| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/09/15 11:16 | flow | patch-triage |
4mArgs:null Results: {
"EnableConfigs": [
"BONDING",
"NET_CORE"
],
"FocusSymbols": [
"bond_3ad_xor_xmit",
"bond_3ad_xmit_fallback",
"bond_xmit_3ad_xor_slave_get",
"bond_3ad_slave_is_eligible",
"bond_start_xmit"
],
"KMSANReasoning": "The patch addresses transmit fallback in the bonding driver for 802.3ad mode when usable_slaves array has not caught up. It delays computing bond_xmit_hash() until count is checked and adds bond_3ad_xmit_fallback() to iterate over eligible slaves under bond-\u003emode_lock.\n\nAll local variables introduced or modified (e.g. selected, eligible, target, hash, count) are fully and explicitly initialized before use. The patch does not introduce any memory allocations, copy data to user space, or alter buffer bounds in a way that could lead to uninitialized memory exposure. Potential concerns with this patch (locking under mode_lock, RCU synchronization, NULL pointers) fall squarely under LOCKDEP and KASAN. Therefore, a dedicated KMSAN fuzzing session is not warranted.",
"NeedsKMSAN": false,
"Reasoning": "The patch modifies the transmit path of the Linux network bonding driver for 802.3ad and XOR modes (bond_3ad_xor_xmit and bond_xmit_3ad_xor_slave_get). It adds a fallback slave selection path (bond_3ad_xmit_fallback) that acquires bond-\u003emode_lock and iterates over slaves during packet transmission when the usable slave array is empty. This logic is easily reachable in standard virtualized environments via virtual network interfaces and warrants fuzzing for race conditions, deadlock/lockdep regressions, and null pointer dereferences.",
"WorthFuzzing": true
} |
| 1/1 | 2026/09/15 11:16 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 2f4b5c6964d2586f16c2dc9e152b8480d9cf6567\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Sep 15 11:16:48 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c\nindex a9bff7663eeca..2cf280bf134f2 100644\n--- a/drivers/net/bonding/bond_main.c\n+++ b/drivers/net/bonding/bond_main.c\n@@ -5233,11 +5233,11 @@ static struct slave *bond_xmit_3ad_xor_slave_get(struct bonding *bond,\n \tunsigned int count;\n \tu32 hash;\n \n-\thash = bond_xmit_hash(bond, skb);\n \tcount = slaves ? READ_ONCE(slaves-\u003ecount) : 0;\n \tif (unlikely(!count))\n \t\treturn NULL;\n \n+\thash = bond_xmit_hash(bond, skb);\n \tslave = slaves-\u003earr[hash % count];\n \treturn slave;\n }\n@@ -5289,9 +5289,65 @@ static bool bond_should_broadcast_neighbor(struct sk_buff *skb,\n \treturn false;\n }\n \n-/* Use this Xmit function for 3AD as well as XOR modes. The current\n- * usable slave array is formed in the control path. The xmit function\n- * just calculates hash and sends the packet out.\n+/* Called with RCU and bond-\u003emode_lock held. */\n+static bool bond_3ad_slave_is_eligible(struct slave *slave)\n+{\n+\tconst struct aggregator *agg;\n+\n+\tagg = rcu_dereference(SLAVE_AD_INFO(slave)-\u003eport.aggregator);\n+\treturn agg \u0026\u0026 agg-\u003eis_active \u0026\u0026 bond_slave_can_tx(slave);\n+}\n+\n+/* Called with RCU held when the transmit array has not caught up with\n+ * the 802.3ad state machine. Do not enable ports here: use the same\n+ * eligibility checks as bond_update_slave_arr().\n+ */\n+static struct slave *bond_3ad_xmit_fallback(struct bonding *bond, u32 hash)\n+{\n+\tstruct slave *selected = NULL;\n+\tunsigned int eligible = 0;\n+\tunsigned int target;\n+\tstruct list_head *iter;\n+\tstruct slave *slave;\n+\n+\t/* Netpoll can re-enter TX while the state machine holds mode_lock.\n+\t * Keep the existing empty-array drop behavior in that context.\n+\t */\n+\tif (unlikely(netpoll_tx_running(bond-\u003edev)))\n+\t\treturn NULL;\n+\n+\t/* Aggregator selection temporarily clears all is_active flags. Keep\n+\t * both loops under mode_lock to avoid observing that intermediate\n+\t * state. The caller's RCU read lock protects the selected slave.\n+\t */\n+\tspin_lock_bh(\u0026bond-\u003emode_lock);\n+\tbond_for_each_slave_rcu(bond, slave, iter)\n+\t\tif (bond_3ad_slave_is_eligible(slave))\n+\t\t\teligible++;\n+\n+\tif (!eligible)\n+\t\tgoto out;\n+\n+\ttarget = hash % eligible;\n+\tbond_for_each_slave_rcu(bond, slave, iter) {\n+\t\tif (!bond_3ad_slave_is_eligible(slave))\n+\t\t\tcontinue;\n+\n+\t\tif (!target) {\n+\t\t\tselected = slave;\n+\t\t\tbreak;\n+\t\t}\n+\t\ttarget--;\n+\t}\n+\n+out:\n+\tspin_unlock_bh(\u0026bond-\u003emode_lock);\n+\treturn selected;\n+}\n+\n+/* Use this Xmit function for 3AD as well as XOR modes. The usable slave\n+ * array is formed in the control path. In 3AD mode, fall back to the\n+ * current port state while an empty array awaits an update.\n */\n static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,\n \t\t\t\t struct net_device *dev)\n@@ -5302,6 +5358,8 @@ static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,\n \n \tslaves = rcu_dereference(bond-\u003eusable_slaves);\n \tslave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);\n+\tif (unlikely(!slave) \u0026\u0026 BOND_MODE(bond) == BOND_MODE_8023AD)\n+\t\tslave = bond_3ad_xmit_fallback(bond, bond_xmit_hash(bond, skb));\n \tif (likely(slave))\n \t\treturn bond_dev_queue_xmit(bond, skb, slave-\u003edev);\n \n"
} |
| 2/1 | 2026/09/15 11:16 | agent | patch-evaluator |
3mModel:core Args: null Results: {
"EnableConfigs": [
"BONDING",
"NET_CORE"
],
"FocusSymbols": [
"bond_3ad_xor_xmit",
"bond_3ad_xmit_fallback",
"bond_xmit_3ad_xor_slave_get",
"bond_3ad_slave_is_eligible",
"bond_start_xmit"
],
"Reasoning": "The patch modifies the transmit path of the Linux network bonding driver for 802.3ad and XOR modes (bond_3ad_xor_xmit and bond_xmit_3ad_xor_slave_get). It adds a fallback slave selection path (bond_3ad_xmit_fallback) that acquires bond-\u003emode_lock and iterates over slaves during packet transmission when the usable slave array is empty. This logic is easily reachable in standard virtualized environments via virtual network interfaces and warrants fuzzing for race conditions, deadlock/lockdep regressions, and null pointer dereferences.",
"WorthFuzzing": true
}Instruction: You are an expert Linux kernel maintainer and security engineer.
Your job is to review a provided patch series and evaluate whether it warrants fuzzing with syzkaller.
IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on internal assumptions. You must actively use your code access
tools to inspect the actual source code, callers, and surrounding context.
================================================================================
1. CORE TRIAGE PHILOSOPHY
================================================================================
The goal of patch fuzzing is to discover crashes, regressions, exposed latent bugs,
and newly triggered assertions introduced by the patch series.
- REACHABILITY IS THE PRIMARY GATE:
Fuzzing can only discover bugs in code that can actually execute in standard virtualized
environments (GCE or QEMU, utilizing software-emulated devices like USB gadgets, netdev, tun/tap).
If the modified code is structurally unreachable (see Section 2), it MUST NOT be fuzzed,
regardless of whether it adds assertions or complex logic.
- DO NOT BLINDLY TRUST "NO FUNCTIONAL CHANGE" (NFCI) OR "REFACTORING" CLAIMS:
Patch authors routinely label changes as "cleanups", "refactorings", or state
"No functional change intended". Do NOT take these claims at face value.
Code refactorings that rearrange logic, introduce helper functions, or alter state management
in core subsystems frequently introduce subtle semantic shifts or uncover latent kernel bugs.
If reachable executable code is modified or refactored, it MUST be fuzzed.
- NEW OR MODIFIED ASSERTIONS IN REACHABLE CODE MUST BE FUZZED:
When a patch introduces or modifies runtime checks or assertions (e.g., WARN_ON*, VM_WARN_ON*,
BUG_ON*, lockdep_assert*) in reachable code paths, it enforces new or stricter invariants.
Even if the author believes the invariant always holds, fuzzing is essential to verify whether
an unusual sequence of operations can violate it.
================================================================================
2. WHEN TO RETURN WorthFuzzing=false (NEGATIVE CRITERIA)
================================================================================
Return WorthFuzzing=false ONLY IF all modified code falls strictly into one or more of these categories:
- Non-kernel and non-executable changes:
* Modifications to Documentation/, comments, or spelling fixes.
* User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/)
that do not affect the compiled kernel image (vmlinux) or kernel modules.
* Purely decorative logging (e.g., message strings in pr_err, printk, dev_info) or tracepoints
that do not alter control flow or data structures.
* Build system or Kconfig changes that do not alter compiled C logic.
- Structurally unreachable hardware:
* Vendor-specific PCIe switches, SmartNICs, or GPU drivers (e.g., mlxsw, pds_core, qed,
ionic, amdgpu) requiring physical ASIC/PCIe cards not emulated in standard QEMU.
- Unreachable execution paths:
* Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during
physical PCI hot-unplug or manual sysfs driver unbinding.
* Code paths exclusive to architectures other than the target architecture.
================================================================================
3. WHEN TO RETURN WorthFuzzing=true (POSITIVE CRITERIA)
================================================================================
Return WorthFuzzing=true whenever the patch touches reachable executable code, including:
- Core Subsystems:
* Any logic modifications in memory management (mm/), synchronization/locking (kernel/locking/),
BPF, scheduler, core networking, VFS, or syscall handling.
- Refactorings and Code Cleanups:
* Any restructuring of reachable data structures, helper abstractions, or algorithm flows.
- Runtime Assertions and Defensive Checks:
* Any introduction or alteration of assertions (WARN_ON*, VM_WARN_ON*, BUG_ON*, etc.) in reachable paths.
- Reachable Drivers and Protocols:
* Drivers accessible via virtual buses (virtio, USB gadget, loopback, netlink, binder, sockets, etc.).
================================================================================
4. EXTRACTING FocusSymbols (PREVENTING DILUTION)
================================================================================
When WorthFuzzing=true, you must extract specific kernel functions into FocusSymbols to guide the fuzzer:
- AVOID UBIQUITOUS LIFECYCLE HOT-PATHS:
Do NOT list generic, ubiquitous functions called by almost every program in the corpus
(including, but not limited to: general memory allocators and deallocators, page fault
and trap handlers, or core synchronization primitives; this is not an exhaustive list).
Listing ubiquitous functions causes the fuzzer to classify thousands of unrelated tests as "focused",
which severely dilutes fuzzing effort away from the actual changes.
- TARGET SPECIFIC FEATURE LOGIC AND ENTRYPOINTS:
List functions that specifically implement the logic being added or altered, or direct API entrypoints
for the subsystem feature under review.
- HANDLING STATIC INLINE FUNCTIONS IN HEADERS (.h):
Compiler-inlined static functions (such as static inlines in mm/*.h or include/linux/*.h) lack
distinct symbol addresses in vmlinux and cannot be targeted directly by symbol coverage filters.
If the changes are primarily in static inline helpers, identify non-static, feature-specific caller
functions in .c files that exercise them (avoiding ubiquitous lifecycle wrappers).
================================================================================
5. IDENTIFYING EnableConfigs
================================================================================
Identify any specific CONFIG_ options required to properly compile and reach the modified code:
- Inspect Kconfig files and #ifdef guards; do not make assumptions.
- Check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed.
- Strip any '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: Target architecture: amd64
For your convenience, here is the diff of the changes:
commit 2f4b5c6964d2586f16c2dc9e152b8480d9cf6567
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Sep 15 11:16:48 2026 +0000
syz-cluster: applied patch under review
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index a9bff7663eeca..2cf280bf134f2 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -5233,11 +5233,11 @@ static struct slave *bond_xmit_3ad_xor_slave_get(struct bonding *bond,
unsigned int count;
u32 hash;
- hash = bond_xmit_hash(bond, skb);
count = slaves ? READ_ONCE(slaves->count) : 0;
if (unlikely(!count))
return NULL;
+ hash = bond_xmit_hash(bond, skb);
slave = slaves->arr[hash % count];
return slave;
}
@@ -5289,9 +5289,65 @@ static bool bond_should_broadcast_neighbor(struct sk_buff *skb,
return false;
}
-/* Use this Xmit function for 3AD as well as XOR modes. The current
- * usable slave array is formed in the control path. The xmit function
- * just calculates hash and sends the packet out.
+/* Called with RCU and bond->mode_lock held. */
+static bool bond_3ad_slave_is_eligible(struct slave *slave)
+{
+ const struct aggregator *agg;
+
+ agg = rcu_dereference(SLAVE_AD_INFO(slave)->port.aggregator);
+ return agg && agg->is_active && bond_slave_can_tx(slave);
+}
+
+/* Called with RCU held when the transmit array has not caught up with
+ * the 802.3ad state machine. Do not enable ports here: use the same
+ * eligibility checks as bond_update_slave_arr().
+ */
+static struct slave *bond_3ad_xmit_fallback(struct bonding *bond, u32 hash)
+{
+ struct slave *selected = NULL;
+ unsigned int eligible = 0;
+ unsigned int target;
+ struct list_head *iter;
+ struct slave *slave;
+
+ /* Netpoll can re-enter TX while the state machine holds mode_lock.
+ * Keep the existing empty-array drop behavior in that context.
+ */
+ if (unlikely(netpoll_tx_running(bond->dev)))
+ return NULL;
+
+ /* Aggregator selection temporarily clears all is_active flags. Keep
+ * both loops under mode_lock to avoid observing that intermediate
+ * state. The caller's RCU read lock protects the selected slave.
+ */
+ spin_lock_bh(&bond->mode_lock);
+ bond_for_each_slave_rcu(bond, slave, iter)
+ if (bond_3ad_slave_is_eligible(slave))
+ eligible++;
+
+ if (!eligible)
+ goto out;
+
+ target = hash % eligible;
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (!bond_3ad_slave_is_eligible(slave))
+ continue;
+
+ if (!target) {
+ selected = slave;
+ break;
+ }
+ target--;
+ }
+
+out:
+ spin_unlock_bh(&bond->mode_lock);
+ return selected;
+}
+
+/* Use this Xmit function for 3AD as well as XOR modes. The usable slave
+ * array is formed in the control path. In 3AD mode, fall back to the
+ * current port state while an empty array awaits an update.
*/
static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,
struct net_device *dev)
@@ -5302,6 +5358,8 @@ static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,
slaves = rcu_dereference(bond->usable_slaves);
slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);
+ if (unlikely(!slave) && BOND_MODE(bond) == BOND_MODE_8023AD)
+ slave = bond_3ad_xmit_fallback(bond, bond_xmit_hash(bond, skb));
if (likely(slave))
return bond_dev_queue_xmit(bond, skb, slave->dev);
|
| 3/2 | 2026/09/15 11:16 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 3825 output: 28 thoughts: 401 Thoughts: **Analyzing the Bonding Patch** Okay, let's break this down. First, I need to understand the changes in this patch. It's touching `drivers/net/bonding/bond_main.c`, specifically related to the 802.3ad transmit logic. I see they've moved the hash calculation (`hash = bond_xmit_hash(bond, skb);`) to after the initial null check in `bond_xmit_3ad_xor_slave_get`. That's interesting, but the addition of `bond_3ad_slave_is_eligible` and `bond_3ad_xmit_fallback` in `bond_3ad_xor_xmit` is more intriguing. It looks like `bond_3ad_xmit_fallback` is called if there's no slave and the bonding mode is 802.3ad. I wonder what situations would trigger this. Now, let's step back and consider the broader context. The instructions say to consider reachability; bonding should be easily accessible in QEMU and virtualized environments because it's standard Linux networking. That's good. They mention netlink, `ip link add...`, and that syzcaller regularly fuzzes it. That confirms this is something actively being targeted. The critical point here is the executable code modification, particularly the transmit logic changes in `bond_main.c`. The introduction of `bond_3ad_xmit_fallback` and, crucially, the use of `spin_lock_bh(&bond->mode_lock)` in the transmit path is a flashing neon sign. Locking in the transmit path screams potential for deadlocks or lockdep issues, especially since it's a `spin_lock_bh`. We need to verify if the `mode_lock` is taken elsewhere in bottom-half context (BH) or in conjunction with other locks. This is a prime target for fuzzing. Finally, I need to double-check the Kconfig. Where is bonding actually defined? Let me quickly check the Makefile or Kconfig files within that directory. I want to make sure the bonding driver is properly enabled in our testing environment. |
| 4/2 | 2026/09/15 11:17 | tool | grepper |
0mArgs:{
"Expression": "BONDING",
"PathPrefix": "drivers/net/bonding"
}Results: {
"Output": "drivers/net/bonding/Makefile-5-\ndrivers/net/bonding/Makefile:6:obj-$(CONFIG_BONDING) += bonding.o\ndrivers/net/bonding/Makefile-7-\n--\ndrivers/net/bonding/bond_main.c=1266=void bond_change_active_slave(struct bonding *bond, struct slave *new_active)\n--\ndrivers/net/bonding/bond_main.c-1332-\ndrivers/net/bonding/bond_main.c:1333:\t\t\tcall_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond-\u003edev);\ndrivers/net/bonding/bond_main.c-1334-\n--\ndrivers/net/bonding/bond_main.c=1888=int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,\n--\ndrivers/net/bonding/bond_main.c-2094-\ndrivers/net/bonding/bond_main.c:2095:\tslave_dev-\u003epriv_flags |= IFF_BONDING;\ndrivers/net/bonding/bond_main.c-2096-\t/* initialize slave stats */\n--\ndrivers/net/bonding/bond_main.c-2375-\tif (!netif_is_bond_master(slave_dev))\ndrivers/net/bonding/bond_main.c:2376:\t\tslave_dev-\u003epriv_flags \u0026= ~IFF_BONDING;\ndrivers/net/bonding/bond_main.c-2377-\tdev_close(slave_dev);\n--\ndrivers/net/bonding/bond_main.c=2425=static int __bond_release_one(struct net_device *bond_dev,\n--\ndrivers/net/bonding/bond_main.c-2594-\tif (!netif_is_bond_master(slave_dev))\ndrivers/net/bonding/bond_main.c:2595:\t\tslave_dev-\u003epriv_flags \u0026= ~IFF_BONDING;\ndrivers/net/bonding/bond_main.c-2596-\n--\ndrivers/net/bonding/bond_main.c=4068=static int bond_netdev_event(struct notifier_block *this,\n--\ndrivers/net/bonding/bond_main.c-4075-\ndrivers/net/bonding/bond_main.c:4076:\tif (!(event_dev-\u003epriv_flags \u0026 IFF_BONDING))\ndrivers/net/bonding/bond_main.c-4077-\t\treturn NOTIFY_DONE;\n--\ndrivers/net/bonding/bond_main.c=6050=void bond_setup(struct net_device *bond_dev)\n--\ndrivers/net/bonding/bond_main.c-6072-\tbond_dev-\u003eflags |= IFF_MASTER;\ndrivers/net/bonding/bond_main.c:6073:\tbond_dev-\u003epriv_flags |= IFF_BONDING | IFF_UNICAST_FLT | IFF_NO_QUEUE;\ndrivers/net/bonding/bond_main.c-6074-\tbond_dev-\u003epriv_flags \u0026= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);\n"
} |
| 5/2 | 2026/09/15 11:17 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 5522 output: 34 thoughts: 23 Thoughts: Here's my thinking process: **Diving into the 802.3ad Kconfig Dependencies** Okay, so I need to figure out the dependencies for 802.3ad configuration. Given the context, that likely involves the Linux kernel's configuration system, specifically Kconfig files. The suggestion to check `drivers/net/bonding/Kconfig` is spot on. That's the logical place to start digging into the bonding driver, which is where 802.3ad, as a link aggregation standard, is implemented within the kernel. I'll need to examine that file to understand what other configuration options or features might be required or are automatically enabled when 802.3ad support is selected. This includes looking for any relevant dependencies on other drivers, network features, or kernel subsystems. Time to open that file and get to work! |
| 6/2 | 2026/09/15 11:17 | tool | read-file |
0mError:the file does not exist Args: {
"File": "drivers/net/bonding/Kconfig",
"FirstLine": 1,
"LineCount": 50
}Results: {
"error": "the file does not exist"
} |
| 7/2 | 2026/09/15 11:17 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 5782 output: 26 thoughts: 13 Thoughts: Here's my thought process, as requested: **Tracing the CONFIG_BONDING Macro** Alright, time to get to the bottom of this. My immediate thought is, "Where exactly is `CONFIG_BONDING` defined?" This is the core question. I need to figure out where this macro is set or unset to understand its impact on the system. This probably involves a quick search through kernel configuration files, header files, or build scripts. I'll need to use my usual tools for this - `grep`, `find`, or maybe even a more sophisticated search within the kernel source. The goal is to identify the location of the definition (or potential definitions) and understand the context surrounding it. Once I have the location, I can start to piece together what aspects of the system depend on this option being enabled or disabled. |
| 8/2 | 2026/09/15 11:17 | tool | grepper |
0mArgs:{
"Expression": "config BONDING",
"PathPrefix": "drivers/net"
}Results: {
"Output": "drivers/net/Kconfig=39=if NET_CORE\ndrivers/net/Kconfig-40-\ndrivers/net/Kconfig:41:config BONDING\ndrivers/net/Kconfig-42-\ttristate \"Bonding driver support\"\n"
} |
| 9/2 | 2026/09/15 11:17 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 6068 output: 33 thoughts: 18 Thoughts: Here's a summary of my thought process, as requested: **Kconfig Dive** Alright, let's get down to brass tacks. I need to understand something about the network configuration, so my initial instinct is to dig into the `Kconfig` files. Specifically, I'm thinking that the `drivers/net/Kconfig` file is the most likely place to start. I'm going to jump in around line 41, as that's often a good starting point for exploring the structure of these files. Hopefully, this will give me a good overview of the available network drivers and their dependencies. This should help me pinpoint the area relevant to the current investigation. |
| 10/2 | 2026/09/15 11:17 | tool | read-file |
0mArgs:{
"File": "drivers/net/Kconfig",
"FirstLine": 38,
"LineCount": 30
}Results: {
"Contents": " 38:\t\n 39:\tif NET_CORE\n 40:\t\n 41:\tconfig BONDING\n 42:\t\ttristate \"Bonding driver support\"\n 43:\t\tdepends on INET\n 44:\t\tdepends on TLS || TLS_DEVICE=n\n 45:\t\thelp\n 46:\t\t Say 'Y' or 'M' if you wish to be able to 'bond' multiple Ethernet\n 47:\t\t Channels together. This is called 'Etherchannel' by Cisco,\n 48:\t\t 'Trunking' by Sun, 802.3ad by the IEEE, and 'Bonding' in Linux.\n 49:\t\n 50:\t\t The driver supports multiple bonding modes to allow for both high\n 51:\t\t performance and high availability operation.\n 52:\t\n 53:\t\t Refer to \u003cfile:Documentation/networking/bonding.rst\u003e for more\n 54:\t\t information.\n 55:\t\n 56:\t\t To compile this driver as a module, choose M here: the module\n 57:\t\t will be called bonding.\n 58:\t\n 59:\tconfig DUMMY\n 60:\t\ttristate \"Dummy net driver support\"\n 61:\t\thelp\n 62:\t\t This is essentially a bit-bucket device (i.e. traffic you send to\n 63:\t\t this device is consigned into oblivion) with a configurable IP\n 64:\t\t address. It is most commonly used in order to make your currently\n 65:\t\t inactive SLIP address seem like a real address for local programs.\n 66:\t\t If you use SLIP or PPP, you might want to say Y here. It won't\n 67:\t\t enlarge your kernel. What a deal. Read about it in the Network\n"
} |
| 11/2 | 2026/09/15 11:17 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 6717 output: 30 thoughts: 64 Thoughts: **Examining the Dependencies of Network Bonding Configuration** Okay, so `CONFIG_BONDING`... right, I need to figure out its dependencies. First things first, it relies on `INET`. That makes sense; bonding is fundamentally an IP-layer thing. Let me quickly verify `NET_CORE` and `INET` are enabled, just to confirm the basics. Yep, those are standard and should be fine. So, `BONDING` is the key config option in this scenario, though `INET` is naturally implied. I should check if there are other, related configuration options that deal with bonding or 802.3ad specifically. Perhaps other configurations that affect the behavior of bonding. |
| 12/2 | 2026/09/15 11:17 | tool | grepper |
0mArgs:{
"Expression": "CONFIG_.*BOND",
"PathPrefix": "drivers/net/bonding"
}Results: {
"Output": "drivers/net/bonding/Makefile-5-\ndrivers/net/bonding/Makefile:6:obj-$(CONFIG_BONDING) += bonding.o\ndrivers/net/bonding/Makefile-7-\n"
} |
| 13/2 | 2026/09/15 11:18 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 7017 output: 40 thoughts: 62 Thoughts: **Focusing on Bonding Configuration** Okay, so the scope here is explicitly limited to `CONFIG_BONDING`. Excellent, that narrows things down considerably. Now, the next logical step is to dive into the core implementation, specifically the `drivers/net/bonding/bond_main.c` file. I need to understand the functions directly involved in this bonding configuration. I think the critical areas will be around lines 5233 and 5289 within that file. Let's see what's happening there. |
| 14/2 | 2026/09/15 11:18 | tool | read-file |
0mArgs:{
"File": "drivers/net/bonding/bond_main.c",
"FirstLine": 5230,
"LineCount": 85
}Results: {
"Contents": "5230:\t\t\t\t\t\t\t struct bond_up_slave *slaves)\n5231:\t{\n5232:\t\tstruct slave *slave;\n5233:\t\tunsigned int count;\n5234:\t\tu32 hash;\n5235:\t\n5236:\t\tcount = slaves ? READ_ONCE(slaves-\u003ecount) : 0;\n5237:\t\tif (unlikely(!count))\n5238:\t\t\treturn NULL;\n5239:\t\n5240:\t\thash = bond_xmit_hash(bond, skb);\n5241:\t\tslave = slaves-\u003earr[hash % count];\n5242:\t\treturn slave;\n5243:\t}\n5244:\t\n5245:\tstatic struct slave *bond_xdp_xmit_3ad_xor_slave_get(struct bonding *bond,\n5246:\t\t\t\t\t\t\t struct xdp_buff *xdp)\n5247:\t{\n5248:\t\tstruct bond_up_slave *slaves;\n5249:\t\tunsigned int count;\n5250:\t\tu32 hash;\n5251:\t\n5252:\t\thash = bond_xmit_hash_xdp(bond, xdp);\n5253:\t\tslaves = rcu_dereference(bond-\u003eusable_slaves);\n5254:\t\tcount = slaves ? READ_ONCE(slaves-\u003ecount) : 0;\n5255:\t\tif (unlikely(!count))\n5256:\t\t\treturn NULL;\n5257:\t\n5258:\t\treturn slaves-\u003earr[hash % count];\n5259:\t}\n5260:\t\n5261:\tstatic bool bond_should_broadcast_neighbor(struct sk_buff *skb,\n5262:\t\t\t\t\t\t struct net_device *dev)\n5263:\t{\n5264:\t\tstruct bonding *bond = netdev_priv(dev);\n5265:\t\tstruct {\n5266:\t\t\tstruct ipv6hdr ip6;\n5267:\t\t\tstruct icmp6hdr icmp6;\n5268:\t\t} *combined, _combined;\n5269:\t\n5270:\t\tif (!static_branch_unlikely(\u0026bond_bcast_neigh_enabled))\n5271:\t\t\treturn false;\n5272:\t\n5273:\t\tif (!bond-\u003eparams.broadcast_neighbor)\n5274:\t\t\treturn false;\n5275:\t\n5276:\t\tif (skb-\u003eprotocol == htons(ETH_P_ARP))\n5277:\t\t\treturn true;\n5278:\t\n5279:\t\tif (skb-\u003eprotocol == htons(ETH_P_IPV6)) {\n5280:\t\t\tcombined = skb_header_pointer(skb, skb_mac_header_len(skb),\n5281:\t\t\t\t\t\t sizeof(_combined),\n5282:\t\t\t\t\t\t \u0026_combined);\n5283:\t\t\tif (combined \u0026\u0026 combined-\u003eip6.nexthdr == NEXTHDR_ICMP \u0026\u0026\n5284:\t\t\t (combined-\u003eicmp6.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||\n5285:\t\t\t combined-\u003eicmp6.icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT))\n5286:\t\t\t\treturn true;\n5287:\t\t}\n5288:\t\n5289:\t\treturn false;\n5290:\t}\n5291:\t\n5292:\t/* Called with RCU and bond-\u003emode_lock held. */\n5293:\tstatic bool bond_3ad_slave_is_eligible(struct slave *slave)\n5294:\t{\n5295:\t\tconst struct aggregator *agg;\n5296:\t\n5297:\t\tagg = rcu_dereference(SLAVE_AD_INFO(slave)-\u003eport.aggregator);\n5298:\t\treturn agg \u0026\u0026 agg-\u003eis_active \u0026\u0026 bond_slave_can_tx(slave);\n5299:\t}\n5300:\t\n5301:\t/* Called with RCU held when the transmit array has not caught up with\n5302:\t * the 802.3ad state machine. Do not enable ports here: use the same\n5303:\t * eligibility checks as bond_update_slave_arr().\n5304:\t */\n5305:\tstatic struct slave *bond_3ad_xmit_fallback(struct bonding *bond, u32 hash)\n5306:\t{\n5307:\t\tstruct slave *selected = NULL;\n5308:\t\tunsigned int eligible = 0;\n5309:\t\tunsigned int target;\n5310:\t\tstruct list_head *iter;\n5311:\t\tstruct slave *slave;\n5312:\t\n5313:\t\t/* Netpoll can re-enter TX while the state machine holds mode_lock.\n5314:\t\t * Keep the existing empty-array drop behavior in that context.\n"
} |
| 15/2 | 2026/09/15 11:18 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 8502 output: 40 thoughts: 18 Thoughts: Okay, here's my attempt at summarizing the thought process, as requested, geared toward an expert audience, and written in the first person: **Diving Back In: Lines 5315-5370** Alright, let's pick this back up. The analysis is starting to get dense, but I need to make sure I haven't missed anything crucial. My focus now is on lines 5315 to 5370. This section is probably addressing the nuances of the *[Insert field relevant concept here, e.g., edge-case handling in the algorithm, the implications of the variable's lifecycle, the comparative analysis of the proposed model with the benchmark, etc.]*. Given the preceding discussion, I'm expecting to see a deeper dive into *[Specific element expected from prior analysis, e.g., the potential sources of error, the performance degradation under specific conditions, the interplay of parameters, etc.]*. I'll be looking carefully for *[Specific indicators or keywords related to their expertise, e.g., any mention of regularization, specific thresholds, deviations from the theoretical ideal, sensitivity analyses, etc.]*. I need to determine if any of these arguments are sufficiently convincing, so that I can validate, modify, or reject it for use in my final determination of *[This would be the users conclusion, e.g. the best methodology, the most accurate model, the final implementation for a new use case, etc.]*. Ok, let's see what's being said... |
| 16/2 | 2026/09/15 11:18 | tool | read-file |
0mArgs:{
"File": "drivers/net/bonding/bond_main.c",
"FirstLine": 5315,
"LineCount": 55
}Results: {
"Contents": "5315:\t\t */\n5316:\t\tif (unlikely(netpoll_tx_running(bond-\u003edev)))\n5317:\t\t\treturn NULL;\n5318:\t\n5319:\t\t/* Aggregator selection temporarily clears all is_active flags. Keep\n5320:\t\t * both loops under mode_lock to avoid observing that intermediate\n5321:\t\t * state. The caller's RCU read lock protects the selected slave.\n5322:\t\t */\n5323:\t\tspin_lock_bh(\u0026bond-\u003emode_lock);\n5324:\t\tbond_for_each_slave_rcu(bond, slave, iter)\n5325:\t\t\tif (bond_3ad_slave_is_eligible(slave))\n5326:\t\t\t\teligible++;\n5327:\t\n5328:\t\tif (!eligible)\n5329:\t\t\tgoto out;\n5330:\t\n5331:\t\ttarget = hash % eligible;\n5332:\t\tbond_for_each_slave_rcu(bond, slave, iter) {\n5333:\t\t\tif (!bond_3ad_slave_is_eligible(slave))\n5334:\t\t\t\tcontinue;\n5335:\t\n5336:\t\t\tif (!target) {\n5337:\t\t\t\tselected = slave;\n5338:\t\t\t\tbreak;\n5339:\t\t\t}\n5340:\t\t\ttarget--;\n5341:\t\t}\n5342:\t\n5343:\tout:\n5344:\t\tspin_unlock_bh(\u0026bond-\u003emode_lock);\n5345:\t\treturn selected;\n5346:\t}\n5347:\t\n5348:\t/* Use this Xmit function for 3AD as well as XOR modes. The usable slave\n5349:\t * array is formed in the control path. In 3AD mode, fall back to the\n5350:\t * current port state while an empty array awaits an update.\n5351:\t */\n5352:\tstatic netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,\n5353:\t\t\t\t\t struct net_device *dev)\n5354:\t{\n5355:\t\tstruct bonding *bond = netdev_priv(dev);\n5356:\t\tstruct bond_up_slave *slaves;\n5357:\t\tstruct slave *slave;\n5358:\t\n5359:\t\tslaves = rcu_dereference(bond-\u003eusable_slaves);\n5360:\t\tslave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);\n5361:\t\tif (unlikely(!slave) \u0026\u0026 BOND_MODE(bond) == BOND_MODE_8023AD)\n5362:\t\t\tslave = bond_3ad_xmit_fallback(bond, bond_xmit_hash(bond, skb));\n5363:\t\tif (likely(slave))\n5364:\t\t\treturn bond_dev_queue_xmit(bond, skb, slave-\u003edev);\n5365:\t\n5366:\t\treturn bond_tx_drop(dev, skb);\n5367:\t}\n5368:\t\n5369:\t/* in broadcast mode, we send everything to all or usable slave interfaces.\n"
} |
| 17/2 | 2026/09/15 11:18 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 9723 output: 34 thoughts: 38 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience: **Investigating the `bond_3ad_xor_xmit` Function** Okay, so I need to understand the role of this `bond_3ad_xor_xmit` function within the system. My immediate questions are: What other code paths *use* this function? I need to understand the call graph, how this function is actually *called* into execution. Knowing its dependencies upstream is critical. Conversely, I also need to figure out how `bond_3ad_xor_xmit` is *set up*, how its variables are initialized, and what conditions trigger its invocation. Is it a direct call, a function pointer, an interrupt handler, or something else entirely? A comprehensive understanding requires a view from both sides of the equation. |
| 18/2 | 2026/09/15 11:18 | tool | grepper |
0mArgs:{
"Expression": "bond_3ad_xor_xmit",
"PathPrefix": "drivers/net/bonding"
}Results: {
"Output": "drivers/net/bonding/bond_main.c=5305=static struct slave *bond_3ad_xmit_fallback(struct bonding *bond, u32 hash)\n--\ndrivers/net/bonding/bond_main.c-5351- */\ndrivers/net/bonding/bond_main.c:5352:static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,\ndrivers/net/bonding/bond_main.c-5353-\t\t\t\t struct net_device *dev)\n--\ndrivers/net/bonding/bond_main.c=5608=static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)\n--\ndrivers/net/bonding/bond_main.c-5630-\tcase BOND_MODE_XOR:\ndrivers/net/bonding/bond_main.c:5631:\t\treturn bond_3ad_xor_xmit(skb, dev);\ndrivers/net/bonding/bond_main.c-5632-\tcase BOND_MODE_BROADCAST:\n"
} |
| 19/2 | 2026/09/15 11:18 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 10257 output: 32 thoughts: 50 Thoughts: Here's my summary, as though I'm thinking through this process: **Diving into the Bonding Driver's Transmission Path** Okay, so `__bond_start_xmit` – that's the key, the `ndo_start_xmit` handler for this bonding driver. My immediate goal is to understand what triggers this function. I need to trace the path, essentially following the packet's journey from the network stack down to the hardware. My next step is to examine the callers of `__bond_start_xmit`. I'll want to see where this function is being invoked from within the driver itself or even from other parts of the kernel. Understanding the call stack gives me the context – who's responsible for the eventual transmission, and how the bond driver interacts with the system to start with. Alternatively, I could look at how `bond_netdev_ops` is initialized. Seeing what methods and functions are assigned to the `net_device` struct will give me a greater perspective of how the driver is set up. This will help understand the bigger picture of where `__bond_start_xmit` fits within the bonding driver's operations and potentially see how the networking stack is interacting with the bonding setup. |
| 20/2 | 2026/09/15 11:18 | tool | grepper |
0mArgs:{
"Expression": "__bond_start_xmit",
"PathPrefix": "drivers/net/bonding"
}Results: {
"Output": "drivers/net/bonding/bond_main.c=5593=static netdev_tx_t bond_tls_device_xmit(struct bonding *bond, struct sk_buff *skb,\n--\ndrivers/net/bonding/bond_main.c-5607-\ndrivers/net/bonding/bond_main.c:5608:static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)\ndrivers/net/bonding/bond_main.c-5609-{\n--\ndrivers/net/bonding/bond_main.c=5646=static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)\n--\ndrivers/net/bonding/bond_main.c-5658-\tif (bond_has_slaves(bond))\ndrivers/net/bonding/bond_main.c:5659:\t\tret = __bond_start_xmit(skb, dev);\ndrivers/net/bonding/bond_main.c-5660-\telse\n"
} |
| 21/2 | 2026/09/15 11:18 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 10882 output: 38 thoughts: 104 Thoughts: **Analyzing the Bonding Driver's Transmission Logic** Okay, so I'm diving into this bonding driver code, specifically focusing on the transmission (xmit) path. I see that `bond_start_xmit` is essentially the `ndo_start_xmit` callback, which makes sense. Now, the modifications and additions seem centered around the "3ad\_xor" transmission method. I'm noting `bond_3ad_xor_xmit`, `bond_xmit_3ad_xor_slave_get`, `bond_3ad_xmit_fallback`, and `bond_3ad_slave_is_eligible`. My primary interest at the moment is how `bond_xmit_3ad_xor_slave_get` is used. I'm going to quickly check the cross-references and determine where else it might be called. This will give me an immediate sense of its role within the broader bonding architecture. |
| 22/2 | 2026/09/15 11:18 | tool | grepper |
0mArgs:{
"Expression": "bond_xmit_3ad_xor_slave_get",
"PathPrefix": "drivers/net/bonding"
}Results: {
"Output": "drivers/net/bonding/bond_main.c=5158=int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)\n--\ndrivers/net/bonding/bond_main.c-5227-\ndrivers/net/bonding/bond_main.c:5228:static struct slave *bond_xmit_3ad_xor_slave_get(struct bonding *bond,\ndrivers/net/bonding/bond_main.c-5229-\t\t\t\t\t\t struct sk_buff *skb,\n--\ndrivers/net/bonding/bond_main.c=5352=static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,\n--\ndrivers/net/bonding/bond_main.c-5359-\tslaves = rcu_dereference(bond-\u003eusable_slaves);\ndrivers/net/bonding/bond_main.c:5360:\tslave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);\ndrivers/net/bonding/bond_main.c-5361-\tif (unlikely(!slave) \u0026\u0026 BOND_MODE(bond) == BOND_MODE_8023AD)\n--\ndrivers/net/bonding/bond_main.c=5471=static struct net_device *bond_xmit_get_slave(struct net_device *master_dev,\n--\ndrivers/net/bonding/bond_main.c-5491-\t\t\tslaves = rcu_dereference(bond-\u003eusable_slaves);\ndrivers/net/bonding/bond_main.c:5492:\t\tslave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);\ndrivers/net/bonding/bond_main.c-5493-\t\tbreak;\n"
} |
| 23/2 | 2026/09/15 11:18 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 11673 output: 31 thoughts: 451 Thoughts: **My Analysis of the WorthFuzzing Patch** Okay, let's break this down. First, the question of whether this `WorthFuzzing` modification is actually, well, *worth* fuzzing. The answer is a resounding yes. We're talking about changes to the transmit path within the network bonding driver, specifically around the 802.3ad mode (`bond_3ad_xor_xmit`, `bond_xmit_3ad_xor_slave_get`, and the introduction of `bond_3ad_xmit_fallback`). The addition of `spin_lock_bh(&bond->mode_lock)` during fallback is a clear red flag; any changes to locking within a critical path like this scream potential for issues. And, good, this is all reachable under standard fuzzing environments: network interfaces, bonding virtual devices, netlink, the usual suspects. I can already see the kinds of bugs we're likely to uncover: deadlocks, lockdep warnings (that `mode_lock` potentially taken under other locks...), race conditions, null pointer dereferences, and even those pesky off-by-one errors in hash selection. Now, on to the FocusSymbols. The patch pinpoints these functions as important: `bond_3ad_xor_xmit`, `bond_3ad_xmit_fallback`, `bond_xmit_3ad_xor_slave_get`, `bond_3ad_slave_is_eligible`, and `bond_start_xmit`. Let's quickly check on `bond_3ad_xmit_fallback` and `bond_3ad_slave_is_eligible`, since those are static. Ah, yes, both are static functions within `bond_main.c`. Are they inlined? `bond_3ad_xmit_fallback` has loops and spinlocks which would make it unlikely, but even if inlined or not, static functions in .c files are often useful to target. `bond_3ad_xor_xmit` is also static. Let's make sure about `bond_start_xmit`. Okay, let's see. Looks like it's defined as: `static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)`. Perfect. So we are good to go. |
| 24/2 | 2026/09/15 11:18 | tool | grepper |
0mArgs:{
"Expression": "bond_start_xmit",
"PathPrefix": "drivers/net/bonding"
}Results: {
"Output": "drivers/net/bonding/bond_main.c=5593=static netdev_tx_t bond_tls_device_xmit(struct bonding *bond, struct sk_buff *skb,\n--\ndrivers/net/bonding/bond_main.c-5607-\ndrivers/net/bonding/bond_main.c:5608:static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)\ndrivers/net/bonding/bond_main.c-5609-{\n--\ndrivers/net/bonding/bond_main.c-5645-\ndrivers/net/bonding/bond_main.c:5646:static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)\ndrivers/net/bonding/bond_main.c-5647-{\n--\ndrivers/net/bonding/bond_main.c-5658-\tif (bond_has_slaves(bond))\ndrivers/net/bonding/bond_main.c:5659:\t\tret = __bond_start_xmit(skb, dev);\ndrivers/net/bonding/bond_main.c-5660-\telse\n--\ndrivers/net/bonding/bond_main.c=6000=static const struct net_device_ops bond_netdev_ops = {\n--\ndrivers/net/bonding/bond_main.c-6004-\t.ndo_stop\t\t= bond_close,\ndrivers/net/bonding/bond_main.c:6005:\t.ndo_start_xmit\t\t= bond_start_xmit,\ndrivers/net/bonding/bond_main.c-6006-\t.ndo_select_queue\t= bond_select_queue,\n"
} |
| 25/2 | 2026/09/15 11:18 | llm | patch-evaluator |
1mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 13111 output: 35 thoughts: 245 Thoughts: **My Analysis of Bonding Driver Modifications** Okay, so I'm looking at how the bonding driver's transmit functions have been updated. Specifically, `bond_start_xmit`, which is the `ndo_start_xmit` function within the `net_device_ops` structure. My focus is on the direct modifications and additions: `bond_3ad_xmit_fallback`, `bond_3ad_xor_xmit`, `bond_xmit_3ad_xor_slave_get`, and `bond_3ad_slave_is_eligible`. These likely relate to the 802.3ad (Link Aggregation Control Protocol) mode, particularly the XOR transmission mode, and potentially a fallback mechanism. Now, I need to check the relevant configuration options. `CONFIG_BONDING` is the core driver configuration – that's the obvious starting point. I need to ensure it has all of the necessary dependencies, so I should look through `drivers/net/Kconfig`. Right, `BONDING` depends on `INET` and `(TLS || TLS_DEVICE=n)`. It also needs `NET_CORE`. So, `BONDING` and `INET` are the key configs here. Next, I need to confirm whether `BOND_MODE_8023AD` has any separate dependencies or associated configurations. I'll quickly grep the codebase for `BOND_MODE_8023AD` and `802.3ad` to be certain. This will provide further clarity. |
| 26/2 | 2026/09/15 11:20 | tool | grepper |
0mArgs:{
"Expression": "BOND_MODE_8023AD",
"PathPrefix": "drivers/net/bonding"
}Results: {
"Output": "drivers/net/bonding/bond_main.c=272=const char *bond_mode_name(int mode)\n--\ndrivers/net/bonding/bond_main.c-278-\t\t[BOND_MODE_BROADCAST] = \"fault-tolerance (broadcast)\",\ndrivers/net/bonding/bond_main.c:279:\t\t[BOND_MODE_8023AD] = \"IEEE 802.3ad Dynamic link aggregation\",\ndrivers/net/bonding/bond_main.c-280-\t\t[BOND_MODE_TLB] = \"transmit load balancing\",\n--\ndrivers/net/bonding/bond_main.c=312=static bool bond_sk_check(struct bonding *bond)\n--\ndrivers/net/bonding/bond_main.c-314-\tswitch (BOND_MODE(bond)) {\ndrivers/net/bonding/bond_main.c:315:\tcase BOND_MODE_8023AD:\ndrivers/net/bonding/bond_main.c-316-\tcase BOND_MODE_XOR:\n--\ndrivers/net/bonding/bond_main.c=325=bool __bond_xdp_check(int mode, int xmit_policy)\n--\ndrivers/net/bonding/bond_main.c-330-\t\treturn true;\ndrivers/net/bonding/bond_main.c:331:\tcase BOND_MODE_8023AD:\ndrivers/net/bonding/bond_main.c-332-\tcase BOND_MODE_XOR:\n--\ndrivers/net/bonding/bond_main.c=756=int bond_set_carrier(struct bonding *bond)\n--\ndrivers/net/bonding/bond_main.c-763-\ndrivers/net/bonding/bond_main.c:764:\tif (BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-765-\t\treturn bond_3ad_set_carrier(bond);\n--\ndrivers/net/bonding/bond_main.c=913=static void bond_hw_addr_flush(struct net_device *bond_dev,\n--\ndrivers/net/bonding/bond_main.c-920-\ndrivers/net/bonding/bond_main.c:921:\tif (BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-922-\t\tdev_mc_del(slave_dev, lacpdu_mcast_addr);\n--\ndrivers/net/bonding/bond_main.c=1176=static bool bond_should_notify_peers(struct bonding *bond)\n--\ndrivers/net/bonding/bond_main.c-1190-\t */\ndrivers/net/bonding/bond_main.c:1191:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-1192-\t\tusable = rcu_dereference_rtnl(bond-\u003eusable_slaves);\n--\ndrivers/net/bonding/bond_main.c=1266=void bond_change_active_slave(struct bonding *bond, struct slave *new_active)\n--\ndrivers/net/bonding/bond_main.c-1293-\ndrivers/net/bonding/bond_main.c:1294:\t\t\tif (BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-1295-\t\t\t\tbond_3ad_handle_link_change(new_active, BOND_LINK_UP);\n--\ndrivers/net/bonding/bond_main.c=1423=static void bond_poll_controller(struct net_device *bond_dev)\n--\ndrivers/net/bonding/bond_main.c-1429-\ndrivers/net/bonding/bond_main.c:1430:\tif (BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-1431-\t\tif (bond_3ad_get_active_agg_info(bond, \u0026ad_info))\n--\ndrivers/net/bonding/bond_main.c-1437-\ndrivers/net/bonding/bond_main.c:1438:\t\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-1439-\t\t\tstruct aggregator *agg =\n--\ndrivers/net/bonding/bond_main.c=1665=static enum netdev_lag_tx_type bond_lag_tx_type(struct bonding *bond)\n--\ndrivers/net/bonding/bond_main.c-1674-\tcase BOND_MODE_XOR:\ndrivers/net/bonding/bond_main.c:1675:\tcase BOND_MODE_8023AD:\ndrivers/net/bonding/bond_main.c-1676-\t\treturn NETDEV_LAG_TX_TYPE_HASH;\n--\ndrivers/net/bonding/bond_main.c=1732=static void slave_kobj_release(struct kobject *kobj)\n--\ndrivers/net/bonding/bond_main.c-1737-\tcancel_delayed_work_sync(\u0026slave-\u003enotify_work);\ndrivers/net/bonding/bond_main.c:1738:\tif (BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-1739-\t\tkfree(SLAVE_AD_INFO(slave));\n--\ndrivers/net/bonding/bond_main.c=1763=static struct slave *bond_alloc_slave(struct bonding *bond,\n--\ndrivers/net/bonding/bond_main.c-1778-\ndrivers/net/bonding/bond_main.c:1779:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-1780-\t\tSLAVE_AD_INFO(slave) = kzalloc_obj(struct ad_slave_info);\n--\ndrivers/net/bonding/bond_main.c=1888=int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,\n--\ndrivers/net/bonding/bond_main.c-1960-\t\t\tif (slave_dev-\u003etype != ARPHRD_ETHER \u0026\u0026\ndrivers/net/bonding/bond_main.c:1961:\t\t\t BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-1962-\t\t\t\tSLAVE_NL_ERR(bond_dev, slave_dev, extack,\n--\ndrivers/net/bonding/bond_main.c-2178-\t\tbreak;\ndrivers/net/bonding/bond_main.c:2179:\tcase BOND_MODE_8023AD:\ndrivers/net/bonding/bond_main.c-2180-\t\t/* in 802.3ad mode, the internal mechanism\n--\ndrivers/net/bonding/bond_main.c-2281-\ndrivers/net/bonding/bond_main.c:2282:\t\t\tif (BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-2283-\t\t\t\tdev_mc_add(slave_dev, lacpdu_mcast_addr);\n--\ndrivers/net/bonding/bond_main.c=2425=static int __bond_release_one(struct net_device *bond_dev,\n--\ndrivers/net/bonding/bond_main.c-2474-\ndrivers/net/bonding/bond_main.c:2475:\tif (BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-2476-\t\tbond_3ad_unbind_slave(slave);\n--\ndrivers/net/bonding/bond_main.c=2764=static void bond_miimon_link_change(struct bonding *bond,\n--\ndrivers/net/bonding/bond_main.c-2768-\tswitch (BOND_MODE(bond)) {\ndrivers/net/bonding/bond_main.c:2769:\tcase BOND_MODE_8023AD:\ndrivers/net/bonding/bond_main.c-2770-\t\tbond_3ad_handle_link_change(slave, link);\n--\ndrivers/net/bonding/bond_main.c=2782=static void bond_miimon_commit(struct bonding *bond)\n--\ndrivers/net/bonding/bond_main.c-2799-\t\t\t */\ndrivers/net/bonding/bond_main.c:2800:\t\t\tif (BOND_MODE(bond) == BOND_MODE_8023AD \u0026\u0026\ndrivers/net/bonding/bond_main.c-2801-\t\t\t slave-\u003elink == BOND_LINK_UP)\n--\ndrivers/net/bonding/bond_main.c-2820-\t\t\tprimary = rtnl_dereference(bond-\u003eprimary_slave);\ndrivers/net/bonding/bond_main.c:2821:\t\t\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-2822-\t\t\t\t/* prevent it from being the active one */\n--\ndrivers/net/bonding/bond_main.c-2848-\t\t\tif (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||\ndrivers/net/bonding/bond_main.c:2849:\t\t\t BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-2850-\t\t\t\tbond_set_slave_inactive_flags(slave,\n--\ndrivers/net/bonding/bond_main.c=3943=static int bond_slave_netdev_event(unsigned long event,\n--\ndrivers/net/bonding/bond_main.c-3981-\t\tif (bond_update_speed_duplex(slave) \u0026\u0026\ndrivers/net/bonding/bond_main.c:3982:\t\t BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-3983-\t\t\tif (slave-\u003elast_link_up)\n--\ndrivers/net/bonding/bond_main.c-3988-\ndrivers/net/bonding/bond_main.c:3989:\t\tif (BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-3990-\t\t\tbond_3ad_adapter_speed_duplex_changed(slave);\n--\ndrivers/net/bonding/bond_main.c=4345=static int bond_open(struct net_device *bond_dev)\n--\ndrivers/net/bonding/bond_main.c-4363-\t\t\t\t\t\t\t BOND_SLAVE_NOTIFY_NOW);\ndrivers/net/bonding/bond_main.c:4364:\t\t\t} else if (BOND_MODE(bond) != BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-4365-\t\t\t\tbond_set_slave_active_flags(slave,\n--\ndrivers/net/bonding/bond_main.c-4388-\ndrivers/net/bonding/bond_main.c:4389:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-4390-\t\tqueue_delayed_work(bond-\u003ewq, \u0026bond-\u003ead_work, 0);\n--\ndrivers/net/bonding/bond_main.c=4408=static int bond_close(struct net_device *bond_dev)\n--\ndrivers/net/bonding/bond_main.c-4422-\ndrivers/net/bonding/bond_main.c:4423:\tif (BOND_MODE(bond) == BOND_MODE_8023AD \u0026\u0026\ndrivers/net/bonding/bond_main.c-4424-\t bond-\u003eparams.broadcast_neighbor)\n--\ndrivers/net/bonding/bond_main.c=5145=static void bond_reset_slave_arr(struct bonding *bond)\n--\ndrivers/net/bonding/bond_main.c-5151- * to determine the slave interface -\ndrivers/net/bonding/bond_main.c:5152: * (a) BOND_MODE_8023AD\ndrivers/net/bonding/bond_main.c-5153- * (b) BOND_MODE_XOR\n--\ndrivers/net/bonding/bond_main.c=5158=int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)\n--\ndrivers/net/bonding/bond_main.c-5173-\t}\ndrivers/net/bonding/bond_main.c:5174:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-5175-\t\tstruct ad_info ad_info;\n--\ndrivers/net/bonding/bond_main.c-5195-\t\tall_slaves-\u003earr[all_slaves-\u003ecount++] = slave;\ndrivers/net/bonding/bond_main.c:5196:\t\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-5197-\t\t\tconst struct aggregator *agg;\n--\ndrivers/net/bonding/bond_main.c=5352=static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,\n--\ndrivers/net/bonding/bond_main.c-5360-\tslave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);\ndrivers/net/bonding/bond_main.c:5361:\tif (unlikely(!slave) \u0026\u0026 BOND_MODE(bond) == BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-5362-\t\tslave = bond_3ad_xmit_fallback(bond, bond_xmit_hash(bond, skb));\n--\ndrivers/net/bonding/bond_main.c=5471=static struct net_device *bond_xmit_get_slave(struct net_device *master_dev,\n--\ndrivers/net/bonding/bond_main.c-5485-\t\tbreak;\ndrivers/net/bonding/bond_main.c:5486:\tcase BOND_MODE_8023AD:\ndrivers/net/bonding/bond_main.c-5487-\tcase BOND_MODE_XOR:\n--\ndrivers/net/bonding/bond_main.c=5608=static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)\n--\ndrivers/net/bonding/bond_main.c-5625-\t\treturn bond_xmit_activebackup(skb, dev);\ndrivers/net/bonding/bond_main.c:5626:\tcase BOND_MODE_8023AD:\ndrivers/net/bonding/bond_main.c-5627-\t\tif (bond_should_broadcast_neighbor(skb, dev))\n--\ndrivers/net/bonding/bond_main.c=5668=bond_xdp_get_xmit_slave(struct net_device *bond_dev, struct xdp_buff *xdp)\n--\ndrivers/net/bonding/bond_main.c-5683-\ndrivers/net/bonding/bond_main.c:5684:\tcase BOND_MODE_8023AD:\ndrivers/net/bonding/bond_main.c-5685-\tcase BOND_MODE_XOR:\n--\ndrivers/net/bonding/bond_main.c=6143=static int __init bond_check_params(struct bond_params *params)\n--\ndrivers/net/bonding/bond_main.c-6188-\tif (lacp_rate) {\ndrivers/net/bonding/bond_main.c:6189:\t\tif (bond_mode != BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_main.c-6190-\t\t\tpr_info(\"lacp_rate param is irrelevant in mode %s\\n\",\n--\ndrivers/net/bonding/bond_main.c-6213-\t\tparams-\u003ead_select = valptr-\u003evalue;\ndrivers/net/bonding/bond_main.c:6214:\t\tif (bond_mode != BOND_MODE_8023AD)\ndrivers/net/bonding/bond_main.c-6215-\t\t\tpr_warn(\"ad_select param only affects 802.3ad mode\\n\");\n--\ndrivers/net/bonding/bond_netlink.c=37=static int bond_fill_slave_info(struct sk_buff *skb,\n--\ndrivers/net/bonding/bond_netlink.c-63-\ndrivers/net/bonding/bond_netlink.c:64:\tif (BOND_MODE(slave-\u003ebond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_netlink.c-65-\t\tconst struct aggregator *agg;\n--\ndrivers/net/bonding/bond_netlink.c=700=static int bond_fill_info(struct sk_buff *skb,\n--\ndrivers/net/bonding/bond_netlink.c-866-\ndrivers/net/bonding/bond_netlink.c:867:\tif (mode == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_netlink.c-868-\t\tstruct ad_info info;\n--\ndrivers/net/bonding/bond_netlink.c=933=static int bond_fill_linkxstats(struct sk_buff *skb,\n--\ndrivers/net/bonding/bond_netlink.c-958-\t\treturn -EMSGSIZE;\ndrivers/net/bonding/bond_netlink.c:959:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_netlink.c-960-\t\tstruct bond_3ad_stats *stats;\n--\ndrivers/net/bonding/bond_options.c=98=static const struct bond_opt_value bond_mode_tbl[] = {\n--\ndrivers/net/bonding/bond_options.c-102-\t{ \"broadcast\", BOND_MODE_BROADCAST, 0},\ndrivers/net/bonding/bond_options.c:103:\t{ \"802.3ad\", BOND_MODE_8023AD, 0},\ndrivers/net/bonding/bond_options.c-104-\t{ \"balance-tlb\", BOND_MODE_TLB, 0},\n--\ndrivers/net/bonding/bond_options.c=262=static const struct bond_option bond_opts[BOND_OPT_LAST] = {\n--\ndrivers/net/bonding/bond_options.c-289-\t\t.desc = \"validate src/dst of ARP probes\",\ndrivers/net/bonding/bond_options.c:290:\t\t.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |\ndrivers/net/bonding/bond_options.c-291-\t\t\t BIT(BOND_MODE_ALB),\n--\ndrivers/net/bonding/bond_options.c-313-\t\t.desc = \"arp interval in milliseconds\",\ndrivers/net/bonding/bond_options.c:314:\t\t.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |\ndrivers/net/bonding/bond_options.c-315-\t\t\t BIT(BOND_MODE_ALB),\n--\ndrivers/net/bonding/bond_options.c-322-\t\t.desc = \"Maximum number of missed ARP interval\",\ndrivers/net/bonding/bond_options.c:323:\t\t.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |\ndrivers/net/bonding/bond_options.c-324-\t\t\t BIT(BOND_MODE_ALB),\n--\ndrivers/net/bonding/bond_options.c-360-\t\t.flags = BOND_OPTFLAG_IFDOWN,\ndrivers/net/bonding/bond_options.c:361:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-362-\t\t.values = bond_lacp_active,\n--\ndrivers/net/bonding/bond_options.c-369-\t\t.flags = BOND_OPTFLAG_IFDOWN,\ndrivers/net/bonding/bond_options.c:370:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-371-\t\t.values = bond_lacp_rate_tbl,\n--\ndrivers/net/bonding/bond_options.c-377-\t\t.desc = \"Define the LACP fallback mode when no slaves have negotiated\",\ndrivers/net/bonding/bond_options.c:378:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-379-\t\t.values = bond_lacp_strict_tbl,\n--\ndrivers/net/bonding/bond_options.c-501-\t\t.name = \"ad_actor_sys_prio\",\ndrivers/net/bonding/bond_options.c:502:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-503-\t\t.values = bond_ad_actor_sys_prio_tbl,\n--\ndrivers/net/bonding/bond_options.c-508-\t\t.name = \"actor_port_prio\",\ndrivers/net/bonding/bond_options.c:509:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-510-\t\t.flags = BOND_OPTFLAG_RAWVAL,\n--\ndrivers/net/bonding/bond_options.c-515-\t\t.name = \"ad_actor_system\",\ndrivers/net/bonding/bond_options.c:516:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-517-\t\t.flags = BOND_OPTFLAG_RAWVAL,\n--\ndrivers/net/bonding/bond_options.c-522-\t\t.name = \"ad_user_port_key\",\ndrivers/net/bonding/bond_options.c:523:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-524-\t\t.flags = BOND_OPTFLAG_IFDOWN,\n--\ndrivers/net/bonding/bond_options.c-545-\t\t.desc = \"Opt into using coupled control MUX for LACP states\",\ndrivers/net/bonding/bond_options.c:546:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-547-\t\t.flags = BOND_OPTFLAG_IFDOWN,\n--\ndrivers/net/bonding/bond_options.c-554-\t\t.desc = \"Broadcast neighbor packets to all active slaves\",\ndrivers/net/bonding/bond_options.c:555:\t\t.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),\ndrivers/net/bonding/bond_options.c-556-\t\t.values = bond_broadcast_neigh_tbl,\n--\ndrivers/net/bonding/bond_procfs.c=59=static void bond_info_show_master(struct seq_file *seq)\n--\ndrivers/net/bonding/bond_procfs.c-154-\ndrivers/net/bonding/bond_procfs.c:155:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_procfs.c-156-\t\tstruct ad_info ad_info;\n--\ndrivers/net/bonding/bond_procfs.c=198=static void bond_info_show_slave(struct seq_file *seq,\n--\ndrivers/net/bonding/bond_procfs.c-221-\ndrivers/net/bonding/bond_procfs.c:222:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_procfs.c-223-\t\tconst struct port *port = \u0026SLAVE_AD_INFO(slave)-\u003eport;\n--\ndrivers/net/bonding/bond_sysfs.c=529=static ssize_t bonding_show_ad_aggregator(struct device *d,\n--\ndrivers/net/bonding/bond_sysfs.c-535-\ndrivers/net/bonding/bond_sysfs.c:536:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_sysfs.c-537-\t\tstruct ad_info ad_info;\n--\ndrivers/net/bonding/bond_sysfs.c=550=static ssize_t bonding_show_ad_num_ports(struct device *d,\n--\ndrivers/net/bonding/bond_sysfs.c-556-\ndrivers/net/bonding/bond_sysfs.c:557:\tif (BOND_MODE(bond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_sysfs.c-558-\t\tstruct ad_info ad_info;\n--\ndrivers/net/bonding/bond_sysfs.c=571=static ssize_t bonding_show_ad_actor_key(struct device *d,\n--\ndrivers/net/bonding/bond_sysfs.c-577-\ndrivers/net/bonding/bond_sysfs.c:578:\tif (BOND_MODE(bond) == BOND_MODE_8023AD \u0026\u0026 capable(CAP_NET_ADMIN)) {\ndrivers/net/bonding/bond_sysfs.c-579-\t\tstruct ad_info ad_info;\n--\ndrivers/net/bonding/bond_sysfs.c=592=static ssize_t bonding_show_ad_partner_key(struct device *d,\n--\ndrivers/net/bonding/bond_sysfs.c-598-\ndrivers/net/bonding/bond_sysfs.c:599:\tif (BOND_MODE(bond) == BOND_MODE_8023AD \u0026\u0026 capable(CAP_NET_ADMIN)) {\ndrivers/net/bonding/bond_sysfs.c-600-\t\tstruct ad_info ad_info;\n--\ndrivers/net/bonding/bond_sysfs.c=613=static ssize_t bonding_show_ad_partner_mac(struct device *d,\n--\ndrivers/net/bonding/bond_sysfs.c-619-\ndrivers/net/bonding/bond_sysfs.c:620:\tif (BOND_MODE(bond) == BOND_MODE_8023AD \u0026\u0026 capable(CAP_NET_ADMIN)) {\ndrivers/net/bonding/bond_sysfs.c-621-\t\tstruct ad_info ad_info;\n--\ndrivers/net/bonding/bond_sysfs.c=725=static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,\n--\ndrivers/net/bonding/bond_sysfs.c-730-\ndrivers/net/bonding/bond_sysfs.c:731:\tif (BOND_MODE(bond) == BOND_MODE_8023AD \u0026\u0026 capable(CAP_NET_ADMIN))\ndrivers/net/bonding/bond_sysfs.c-732-\t\treturn sysfs_emit(buf, \"%hu\\n\", READ_ONCE(bond-\u003eparams.ad_actor_sys_prio));\n--\ndrivers/net/bonding/bond_sysfs.c=739=static ssize_t bonding_show_ad_actor_system(struct device *d,\n--\ndrivers/net/bonding/bond_sysfs.c-744-\ndrivers/net/bonding/bond_sysfs.c:745:\tif (BOND_MODE(bond) == BOND_MODE_8023AD \u0026\u0026 capable(CAP_NET_ADMIN))\ndrivers/net/bonding/bond_sysfs.c-746-\t\treturn sysfs_emit(buf, \"%pM\\n\", bond-\u003eparams.ad_actor_system);\n--\ndrivers/net/bonding/bond_sysfs.c=754=static ssize_t bonding_show_ad_user_port_key(struct device *d,\n--\ndrivers/net/bonding/bond_sysfs.c-759-\ndrivers/net/bonding/bond_sysfs.c:760:\tif (BOND_MODE(bond) == BOND_MODE_8023AD \u0026\u0026 capable(CAP_NET_ADMIN))\ndrivers/net/bonding/bond_sysfs.c-761-\t\treturn sysfs_emit(buf, \"%hu\\n\",\n--\ndrivers/net/bonding/bond_sysfs_slave.c=60=static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)\n--\ndrivers/net/bonding/bond_sysfs_slave.c-63-\ndrivers/net/bonding/bond_sysfs_slave.c:64:\tif (BOND_MODE(slave-\u003ebond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_sysfs_slave.c-65-\t\trcu_read_lock();\n--\ndrivers/net/bonding/bond_sysfs_slave.c=80=static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)\n--\ndrivers/net/bonding/bond_sysfs_slave.c-83-\ndrivers/net/bonding/bond_sysfs_slave.c:84:\tif (BOND_MODE(slave-\u003ebond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_sysfs_slave.c-85-\t\tad_port = \u0026SLAVE_AD_INFO(slave)-\u003eport;\n--\ndrivers/net/bonding/bond_sysfs_slave.c=95=static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)\n--\ndrivers/net/bonding/bond_sysfs_slave.c-98-\ndrivers/net/bonding/bond_sysfs_slave.c:99:\tif (BOND_MODE(slave-\u003ebond) == BOND_MODE_8023AD) {\ndrivers/net/bonding/bond_sysfs_slave.c-100-\t\tad_port = \u0026SLAVE_AD_INFO(slave)-\u003eport;\n"
} |
| 27/2 | 2026/09/15 11:20 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 21589 output: 225 thoughts: 300 Thoughts: **My Assessment of the 802.3ad Bonding Patch** Okay, so this patch is entirely contained within `CONFIG_BONDING`, no surprises there. Good. Let's dig in and make absolutely sure this analysis is correct. First, the WorthFuzzing assessment is spot on. The patch *does* fundamentally alter the packet transmit path for bonding devices using 802.3ad (LACP) and XOR modes. It's delaying the hash calculation until after the slave count is checked. And that fallback mechanism (`bond_3ad_xmit_fallback`) is concerning because it's triggered when the usable slave array is out of sync with the 802.3ad state machine. This introduction of new locking – `spin_lock_bh(&bond->mode_lock)` – and RCU-protected slave iterations *within* the fast transmit path is a red flag. That's a perfect recipe for exposing potential lockdep violations, race conditions, or even those pesky null pointer dereferences. I'm especially keen to scrutinize `bond_3ad_xor_xmit`, `bond_3ad_xmit_fallback`, `bond_xmit_3ad_xor_slave_get`, `bond_3ad_slave_is_eligible` and `bond_start_xmit`. Those are the key symbols to keep an eye on. The EnableConfigs are as expected: `BONDING` and `NET_CORE`. Makes sense, of course. Yep, looks like we've got it all. Time to call `set-results`. |
| 28/2 | 2026/09/15 11:20 | tool | set-results |
0mArgs:{
"EnableConfigs": [
"BONDING",
"NET_CORE"
],
"FocusSymbols": [
"bond_3ad_xor_xmit",
"bond_3ad_xmit_fallback",
"bond_xmit_3ad_xor_slave_get",
"bond_3ad_slave_is_eligible",
"bond_start_xmit"
],
"Reasoning": "The patch modifies the transmit path of the Linux network bonding driver for 802.3ad and XOR modes (bond_3ad_xor_xmit and bond_xmit_3ad_xor_slave_get). It adds a fallback slave selection path (bond_3ad_xmit_fallback) that acquires bond-\u003emode_lock and iterates over slaves during packet transmission when the usable slave array is empty. This logic is easily reachable in standard virtualized environments via virtual network interfaces and warrants fuzzing for race conditions, deadlock/lockdep regressions, and null pointer dereferences.",
"WorthFuzzing": true
}Results: {
"EnableConfigs": [
"BONDING",
"NET_CORE"
],
"FocusSymbols": [
"bond_3ad_xor_xmit",
"bond_3ad_xmit_fallback",
"bond_xmit_3ad_xor_slave_get",
"bond_3ad_slave_is_eligible",
"bond_start_xmit"
],
"Reasoning": "The patch modifies the transmit path of the Linux network bonding driver for 802.3ad and XOR modes (bond_3ad_xor_xmit and bond_xmit_3ad_xor_slave_get). It adds a fallback slave selection path (bond_3ad_xmit_fallback) that acquires bond-\u003emode_lock and iterates over slaves during packet transmission when the usable slave array is empty. This logic is easily reachable in standard virtualized environments via virtual network interfaces and warrants fuzzing for race conditions, deadlock/lockdep regressions, and null pointer dereferences.",
"WorthFuzzing": true
} |
| 29/1 | 2026/09/15 11:20 | action | If |
0mArgs:{
"WorthFuzzing": true
}Results: null |
| 30/2 | 2026/09/15 11:20 | agent | kmsan-evaluator |
0mModel:core Args: null Results: {
"KMSANReasoning": "The patch addresses transmit fallback in the bonding driver for 802.3ad mode when usable_slaves array has not caught up. It delays computing bond_xmit_hash() until count is checked and adds bond_3ad_xmit_fallback() to iterate over eligible slaves under bond-\u003emode_lock.\n\nAll local variables introduced or modified (e.g. selected, eligible, target, hash, count) are fully and explicitly initialized before use. The patch does not introduce any memory allocations, copy data to user space, or alter buffer bounds in a way that could lead to uninitialized memory exposure. Potential concerns with this patch (locking under mode_lock, RCU synchronization, NULL pointers) fall squarely under LOCKDEP and KASAN. Therefore, a dedicated KMSAN fuzzing session is not warranted.",
"NeedsKMSAN": false
}Instruction: You are an expert Linux kernel security engineer specializing in kernel memory
error detectors (KASAN and KMSAN). Your job is to review the provided patch series and
determine if the code changes justify spawning a dedicated KMSAN (KernelMemorySanitizer)
fuzzing session in addition to standard KASAN fuzzing.
CRITICAL DISTINCTION BETWEEN KASAN AND KMSAN:
- Standard KASAN kernel builds (upstream-apparmor-kasan.config) already enable
a comprehensive suite of debugging tools and sanitizers, including KASAN
(out-of-bounds accesses, use-after-free, double free, invalid free), LOCKDEP
(locking bugs and deadlocks), UB-sanitizers, and memory corruption checks.
- KMSAN (KernelMemorySanitizer) detects reads of UNINITIALIZED memory (stack, heap,
or page allocations) and kernel-to-user memory info-leaks.
Rule: THERE IS NO SENSE IN RUNNING A KMSAN SESSION IF A BUG CAN BE CAUGHT BY KASAN,
LOCKDEP, OR OTHER STANDARD BUG DETECTORS.
A dedicated KMSAN fuzzing session incurs significant resource costs. You must ONLY
set NeedsKMSAN=true if the code changes introduce or expose UNINITIALIZED MEMORY risks
that are detected ONLY by KMSAN.
Look holistically at the patch series and surrounding code. Even if no direct
uninitialized field accesses or new buffer allocations are added in the diff itself,
a patch may alter control flow, bounds checking, or data length calculations in ways
that change how the rest of the code operates on existing buffers (e.g. allowing
uninitialized stack/heap memory to be read, copied to user space, or used in control
flow). Do not hesitate to use your code access tools to inspect the surrounding code,
called functions, and callers.
Set NeedsKMSAN=true ONLY IF the patch introduces or modifies:
1. Kernel structures sent to user space (via copy_to_user, put_user, netlink skb
attributes, ioctl output arguments, socket options, or BPF buffers) where fields
or structure padding might not be fully initialized/zeroed.
2. Conditional logic or branching that depends on potentially uninitialized variables
or struct fields.
3. Allocation or initialization of complex data structures where uninitialized fields
could be read later in reachable code paths.
4. Bounds checks, lengths, or logic in a way that allows surrounding code to access
uninitialized bytes of existing buffers.
Set NeedsKMSAN=false IF:
- The code changes primarily risk out-of-bounds access, array overflows, NULL pointer
dereferences, locking deadlocks, or use-after-free bugs (these are already caught
by KASAN, LOCKDEP, or standard bug detectors).
- All stack/heap structures touched or introduced by the patch are fully zeroed
or initialized (e.g. using = {0}, memset, kzalloc) before being read or copied.
- The patch does not introduce any risk of uninitialized memory usage or info-leaks.
Use your code access tools to inspect the surrounding code if necessary, then provide
detailed KMSANReasoning contrasting KASAN vs KMSAN applicability for this patch.
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: Target architecture: amd64
For your convenience, here is the diff of the changes:
commit 2f4b5c6964d2586f16c2dc9e152b8480d9cf6567
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Sep 15 11:16:48 2026 +0000
syz-cluster: applied patch under review
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index a9bff7663eeca..2cf280bf134f2 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -5233,11 +5233,11 @@ static struct slave *bond_xmit_3ad_xor_slave_get(struct bonding *bond,
unsigned int count;
u32 hash;
- hash = bond_xmit_hash(bond, skb);
count = slaves ? READ_ONCE(slaves->count) : 0;
if (unlikely(!count))
return NULL;
+ hash = bond_xmit_hash(bond, skb);
slave = slaves->arr[hash % count];
return slave;
}
@@ -5289,9 +5289,65 @@ static bool bond_should_broadcast_neighbor(struct sk_buff *skb,
return false;
}
-/* Use this Xmit function for 3AD as well as XOR modes. The current
- * usable slave array is formed in the control path. The xmit function
- * just calculates hash and sends the packet out.
+/* Called with RCU and bond->mode_lock held. */
+static bool bond_3ad_slave_is_eligible(struct slave *slave)
+{
+ const struct aggregator *agg;
+
+ agg = rcu_dereference(SLAVE_AD_INFO(slave)->port.aggregator);
+ return agg && agg->is_active && bond_slave_can_tx(slave);
+}
+
+/* Called with RCU held when the transmit array has not caught up with
+ * the 802.3ad state machine. Do not enable ports here: use the same
+ * eligibility checks as bond_update_slave_arr().
+ */
+static struct slave *bond_3ad_xmit_fallback(struct bonding *bond, u32 hash)
+{
+ struct slave *selected = NULL;
+ unsigned int eligible = 0;
+ unsigned int target;
+ struct list_head *iter;
+ struct slave *slave;
+
+ /* Netpoll can re-enter TX while the state machine holds mode_lock.
+ * Keep the existing empty-array drop behavior in that context.
+ */
+ if (unlikely(netpoll_tx_running(bond->dev)))
+ return NULL;
+
+ /* Aggregator selection temporarily clears all is_active flags. Keep
+ * both loops under mode_lock to avoid observing that intermediate
+ * state. The caller's RCU read lock protects the selected slave.
+ */
+ spin_lock_bh(&bond->mode_lock);
+ bond_for_each_slave_rcu(bond, slave, iter)
+ if (bond_3ad_slave_is_eligible(slave))
+ eligible++;
+
+ if (!eligible)
+ goto out;
+
+ target = hash % eligible;
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (!bond_3ad_slave_is_eligible(slave))
+ continue;
+
+ if (!target) {
+ selected = slave;
+ break;
+ }
+ target--;
+ }
+
+out:
+ spin_unlock_bh(&bond->mode_lock);
+ return selected;
+}
+
+/* Use this Xmit function for 3AD as well as XOR modes. The usable slave
+ * array is formed in the control path. In 3AD mode, fall back to the
+ * current port state while an empty array awaits an update.
*/
static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,
struct net_device *dev)
@@ -5302,6 +5358,8 @@ static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,
slaves = rcu_dereference(bond->usable_slaves);
slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);
+ if (unlikely(!slave) && BOND_MODE(bond) == BOND_MODE_8023AD)
+ slave = bond_3ad_xmit_fallback(bond, bond_xmit_hash(bond, skb));
if (likely(slave))
return bond_dev_queue_xmit(bond, skb, slave->dev);
|
| 31/3 | 2026/09/15 11:20 | llm | kmsan-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 3037 output: 35 thoughts: 1234 Thoughts: **KMSAN Analysis of Bonding Driver Patch** Alright, let's break this down. The core of this patch seems to be a modification to the bonding driver, specifically around the `bond_3ad_xor_xmit` function, which handles packet transmission in both 802.3ad (LACP) and XOR bonding modes. My initial thought is to identify if there are any obvious memory safety issues being addressed, that KMSAN should be involved in testing. Looking at the code, the key change involves introducing a fallback mechanism within `bond_3ad_xor_xmit`. The original logic was straightforward: get a slave from `bond_xmit_3ad_xor_slave_get` and transmit the packet. The patch adds a check: if `bond_xmit_3ad_xor_slave_get` returns `NULL`, and the bond is in 802.3ad mode, it calls `bond_3ad_xmit_fallback`. Now, let's analyze `bond_3ad_xmit_fallback`. This function iterates through the bonded slaves, and selects one based on their eligibility. Eligibility is determined by `bond_3ad_slave_is_eligible`, which checks if the slave is active within the aggregator. This sounds like it could be a place for race conditions to occur if locking is not handled correctly. The use of RCU locks indicate this code is concerned with concurrency. The use of RCU reads could introduce read-after-free conditions. But the locking within `bond_3ad_xmit_fallback` also looks involved. A spinlock is used, so any race issues are more likely to be found via mutex- or spinlock-related issues. The main concern is around the concurrent access to the `usable_slaves` array and the state of the slave devices. The code attempts to protect against this, using RCU read locks, and a spinlock in `bond_3ad_xmit_fallback`. Therefore, I'm leaning toward this *not* requiring a dedicated KMSAN fuzzing session. The locking seems reasonable, and the checks are present to maintain memory safety. The patch does not have any direct allocations or deallocations of memory, the code is likely re-using pre-allocated memory structures, and the main changes are around concurrency, and not raw memory access. Therefore, my conclusion is `NeedsKMSAN=false`. |
| 32/3 | 2026/09/15 11:20 | tool | grepper |
0mArgs:{
"Expression": "bond_3ad_xor_xmit",
"PathPrefix": "drivers/net/bonding/"
}Results: {
"Output": "drivers/net/bonding/bond_main.c=5305=static struct slave *bond_3ad_xmit_fallback(struct bonding *bond, u32 hash)\n--\ndrivers/net/bonding/bond_main.c-5351- */\ndrivers/net/bonding/bond_main.c:5352:static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,\ndrivers/net/bonding/bond_main.c-5353-\t\t\t\t struct net_device *dev)\n--\ndrivers/net/bonding/bond_main.c=5608=static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)\n--\ndrivers/net/bonding/bond_main.c-5630-\tcase BOND_MODE_XOR:\ndrivers/net/bonding/bond_main.c:5631:\t\treturn bond_3ad_xor_xmit(skb, dev);\ndrivers/net/bonding/bond_main.c-5632-\tcase BOND_MODE_BROADCAST:\n"
} |
| 33/3 | 2026/09/15 11:20 | llm | kmsan-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 5105 output: 196 thoughts: 1142 Thoughts: **Analysis of Bonding Driver Patch: Avoiding Uninitialized Memory Reads** Okay, let's break this down. My goal here is to assess whether this patch introduces any risks related to uninitialized memory, specifically with the KMSAN tool in mind. I'm seeing changes related to fallback slave selection within the 802.3ad bonding mode, particularly when `bond->usable_slaves` is empty. The patch's primary concern seems to be making sure the system doesn't crash in edge cases. First, I examine the code flow. In `bond_xmit_3ad_xor_slave_get`, the patch introduces a check for `count` (number of slaves) *before* calculating the hash. If the `count` is zero, it immediately returns NULL, avoiding an unnecessary hash computation. This is a good optimization. Then, in the `bond_3ad_xor_xmit` function, if the `slave` is NULL, I see a call to `bond_3ad_xmit_fallback`. Now, focusing on `bond_3ad_xmit_fallback`, I'm looking for uninitialized variables. I'm seeing `selected` is initialized to NULL, `eligible` is initialized to 0, `target` is assigned a value based on `hash` and `eligible`, and the other variables are used inside loops. Crucially, `target` is only used after being initialized with the result of a modulo operation with the `eligible` count, so I'm happy with that one. The patch then iterates through eligible slaves and picks one. The selected slave is returned, and in `bond_3ad_xor_xmit`, the packet is sent. The patch itself deals with the fallback slave selection when a valid slave isn't available, but is that a problem? Is there any new risk? I check if it introduces any structures going to user space, and it doesn't. No new allocations that could leave uninitialized fields. There's also no logic that would make the existing buffers have uninitialized content. No new risks there. Checking all the criteria, it's pretty clear: all variables are initialized correctly before use, there are no structure copies to user space, no new memory allocations, and no potential to read uninitialized data. The risks I see relate to locking, concurrency, and potential NULL dereferences, but these are issues already covered by KASAN and LOCKDEP. KMSAN is irrelevant here. Everything looks good. |
| 34/3 | 2026/09/15 11:20 | tool | set-results |
0mArgs:{
"KMSANReasoning": "The patch addresses transmit fallback in the bonding driver for 802.3ad mode when usable_slaves array has not caught up. It delays computing bond_xmit_hash() until count is checked and adds bond_3ad_xmit_fallback() to iterate over eligible slaves under bond-\u003emode_lock.\n\nAll local variables introduced or modified (e.g. selected, eligible, target, hash, count) are fully and explicitly initialized before use. The patch does not introduce any memory allocations, copy data to user space, or alter buffer bounds in a way that could lead to uninitialized memory exposure. Potential concerns with this patch (locking under mode_lock, RCU synchronization, NULL pointers) fall squarely under LOCKDEP and KASAN. Therefore, a dedicated KMSAN fuzzing session is not warranted.",
"NeedsKMSAN": false
}Results: {
"KMSANReasoning": "The patch addresses transmit fallback in the bonding driver for 802.3ad mode when usable_slaves array has not caught up. It delays computing bond_xmit_hash() until count is checked and adds bond_3ad_xmit_fallback() to iterate over eligible slaves under bond-\u003emode_lock.\n\nAll local variables introduced or modified (e.g. selected, eligible, target, hash, count) are fully and explicitly initialized before use. The patch does not introduce any memory allocations, copy data to user space, or alter buffer bounds in a way that could lead to uninitialized memory exposure. Potential concerns with this patch (locking under mode_lock, RCU synchronization, NULL pointers) fall squarely under LOCKDEP and KASAN. Therefore, a dedicated KMSAN fuzzing session is not warranted.",
"NeedsKMSAN": false
} |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|