t\t\t       mlx5_command_str(ent-\u003eop), ent-\u003eop);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1200-\t}\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1201:\tmlx5_core_dbg(dev, \"err %d, delivery status %s(%d)\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1202-\t\t      err, deliv_status_to_str(ent-\u003estatus), ent-\u003estatus);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1215- */\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1216:static bool mlx5_cmd_all_stalled(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1217-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1258- */\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1259:static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1260-\t\t\t   struct mlx5_cmd_msg *out, void *uout, int uout_size,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1275-\tif (!page_queue \u0026\u0026 mlx5_cmd_all_stalled(dev)) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1276:\t\tmlx5_core_err_rl(dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1277-\t\t\t\t \"All CMD slots are stalled, aborting command\\n\");\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1306-\t} else if (!queue_work(cmd-\u003ewq, \u0026ent-\u003ework)) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1307:\t\tmlx5_core_warn(dev, \"failed to queue work\\n\");\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1308-\t\terr = -EALREADY;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1326-\t}\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1327:\tmlx5_core_dbg_mask(dev, 1 \u003c\u003c MLX5_CMD_TIME,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1328-\t\t\t   \"fw exec time for %s is %lld nsec\\n\",\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1337=static ssize_t dbg_write(struct file *filp, const char __user *buf,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1339-{\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1340:\tstruct mlx5_core_dev *dev = filp-\u003eprivate_data;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1341-\tstruct mlx5_cmd_debug *dbg = \u0026dev-\u003ecmd.dbg;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1404=static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1436-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1437:static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1438-\t\t\t\t\t      gfp_t flags)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1448-\tif (!mailbox-\u003ebuf) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1449:\t\tmlx5_core_dbg(dev, \"failed allocation\\n\");\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1450-\t\tkfree(mailbox);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1457-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1458:static void free_cmd_box(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1459-\t\t\t struct mlx5_cmd_mailbox *mailbox)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1464-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1465:static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1466-\t\t\t\t\t       gfp_t flags, int size,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1485-\t\tif (IS_ERR(tmp)) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1486:\t\t\tmlx5_core_warn(dev, \"failed allocating block\\n\");\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1487-\t\t\terr = PTR_ERR(tmp);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1511-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1512:static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1513-\t\t\t      struct mlx5_cmd_msg *msg)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1526=static ssize_t data_write(struct file *filp, const char __user *buf,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1528-{\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1529:\tstruct mlx5_core_dev *dev = filp-\u003eprivate_data;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1530-\tstruct mlx5_cmd_debug *dbg = \u0026dev-\u003ecmd.dbg;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1550=static ssize_t data_read(struct file *filp, char __user *buf, size_t count,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1552-{\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1553:\tstruct mlx5_core_dev *dev = filp-\u003eprivate_data;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1554-\tstruct mlx5_cmd_debug *dbg = \u0026dev-\u003ecmd.dbg;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1570=static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1572-{\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1573:\tstruct mlx5_core_dev *dev = filp-\u003eprivate_data;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1574-\tstruct mlx5_cmd_debug *dbg = \u0026dev-\u003ecmd.dbg;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1585=static ssize_t outlen_write(struct file *filp, const char __user *buf,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1587-{\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1588:\tstruct mlx5_core_dev *dev = filp-\u003eprivate_data;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1589-\tstruct mlx5_cmd_debug *dbg = \u0026dev-\u003ecmd.dbg;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1621=static const struct file_operations olfops = {\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1627-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1628:static void set_wqname(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1629-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1635-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1636:static void clean_debug_files(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1637-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1645-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1646:static void create_debugfs_files(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1647-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1658-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1659:void mlx5_cmd_allowed_opcode(struct mlx5_core_dev *dev, u16 opcode)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1660-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1674-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1675:static void mlx5_cmd_change_mod(struct mlx5_core_dev *dev, int mode)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1676-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1691=static int cmd_comp_notifier(struct notifier_block *nb,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1693-{\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1694:\tstruct mlx5_core_dev *dev;\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1695-\tstruct mlx5_cmd *cmd;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1698-\tcmd = mlx5_nb_cof(nb, struct mlx5_cmd, nb);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1699:\tdev = container_of(cmd, struct mlx5_core_dev, cmd);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1700-\teqe = data;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1708-}\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1709:void mlx5_cmd_use_events(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1710-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1715-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1716:void mlx5_cmd_use_polling(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1717-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1721-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1722:static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1723-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1734-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1735:static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool forced)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1736-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1765-\t\t\t\tif (!forced) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1766:\t\t\t\t\tmlx5_core_err(dev, \"Command completion arrived after timeout (entry idx = %d).\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1767-\t\t\t\t\t\t      ent-\u003eidx);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1793-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1794:\t\t\t\tmlx5_core_dbg(dev, \"command completed. ret 0x%x, delivery status %s(0x%x)\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1795-\t\t\t\t\t      ent-\u003eret, deliv_status_to_str(ent-\u003estatus), ent-\u003estatus);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1838-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1839:static void mlx5_cmd_trigger_completions(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1840-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1863-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1864:\tmlx5_core_dbg(dev, \"vector 0x%llx\\n\", vector);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1865-\tmlx5_cmd_comp_handler(dev, vector, true);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1873-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1874:void mlx5_cmd_flush(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1875-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1896-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1897:static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1898-\t\t\t\t      gfp_t gfp)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c=1935=static int is_manage_pages(void *in)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1939-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1940:static bool mlx5_has_privileged_uid(struct mlx5_core_dev *dev)\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1941-{\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1944-\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1945:static bool mlx5_cmd_is_privileged_uid(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1946-\t\t\t\t       u16 uid)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1954- */\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:1955:static int cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1956-\t\t    int out_size, mlx5_cmd_cbk_t callback, void *context,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-1999-\tif (err) {\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c:2000:\t\tmlx5_core_warn(dev, \"err %d\\n\", err);\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-2001-\t\tgoto out_in;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/cmd.c-2035-\n\n"
}
15/2 2026/07/03 01:51 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 26081
							output: 101
							thoughts: 749

Thoughts: 
**My Assessment of the MLX5 Patch's Fuzzing Potential**

Okay, let's break this down. First, `CONFIG_MLX5_CORE` – that's the core driver, the heart of the matter. My initial thought is, "Can syzkaller even touch this code?" I need to verify if syzkaller is actively fuzzing mlx5. I know it has a `syz_pci_device_add` call, which is a starting point for PCI device interaction, but it's not a guarantee to reach deep into network drivers unless there's dedicated support. 

Hold on, maybe the patch itself is just a functional change within the driver? I should re-read those instructions: "Return WorthFuzzing=false if the patch only contains... code paths that are impossible to reach in virtualized environments..."

Given that mlx5 is tied to physical hardware, Mellanox ConnectX specifically, and there's no native software emulation of it in QEMU or the kernel (unlike, say, a virtual USB gadget or mac80211_hwsim), the code paths addressed by this patch are definitively inaccessible in a virtualized fuzzing environment.

Let me just check for alternatives just in case... Is there a vDPA path? Ah, `vdpa/mlx5` *requires* the physical mlx5 device. What about netdevsim? No, it handles some offloads but doesn't actually use mlx5 code. Mock drivers? No dice.

Alright, back to the patch. It's modifying `drivers/net/ethernet/mellanox/mlx5/core/en_tx.c` and `en_stats.c`, specifically `mlx5e_poll_tx_cq`. This is unequivocally hardware-specific driver code, no ifs, ands, or buts. Since there's no software emulation, reaching this code in QEMU or similar environments is a dead end.

Thus, I'm setting `WorthFuzzing=false` and adding the following reasoning: "The patch modifies the Mellanox mlx5 ethernet driver (`mlx5e_poll_tx_cq`). This is a physical hardware driver for Mellanox ConnectX adapters and there is no software emulation available for it in QEMU or the kernel. Therefore, the modified code paths are impossible to reach in virtualized fuzzing environments."

But just to be absolutely certain, let's explore if syzkaller can blindly probe the driver.  It *might* be able to reach some code by using `syz_pci_device_add` and mapping memory plus responding to MMIO reads, however reaching `mlx5e_poll_tx_cq` needs a fully initialized device, netdev registration, bringing it up, and a TX interrupt. That's practically impossible for a blind fuzzer without specific emulation. Plus the instructions say: "Code paths that are impossible to reach in virtualized environments like GCE or QEMU, *even when utilizing software-emulated hardware*." So, my conclusion holds.

I'm calling `set-results` with `WorthFuzzing=false`.

16/2 2026/07/03 01:52 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mellanox mlx5 ethernet driver (mlx5e_poll_tx_cq). This is a physical hardware driver for Mellanox ConnectX adapters and there is no software emulation available for it in QEMU or the kernel. Therefore, the modified code paths are impossible to reach in virtualized fuzzing environments.",
  "WorthFuzzing": false
}

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mellanox mlx5 ethernet driver (mlx5e_poll_tx_cq). This is a physical hardware driver for Mellanox ConnectX adapters and there is no software emulation available for it in QEMU or the kernel. Therefore, the modified code paths are impossible to reach in virtualized fuzzing environments.",
  "WorthFuzzing": false
}
LLM Calls Summary:
Total Calls Total Tokens Avg Tokens Total Duration (Seconds) Avg Duration (Seconds)
Tool Calls Summary:
Total Calls Total Duration (Seconds) Avg Duration (Seconds)