AI Trajectory

null

{
  "EnableConfigs": [
    "NET_SCH_CAKE"
  ],
  "FocusSymbols": [
    "cake_configure_rates",
    "cake_reconfigure",
    "cake_change",
    "cake_init",
    "cake_mq_change"
  ],
  "Reasoning": "The patch modifies the rate configuration logic in the CAKE qdisc to avoid clearing tins when adjusting rates dynamically. This is a functional change in the network scheduler that affects packet scheduling state.",
  "WorthFuzzing": true
}

null

{
  "PatchDiff": "commit e09724cdad05935c7e32528257c0fa36981145cc\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Fri Jul 17 01:53:51 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/net/sched/sch_cake.c b/net/sched/sch_cake.c\nindex f78f8e95077667..845e1c017714a2 100644\n--- a/net/sched/sch_cake.c\n+++ b/net/sched/sch_cake.c\n@@ -2609,9 +2609,11 @@ static void cake_configure_rates(struct Qdisc *sch, u64 rate, bool rate_adjust)\n \t\tbreak;\n \t}\n \n-\tfor (c = qd-\u003etin_cnt; c \u003c CAKE_MAX_TINS; c++) {\n-\t\tcake_clear_tin(sch, c);\n-\t\tqd-\u003etins[c].cparams.mtu_time = qd-\u003etins[ft].cparams.mtu_time;\n+\tif (!rate_adjust) {\n+\t\tfor (c = qd-\u003etin_cnt; c \u003c CAKE_MAX_TINS; c++) {\n+\t\t\tcake_clear_tin(sch, c);\n+\t\t\tqd-\u003etins[c].cparams.mtu_time = qd-\u003etins[ft].cparams.mtu_time;\n+\t\t}\n \t}\n \n \tqd-\u003erate_ns   = qd-\u003etins[ft].tin_rate_ns;\n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": [
    "NET_SCH_CAKE"
  ],
  "FocusSymbols": [
    "cake_configure_rates",
    "cake_reconfigure",
    "cake_change",
    "cake_init",
    "cake_mq_change"
  ],
  "Reasoning": "The patch modifies the rate configuration logic in the CAKE qdisc to avoid clearing tins when adjusting rates dynamically. This is a functional change in the network scheduler that affects packet scheduling state.",
  "WorthFuzzing": true
}

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

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

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

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

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


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

For your convenience, here is the diff of the changes:
commit e09724cdad05935c7e32528257c0fa36981145cc
Author: syz-cluster <triage@syzkaller.com>
Date:   Fri Jul 17 01:53:51 2026 +0000

    syz-cluster: applied patch under review

diff --git a/net/sched/sch_cake.c b/net/sched/sch_cake.c
index f78f8e95077667..845e1c017714a2 100644
--- a/net/sched/sch_cake.c
+++ b/net/sched/sch_cake.c
@@ -2609,9 +2609,11 @@ static void cake_configure_rates(struct Qdisc *sch, u64 rate, bool rate_adjust)
 		break;
 	}
 
-	for (c = qd->tin_cnt; c < CAKE_MAX_TINS; c++) {
-		cake_clear_tin(sch, c);
-		qd->tins[c].cparams.mtu_time = qd->tins[ft].cparams.mtu_time;
+	if (!rate_adjust) {
+		for (c = qd->tin_cnt; c < CAKE_MAX_TINS; c++) {
+			cake_clear_tin(sch, c);
+			qd->tins[c].cparams.mtu_time = qd->tins[ft].cparams.mtu_time;
+		}
 	}
 
 	qd->rate_ns   = qd->tins[ft].tin_rate_ns;

gemini-3.1-pro-preview

null

null

							input: 1958
							output: 34
							thoughts: 80
						

Okay, let's break this down.

**Analyzing a CAKE Scheduler Patch**

Alright, so I'm looking at a patch that's specifically targeting `net/sched/sch_cake.c`, which is interesting. The core change seems to be within the `cake_configure_rates` function. The patch's introduction of an `if (!rate_adjust)` condition is what I'm particularly interested in, given my background. I know this function is responsible for adjusting the bandwidth rates and related configurations for the CAKE qdisc.

Specifically, it looks like this new conditional is gating a loop that's responsible for clearing out "tins" and setting `mtu_time`. Now, the "tins" concept, I'm already aware of, is how CAKE structures its traffic shaping, grouping things based on time. So, if `rate_adjust` is false, this means we're *not* adjusting the rate, and we enter this loop? Hmm, I'd need to dig deeper into the context of `rate_adjust` to see what scenarios that covers. I bet it has to do with how the qdisc is being configured or reconfigured. I need to understand what this conditional is trying to protect, and what scenarios it's accounting for. Perhaps, this change improves the reliability of the configuration, and prevents resetting of these values in the wrong scenarios. I'll need to go through the code, the commit message, and any related documentation to fully grasp the rationale here, and what potential implications there might be for overall CAKE performance and behavior.

{
  "Expression": "cake_configure_rates",
  "PathPrefix": "net/sched/sch_cake.c"
}

{
  "Output": "net/sched/sch_cake.c=387=static const u32 inv_sqrt_cache[REC_INV_SQRT_CACHE] = {\n--\nnet/sched/sch_cake.c-393-\nnet/sched/sch_cake.c:394:static void cake_configure_rates(struct Qdisc *sch, u64 rate, bool rate_adjust);\nnet/sched/sch_cake.c-395-\n--\nnet/sched/sch_cake.c=2007=static struct sk_buff *cake_dequeue(struct Qdisc *sch)\n--\nnet/sched/sch_cake.c-2046-\nnet/sched/sch_cake.c:2047:\t\tcake_configure_rates(sch, new_rate, true);\nnet/sched/sch_cake.c-2048-\t\tq-\u003elast_checked_active = now;\n--\nnet/sched/sch_cake.c=2550=static int cake_config_diffserv3(struct Qdisc *sch, u64 rate, u32 mtu)\n--\nnet/sched/sch_cake.c-2581-\nnet/sched/sch_cake.c:2582:static void cake_configure_rates(struct Qdisc *sch, u64 rate, bool rate_adjust)\nnet/sched/sch_cake.c-2583-{\n--\nnet/sched/sch_cake.c=2623=static void cake_reconfigure(struct Qdisc *sch)\n--\nnet/sched/sch_cake.c-2628-\nnet/sched/sch_cake.c:2629:\tcake_configure_rates(sch, qd-\u003econfig-\u003erate_bps, false);\nnet/sched/sch_cake.c-2630-\n"
}

gemini-3.1-pro-preview

null

null

							input: 2855
							output: 27
							thoughts: 102
						

**Analyzing the CAKE qdisc Rate Adjustment Patch**

Okay, so this patch is aimed squarely at how `cake_configure_rates` behaves within the CAKE qdisc. It's interesting how it's called from two different entry points: `cake_dequeue`, where `rate_adjust` is set to `true`, and `cake_reconfigure`, with `rate_adjust` set to `false`. The key difference is that when the `rate_adjust` flag is *true*, meaning we're probably responding to some dynamic change in the network conditions, we're going to *avoid* clearing the tins and resetting `mtu_time`. This is critical. Why? Because the `cake_dequeue` path, with the flag set to true, implies that we are processing a packet, and we don't want to clear the tins or reset mtu_time. This would negatively impact the qdisc.

Therefore, this patch is a definite functional adjustment to how CAKE manages its internal state during these rate adjustments. I wonder what the corresponding configuration options are for this specific behavior. It's time to dig into the config options for the CAKE qdisc.

{
  "Expression": "sch_cake",
  "PathPrefix": "net/sched/"
}

{
  "Output": "net/sched/Kconfig=288=config NET_SCH_CAKE\n--\nnet/sched/Kconfig-294-\t  To compile this driver as a module, choose M here: the module\nnet/sched/Kconfig:295:\t  will be called sch_cake.\nnet/sched/Kconfig-296-\n--\nnet/sched/Makefile=56=obj-$(CONFIG_NET_SCH_FQ_CODEL)\t+= sch_fq_codel.o\nnet/sched/Makefile:57:obj-$(CONFIG_NET_SCH_CAKE)\t+= sch_cake.o\nnet/sched/Makefile-58-obj-$(CONFIG_NET_SCH_FQ)\t+= sch_fq.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 3417
							output: 38
							thoughts: 198
						

**Fuzzing the CAKE Qdisc Configuration**

Okay, so the configuration option I need to target is `NET_SCH_CAKE`. This looks like a functional change within the network scheduler (qdisc) code, specifically, I'm focusing on the `cake_configure_rates` function. Given that, it's definitely worth spending some cycles fuzzing it.

The main symbols to focus my attention on are `cake_configure_rates`, `cake_dequeue`, and `cake_reconfigure`. Wait a minute, `cake_dequeue` is a hot path function, used for dequeuing packets from the qdisc... That's significant. Now I remember that `cake_configure_rates` is called both from `cake_dequeue` and from `cake_reconfigure`. Hmm, perhaps I should focus most of my energy on `cake_configure_rates` then, since it's reachable via the hot `cake_dequeue` path.

Let me just quickly confirm that `cake_configure_rates` itself isn't a hot path function. It's called from `cake_dequeue`, but only when `rate_adjust` is true, which presumably happens when the `new_rate` is different. Let's see... I'll need to check the code around line 2047 in `cake_dequeue` to get the full picture.

{
  "File": "net/sched/sch_cake.c",
  "FirstLine": 2030,
  "LineCount": 30
}

{
  "Contents": "2030:\t\t\tfor (ntx = 0; ntx \u003c dev-\u003enum_tx_queues; ntx++) {\n2031:\t\t\t\tother_sch = rcu_dereference(netdev_get_tx_queue(dev, ntx)-\u003eqdisc_sleeping);\n2032:\t\t\t\tother_priv = qdisc_priv(other_sch);\n2033:\t\n2034:\t\t\t\tif (other_priv == q)\n2035:\t\t\t\t\tcontinue;\n2036:\t\n2037:\t\t\t\tother_qlen = READ_ONCE(other_sch-\u003eq.qlen);\n2038:\t\t\t\tother_last_active = READ_ONCE(other_priv-\u003elast_active);\n2039:\t\n2040:\t\t\t\tif (other_qlen || other_last_active \u003e q-\u003elast_checked_active)\n2041:\t\t\t\t\tnum_active_qs++;\n2042:\t\t\t}\n2043:\t\n2044:\t\t\tif (num_active_qs \u003e 1)\n2045:\t\t\t\tnew_rate = div64_u64(q-\u003econfig-\u003erate_bps, num_active_qs);\n2046:\t\n2047:\t\t\tcake_configure_rates(sch, new_rate, true);\n2048:\t\t\tq-\u003elast_checked_active = now;\n2049:\t\t\tWRITE_ONCE(q-\u003eactive_queues, num_active_qs);\n2050:\t\t}\n2051:\t\n2052:\tbegin:\n2053:\t\tif (!sch-\u003eq.qlen)\n2054:\t\t\treturn NULL;\n2055:\t\n2056:\t\t/* global hard shaper */\n2057:\t\tif (ktime_after(q-\u003etime_next_packet, now) \u0026\u0026\n2058:\t\t    ktime_after(q-\u003efailsafe_next_packet, now)) {\n2059:\t\t\tu64 next = min(ktime_to_ns(q-\u003etime_next_packet),\n"
}

gemini-3.1-pro-preview

null

null

							input: 4467
							output: 38
							thoughts: 29
						

Okay, here's my interpretation of those thoughts, summarized from my perspective as an expert in this field:

**Debugging the Rate Configuration Process**

Alright, so it looks like `cake_configure_rates` is likely the key function that gets invoked whenever the traffic shaping rates need to be updated. My initial hunch is that it's either triggered by a regular timer, a scheduled task, or perhaps whenever the active queues within the system change. That makes sense, those are the typical events that would trigger a reconfiguration.

To confirm that, I should dig into how the system is reconfiguring its rates. That means the next logical step is to examine the `cake_reconfigure` function. That function will likely provide the overall control logic for actually making the changes, pulling in any updated parameters or settings, and calling other functions like `cake_configure_rates` when appropriate. I'll need to understand how the system decides *when* to reconfigure and *what* it's reconfiguring to understand this better.

{
  "File": "net/sched/sch_cake.c",
  "FirstLine": 2620,
  "LineCount": 30
}

{
  "Contents": "2620:\t\tqd-\u003erate_shft = qd-\u003etins[ft].tin_rate_shft;\n2621:\t}\n2622:\t\n2623:\tstatic void cake_reconfigure(struct Qdisc *sch)\n2624:\t{\n2625:\t\tstruct cake_sched_data *qd = qdisc_priv(sch);\n2626:\t\tstruct cake_sched_config *q = qd-\u003econfig;\n2627:\t\tu32 buffer_limit;\n2628:\t\n2629:\t\tcake_configure_rates(sch, qd-\u003econfig-\u003erate_bps, false);\n2630:\t\n2631:\t\tif (q-\u003ebuffer_config_limit) {\n2632:\t\t\tbuffer_limit = q-\u003ebuffer_config_limit;\n2633:\t\t} else if (q-\u003erate_bps) {\n2634:\t\t\tu64 t = q-\u003erate_bps * q-\u003einterval;\n2635:\t\n2636:\t\t\tdo_div(t, USEC_PER_SEC / 4);\n2637:\t\t\tbuffer_limit = max_t(u32, t, 4U \u003c\u003c 20);\n2638:\t\t} else {\n2639:\t\t\tbuffer_limit = ~0;\n2640:\t\t}\n2641:\t\n2642:\t\tsch-\u003eflags \u0026= ~TCQ_F_CAN_BYPASS;\n2643:\t\n2644:\t\tWRITE_ONCE(qd-\u003ebuffer_limit,\n2645:\t\t\t   min(buffer_limit,\n2646:\t\t\t       max(sch-\u003elimit * psched_mtu(qdisc_dev(sch)),\n2647:\t\t\t\t   q-\u003ebuffer_config_limit)));\n2648:\t}\n2649:\t\n"
}

gemini-3.1-pro-preview

null

null

							input: 5223
							output: 33
							thoughts: 35
						

Okay, here's my interpretation of those thoughts, framed as an expert's internal monologue:

**Analyzing the CAKE Queue Discipline Configuration**

Alright, let's see... so, `cake_reconfigure` is the key function here. It's triggered whenever the CAKE queue discipline itself is initially set up or, more importantly, *re*configured – meaning any subsequent changes to its parameters. That's good to know; it tells me exactly when I need to pay attention to its behavior.

My immediate follow-up thought is, which part of the code actually *calls* that function? And the logical candidate appears to be `cake_change`. Seems like that's the likely entry point. Understanding that relationship is crucial. If I'm troubleshooting, or optimizing CAKE, I need to know the calling sequence. Knowing the caller `cake_change` and its role will dictate how I best can observe the reconfiguration process, determine the inputs, and pinpoint the trigger for these crucial updates. I'll need to double check that assumption and verify, but it's a very reasonable starting point. Excellent, that's a good start.

{
  "Expression": "cake_reconfigure",
  "PathPrefix": "net/sched/sch_cake.c"
}

{
  "Output": "net/sched/sch_cake.c=1716=static u32 cake_classify(struct Qdisc *sch, struct cake_tin_data **t,\n--\nnet/sched/sch_cake.c-1753-\nnet/sched/sch_cake.c:1754:static void cake_reconfigure(struct Qdisc *sch);\nnet/sched/sch_cake.c-1755-\nnet/sched/sch_cake.c=1756=static s32 cake_enqueue(struct sk_buff *skb, struct Qdisc *sch,\n--\nnet/sched/sch_cake.c-1910-\t\t\t\tq-\u003econfig-\u003erate_bps = (q-\u003eavg_peak_bandwidth * 15) \u003e\u003e 4;\nnet/sched/sch_cake.c:1911:\t\t\t\tcake_reconfigure(sch);\nnet/sched/sch_cake.c-1912-\t\t\t}\n--\nnet/sched/sch_cake.c=2582=static void cake_configure_rates(struct Qdisc *sch, u64 rate, bool rate_adjust)\n--\nnet/sched/sch_cake.c-2622-\nnet/sched/sch_cake.c:2623:static void cake_reconfigure(struct Qdisc *sch)\nnet/sched/sch_cake.c-2624-{\n--\nnet/sched/sch_cake.c=2774=static int cake_change(struct Qdisc *sch, struct nlattr *opt,\n--\nnet/sched/sch_cake.c-2799-\t\tsch_tree_lock(sch);\nnet/sched/sch_cake.c:2800:\t\tcake_reconfigure(sch);\nnet/sched/sch_cake.c-2801-\t\tsch_tree_unlock(sch);\n--\nnet/sched/sch_cake.c=2832=static int cake_init(struct Qdisc *sch, struct nlattr *opt,\n--\nnet/sched/sch_cake.c-2890-\nnet/sched/sch_cake.c:2891:\tcake_reconfigure(sch);\nnet/sched/sch_cake.c-2892-\tqd-\u003eavg_peak_bandwidth = q-\u003erate_bps;\n--\nnet/sched/sch_cake.c=2901=static void cake_config_replace(struct Qdisc *sch, struct cake_sched_config *cfg)\n--\nnet/sched/sch_cake.c-2905-\tqd-\u003econfig = cfg;\nnet/sched/sch_cake.c:2906:\tcake_reconfigure(sch);\nnet/sched/sch_cake.c-2907-}\n--\nnet/sched/sch_cake.c=3302=static int cake_mq_change(struct Qdisc *sch, struct nlattr *opt,\n--\nnet/sched/sch_cake.c-3327-\t\t\tsch_tree_lock(chld);\nnet/sched/sch_cake.c:3328:\t\t\tcake_reconfigure(chld);\nnet/sched/sch_cake.c-3329-\t\t\tsch_tree_unlock(chld);\n"
}

gemini-3.1-pro-preview

null

null

							input: 6319
							output: 33
							thoughts: 485
						

**CAKE Qdisc Rate Configuration Patch Assessment**

Okay, so I've been looking at this CAKE qdisc patch and here's my breakdown. From what I can see, `cake_reconfigure` gets called from several places: `cake_change`, `cake_init`, `cake_config_replace`, `cake_mq_change`, and `cake_enqueue`. The core issue seems to be that `cake_configure_rates` was incorrectly clearing the tins, specifically when called from `cake_dequeue` with `rate_adjust=true`. This would lead to lost or corrupted state, so it makes sense why it's a bug. The proposed fix, which is the modification here, is only clearing the tins if `rate_adjust` is false, which seems correct from a functional perspective.

Given that this is a functional change affecting rate configuration, it's definitely worth fuzzing to ensure stability and correctness under various conditions. My initial thought was to focus the fuzzing on `cake_configure_rates`, `cake_reconfigure`, `cake_change`, `cake_init`, and `cake_mq_change`, as these seem to be the primary entry points and configuration points.

However, after a second look, I realize that `cake_configure_rates` is the only function that has been directly modified. This actually simplifies things a bit. I still need to target those configuration paths so I'm going to include the original set: `cake_change`, `cake_init`, and `cake_mq_change`. And, since `cake_configure_rates` is the heart of the issue, and called by `cake_reconfigure`, I'll include `cake_configure_rates` and `cake_reconfigure` as key focus points. I know `cake_dequeue` calls `cake_configure_rates` as well, but that's a hot path function which I want to avoid to make the testing a bit more targeted.

Regarding configuration, I'll need `NET_SCH_CAKE`. Let's double check to make sure there are no other dependencies. Nope, that's the only one.

Here's the summary:

*   **WorthFuzzing:** True
*   **EnableConfigs:** `["NET_SCH_CAKE"]`
*   **FocusSymbols:** `["cake_configure_rates", "cake_reconfigure", "cake_change", "cake_init", "cake_mq_change"]`
*   **Reasoning:** The patch is modifying the CAKE qdisc rate configuration logic. It fixes clearing the tins when dynamically adjusting rates, which is a functional change that affects network scheduling state and thus packet behavior. I'm focusing on the configuration paths that call into the modified function.

I am going to refine the `FocusSymbols` based on the direct change: `cake_configure_rates`. The others are there to trigger the relevant configuration paths. I need to avoid `cake_dequeue`, as it's too hot to focus on.

Let me check one last time for any other dependencies... nope. Done.

{
  "Expression": "config NET_SCH_CAKE",
  "PathPrefix": "net/sched/Kconfig"
}

{
  "Output": "net/sched/Kconfig=277=config NET_SCH_FQ_CODEL\n--\nnet/sched/Kconfig-287-\nnet/sched/Kconfig:288:config NET_SCH_CAKE\nnet/sched/Kconfig-289-\ttristate \"Common Applications Kept Enhanced (CAKE)\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 7585
							output: 34
							thoughts: 19
						

Here's a summary of my thought process, as requested:

**Diving into `net/sched/Kconfig`**

Okay, so I need to get a handle on how something in the networking scheduler is configured. I'm thinking I'll start by digging into the Kconfig file. Let's see...I'll focus on `net/sched/Kconfig` specifically. I recall that file being pretty central to a lot of the QoS and traffic shaping options. Now, where to begin? Hmm, let's look around line 288. That area usually holds declarations for core scheduler options. Hopefully, that will give me some context. It's time to open that file and get started. Let's get to it.

{
  "File": "net/sched/Kconfig",
  "FirstLine": 280,
  "LineCount": 20
}

{
  "Contents": " 280:\t\t  Say Y here if you want to use the FQ Controlled Delay (FQ_CODEL)\n 281:\t\t  packet scheduling algorithm.\n 282:\t\n 283:\t\t  To compile this driver as a module, choose M here: the module\n 284:\t\t  will be called sch_fq_codel.\n 285:\t\n 286:\t\t  If unsure, say N.\n 287:\t\n 288:\tconfig NET_SCH_CAKE\n 289:\t\ttristate \"Common Applications Kept Enhanced (CAKE)\"\n 290:\t\thelp\n 291:\t\t  Say Y here if you want to use the Common Applications Kept Enhanced\n 292:\t\t  (CAKE) queue management algorithm.\n 293:\t\n 294:\t\t  To compile this driver as a module, choose M here: the module\n 295:\t\t  will be called sch_cake.\n 296:\t\n 297:\t\t  If unsure, say N.\n 298:\t\n 299:\tconfig NET_SCH_FQ\n"
}

gemini-3.1-pro-preview

null

null

							input: 8089
							output: 110
							thoughts: 24
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Streamlining the Process**

Right, so we're looking at network scheduling, and the good news is, we don't need to bring in any heavy-duty dependencies for this particular operation. The standard `NET_SCH_CAKE` module should be perfectly adequate for what we need to achieve. That simplifies things immensely and keeps the codebase nice and clean.

Given that's settled, the next logical step is to call whatever function or method we've designated to set the results. Let's get those figures in place.

{
  "EnableConfigs": [
    "NET_SCH_CAKE"
  ],
  "FocusSymbols": [
    "cake_configure_rates",
    "cake_reconfigure",
    "cake_change",
    "cake_init",
    "cake_mq_change"
  ],
  "Reasoning": "The patch modifies the rate configuration logic in the CAKE qdisc to avoid clearing tins when adjusting rates dynamically. This is a functional change in the network scheduler that affects packet scheduling state.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "NET_SCH_CAKE"
  ],
  "FocusSymbols": [
    "cake_configure_rates",
    "cake_reconfigure",
    "cake_change",
    "cake_init",
    "cake_mq_change"
  ],
  "Reasoning": "The patch modifies the rate configuration logic in the CAKE qdisc to avoid clearing tins when adjusting rates dynamically. This is a functional change in the network scheduler that affects packet scheduling state.",
  "WorthFuzzing": true
}