AI Trajectory

null

{
  "EnableConfigs": [
    "VSOCKETS",
    "VSOCKETS_LOOPBACK"
  ],
  "FocusSymbols": [
    "vsock_connectible_setsockopt"
  ],
  "KMSANReasoning": "The patch adds bounds checking for socket options SO_VM_SOCKETS_BUFFER_MAX_SIZE and SO_VM_SOCKETS_BUFFER_MIN_SIZE in vsock_connectible_setsockopt. It ensures that the maximum buffer size is not less than the minimum buffer size, and vice versa. The values are copied from user space using the COPY_IN macro, which fully initializes the local variable `val`. The changes only involve integer validation and do not introduce any risk of uninitialized memory usage, kernel-to-user info-leaks, or uninitialized structure fields. Therefore, KMSAN is not applicable here.",
  "NeedsKMSAN": false,
  "Reasoning": "The patch adds validation for SO_VM_SOCKETS_BUFFER_MAX_SIZE and SO_VM_SOCKETS_BUFFER_MIN_SIZE socket options in vsock_connectible_setsockopt. This is a functional change in the vsock setsockopt implementation that handles bounds checking for buffer sizes. It is reachable from user space via the setsockopt syscall on vsock sockets.",
  "WorthFuzzing": true
}

null

{
  "PatchDiff": "commit f7ffc1894441e9af444e6ed2cf55e9f1dc946344\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Mon Aug 24 10:04:17 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c\nindex a33b2a2d381dc..5faa30ee87453 100644\n--- a/net/vmw_vsock/af_vsock.c\n+++ b/net/vmw_vsock/af_vsock.c\n@@ -2050,12 +2050,20 @@ static int vsock_connectible_setsockopt(struct socket *sock,\n \n \tcase SO_VM_SOCKETS_BUFFER_MAX_SIZE:\n \t\tCOPY_IN(val);\n+\t\tif (val \u003c vsk-\u003ebuffer_min_size) {\n+\t\t\terr = -EINVAL;\n+\t\t\tgoto exit;\n+\t\t}\n \t\tvsk-\u003ebuffer_max_size = val;\n \t\tvsock_update_buffer_size(vsk, transport, vsk-\u003ebuffer_size);\n \t\tbreak;\n \n \tcase SO_VM_SOCKETS_BUFFER_MIN_SIZE:\n \t\tCOPY_IN(val);\n+\t\tif (val \u003e vsk-\u003ebuffer_max_size) {\n+\t\t\terr = -EINVAL;\n+\t\t\tgoto exit;\n+\t\t}\n \t\tvsk-\u003ebuffer_min_size = val;\n \t\tvsock_update_buffer_size(vsk, transport, vsk-\u003ebuffer_size);\n \t\tbreak;\n"
}

best-expensive

null

{
  "EnableConfigs": [
    "VSOCKETS",
    "VSOCKETS_LOOPBACK"
  ],
  "FocusSymbols": [
    "vsock_connectible_setsockopt"
  ],
  "Reasoning": "The patch adds validation for SO_VM_SOCKETS_BUFFER_MAX_SIZE and SO_VM_SOCKETS_BUFFER_MIN_SIZE socket options in vsock_connectible_setsockopt. This is a functional change in the vsock setsockopt implementation that handles bounds checking for buffer sizes. It is reachable from user space via the setsockopt syscall on vsock sockets.",
  "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).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

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.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
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.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. 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 f7ffc1894441e9af444e6ed2cf55e9f1dc946344
Author: syz-cluster <triage@syzkaller.com>
Date:   Mon Aug 24 10:04:17 2026 +0000

    syz-cluster: applied patch under review

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index a33b2a2d381dc..5faa30ee87453 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -2050,12 +2050,20 @@ static int vsock_connectible_setsockopt(struct socket *sock,
 
 	case SO_VM_SOCKETS_BUFFER_MAX_SIZE:
 		COPY_IN(val);
+		if (val < vsk->buffer_min_size) {
+			err = -EINVAL;
+			goto exit;
+		}
 		vsk->buffer_max_size = val;
 		vsock_update_buffer_size(vsk, transport, vsk->buffer_size);
 		break;
 
 	case SO_VM_SOCKETS_BUFFER_MIN_SIZE:
 		COPY_IN(val);
+		if (val > vsk->buffer_max_size) {
+			err = -EINVAL;
+			goto exit;
+		}
 		vsk->buffer_min_size = val;
 		vsock_update_buffer_size(vsk, transport, vsk->buffer_size);
 		break;

gemini-3.1-pro-preview

null

null

							input: 2132
							output: 33
							thoughts: 182
						

**My Assessment of the vsock Setsockopt Patch**

Okay, so I've got a patch here that's tweaking `net/vmw_vsock/af_vsock.c`. It looks like it's adding some critical validation around `SO_VM_SOCKETS_BUFFER_MAX_SIZE` and `SO_VM_SOCKETS_BUFFER_MIN_SIZE` within the `vsock_connectible_setsockopt` function. Specifically, it's checking to make sure that the proposed maximum buffer size isn't *less* than the current minimum (`val < vsk->buffer_min_size`), and the minimum size isn't *greater* than the current maximum (`val > vsk->buffer_max_size`). This is a solid, functional change to the `setsockopt` implementation in the vsock context. I need to keep an eye on this.

Given this type of change, fuzzing this code is definitely going to be important to ensure there are no unintended consequences.

Now, I need to figure out how vsock is configured. Let's see... I'll check the `net/vmw_vsock/Makefile` and `net/vmw_vsock/Kconfig` files. That's usually the best place to find the relevant config options.

{
  "Expression": "af_vsock",
  "PathPrefix": "net/vmw_vsock/Makefile"
}

{
  "Output": "net/vmw_vsock/Makefile=8=obj-$(CONFIG_VSOCKETS_LOOPBACK) += vsock_loopback.o\nnet/vmw_vsock/Makefile-9-\nnet/vmw_vsock/Makefile:10:vsock-y += af_vsock.o af_vsock_tap.o vsock_addr.o\nnet/vmw_vsock/Makefile-11-vsock-$(CONFIG_BPF_SYSCALL) += vsock_bpf.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 2760
							output: 34
							thoughts: 28
						

Here's my take on the thought process, summarized as you requested:

**Digging into the vSockets Configuration**

Alright, so `CONFIG_VSOCKETS` is the key to understanding the vSockets setup, which I'm familiar with, of course. Time to dive into the kernel configuration files. The next logical step is to examine `net/vmw_vsock/Kconfig`. This file should hold the details, dependencies, and any further configuration options related to virtual sockets specifically for VMware environments. I'm expecting to find the conditions that enable it, any other related features, and possible explanations for why it's configured the way it is. Let's see what gems are hidden in there.

{
  "Expression": "config VSOCKETS",
  "PathPrefix": "net/vmw_vsock/Kconfig"
}

{
  "Output": "net/vmw_vsock/Kconfig-5-\nnet/vmw_vsock/Kconfig:6:config VSOCKETS\nnet/vmw_vsock/Kconfig-7-\ttristate \"Virtual Socket protocol\"\n--\nnet/vmw_vsock/Kconfig-18-\nnet/vmw_vsock/Kconfig:19:config VSOCKETS_DIAG\nnet/vmw_vsock/Kconfig-20-\ttristate \"Virtual Sockets monitoring interface\"\n--\nnet/vmw_vsock/Kconfig-28-\nnet/vmw_vsock/Kconfig:29:config VSOCKETS_LOOPBACK\nnet/vmw_vsock/Kconfig-30-\ttristate \"Virtual Sockets loopback transport\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 3170
							output: 43
							thoughts: 42
						

Okay, here's my take on those thoughts, framed as my own:

**Enabling VSOCKs for Local Communication**

Alright, I'm thinking we need to get `VSOCKETS` and `VSOCKETS_LOOPBACK` enabled. It makes sense for local inter-VM communication, and I'm pretty sure it's the right move for this particular architecture.

Let me just quickly verify that the function name to consider is `vsock_connectible_setsockopt`. Yep, that looks right. Perfect. Now I can move on to the next step.

{
  "Expression": "vsock_connectible_setsockopt",
  "PathPrefix": "net/vmw_vsock/af_vsock.c"
}

{
  "Output": "net/vmw_vsock/af_vsock.c=1966=static void vsock_update_buffer_size(struct vsock_sock *vsk,\n--\nnet/vmw_vsock/af_vsock.c-1982-\nnet/vmw_vsock/af_vsock.c:1983:static int vsock_connectible_setsockopt(struct socket *sock,\nnet/vmw_vsock/af_vsock.c-1984-\t\t\t\t\tint level,\n--\nnet/vmw_vsock/af_vsock.c=2630=static const struct proto_ops vsock_stream_ops = {\n--\nnet/vmw_vsock/af_vsock.c-2642-\t.shutdown = vsock_shutdown,\nnet/vmw_vsock/af_vsock.c:2643:\t.setsockopt = vsock_connectible_setsockopt,\nnet/vmw_vsock/af_vsock.c-2644-\t.getsockopt_iter = vsock_connectible_getsockopt,\n--\nnet/vmw_vsock/af_vsock.c=2652=static const struct proto_ops vsock_seqpacket_ops = {\n--\nnet/vmw_vsock/af_vsock.c-2664-\t.shutdown = vsock_shutdown,\nnet/vmw_vsock/af_vsock.c:2665:\t.setsockopt = vsock_connectible_setsockopt,\nnet/vmw_vsock/af_vsock.c-2666-\t.getsockopt_iter = vsock_connectible_getsockopt,\n"
}

gemini-3.1-pro-preview

null

null

							input: 3809
							output: 137
							thoughts: 352
						

**My Assessment of the vsock setsockopt Implementation**

Okay, let's break this down. My initial observation is that `vsock_connectible_setsockopt` is static, which initially made me consider if it's the right choice. However, I confirmed that it *is* assigned to `proto_ops.setsockopt`, and since it's assigned to a function pointer, it isn't inlined by the compiler. So, the prompt's guidance to prefer non-static, non-inlined entry points is satisfied here – it has a distinct address. We could consider other options, but the prompt is clear. We'll stick with `vsock_connectible_setsockopt`.

No other functions are touched, so `vsock_connectible_setsockopt` is the target.

The change itself is quite straightforward: we're adding validation for `SO_VM_SOCKETS_BUFFER_MAX_SIZE` and `SO_VM_SOCKETS_BUFFER_MIN_SIZE` within this `setsockopt` implementation. This is a functional change for vsock sockets, affecting how the kernel handles buffer size options. User-space programs will reach this validation through the `setsockopt` syscall.

So, in summary, we're adding bounds checking for these specific vsock socket options, and we're doing it in the correct location. It's time to set-results.

{
  "EnableConfigs": [
    "VSOCKETS",
    "VSOCKETS_LOOPBACK"
  ],
  "FocusSymbols": [
    "vsock_connectible_setsockopt"
  ],
  "Reasoning": "The patch adds validation for SO_VM_SOCKETS_BUFFER_MAX_SIZE and SO_VM_SOCKETS_BUFFER_MIN_SIZE socket options in vsock_connectible_setsockopt. This is a functional change in the vsock setsockopt implementation that handles bounds checking for buffer sizes. It is reachable from user space via the setsockopt syscall on vsock sockets.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "VSOCKETS",
    "VSOCKETS_LOOPBACK"
  ],
  "FocusSymbols": [
    "vsock_connectible_setsockopt"
  ],
  "Reasoning": "The patch adds validation for SO_VM_SOCKETS_BUFFER_MAX_SIZE and SO_VM_SOCKETS_BUFFER_MIN_SIZE socket options in vsock_connectible_setsockopt. This is a functional change in the vsock setsockopt implementation that handles bounds checking for buffer sizes. It is reachable from user space via the setsockopt syscall on vsock sockets.",
  "WorthFuzzing": true
}

{
  "WorthFuzzing": true
}

null

best-expensive

null

{
  "KMSANReasoning": "The patch adds bounds checking for socket options SO_VM_SOCKETS_BUFFER_MAX_SIZE and SO_VM_SOCKETS_BUFFER_MIN_SIZE in vsock_connectible_setsockopt. It ensures that the maximum buffer size is not less than the minimum buffer size, and vice versa. The values are copied from user space using the COPY_IN macro, which fully initializes the local variable `val`. The changes only involve integer validation and do not introduce any risk of uninitialized memory usage, kernel-to-user info-leaks, or uninitialized structure fields. Therefore, KMSAN is not applicable here.",
  "NeedsKMSAN": false
}

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.

For your convenience, here is the diff of the changes:
commit f7ffc1894441e9af444e6ed2cf55e9f1dc946344
Author: syz-cluster <triage@syzkaller.com>
Date:   Mon Aug 24 10:04:17 2026 +0000

    syz-cluster: applied patch under review

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index a33b2a2d381dc..5faa30ee87453 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -2050,12 +2050,20 @@ static int vsock_connectible_setsockopt(struct socket *sock,
 
 	case SO_VM_SOCKETS_BUFFER_MAX_SIZE:
 		COPY_IN(val);
+		if (val < vsk->buffer_min_size) {
+			err = -EINVAL;
+			goto exit;
+		}
 		vsk->buffer_max_size = val;
 		vsock_update_buffer_size(vsk, transport, vsk->buffer_size);
 		break;
 
 	case SO_VM_SOCKETS_BUFFER_MIN_SIZE:
 		COPY_IN(val);
+		if (val > vsk->buffer_max_size) {
+			err = -EINVAL;
+			goto exit;
+		}
 		vsk->buffer_min_size = val;
 		vsock_update_buffer_size(vsk, transport, vsk->buffer_size);
 		break;

gemini-3.1-pro-preview

null

null

							input: 2129
							output: 39
							thoughts: 396
						

**KMSAN Concerns: Resolved**

Okay, so this patch is all about adding bounds checking to those `SO_VM_SOCKETS_BUFFER` options within `vsock_connectible_setsockopt`. Specifically, it makes sure the provided values for `max_size` and `min_size` are within reasonable bounds – `val` can't be less than `vsk->buffer_min_size` when setting the maximum, and it can't be greater than `vsk->buffer_max_size` when setting the minimum. My immediate thought was, does this introduce or expose any potential uninitialized memory vulnerabilities?

No, the code is just doing integer comparisons. KMSAN flags uninitialized memory, but this just does bounds checking based on what's provided. KMSAN is for unitialized, while KASAN is for other issues like out-of-bounds access. This has nothing to do with unitialized memory.

Hold on, I see `COPY_IN(val)` in there. That macro copies data from user space. I remember that KMSAN flags memory, but user space is considered initialized. But, that macro might be calling either `copy_from_user` or `get_user` and these can cause a crash.

The patch includes simple checks:

```c
		if (val < vsk->buffer_min_size) {
			err = -EINVAL;
			goto exit;
		}
```

and

```c
		if (val > vsk->buffer_max_size) {
			err = -EINVAL;
			goto exit;
		}
```

This is straightforward integer validation, and there's no way this exposes an uninitialized memory issue. So I'll mark `NeedsKMSAN=false`.

I will do a quick check on the `COPY_IN` macro just to double-check.

{
  "Expression": "#define COPY_IN",
  "PathPrefix": "net/vmw_vsock/af_vsock.c"
}

{
  "Output": "net/vmw_vsock/af_vsock.c=1983=static int vsock_connectible_setsockopt(struct socket *sock,\n--\nnet/vmw_vsock/af_vsock.c-1997-\nnet/vmw_vsock/af_vsock.c:1998:#define COPY_IN(_v)                                       \\\nnet/vmw_vsock/af_vsock.c-1999-\tdo {\t\t\t\t\t\t  \\\n"
}

gemini-3.1-pro-preview

null

null

							input: 3101
							output: 43
							thoughts: 12
						

Here's my attempt at summarizing the thought process, tailored for an expert audience:

**Diving into the COPY_IN Definition**

Alright, let's just make absolutely sure we're on the same page and that there's no subtle nuance I'm missing. Before proceeding with my current task, I need to thoroughly re-examine the definitive meaning of `COPY_IN`. It’s a term we use frequently, but a refresher, a deep dive into the official documentation or standard specifications, is always warranted, given the potential impact this concept has across the entire system. I don't want to rely on assumed knowledge or a potentially incomplete mental model, especially when interacting with complex systems. Let's make sure I have an ironclad understanding of the operation, its parameters, and any potential side effects. That foundation is critical for any downstream decisions and actions. The specifics here are incredibly important. I'll need to double check how data is transferred, any associated access restrictions, and implications regarding memory management.

{
  "File": "net/vmw_vsock/af_vsock.c",
  "FirstLine": 1997,
  "LineCount": 15
}

{
  "Contents": "1997:\t\n1998:\t#define COPY_IN(_v)                                       \\\n1999:\t\tdo {\t\t\t\t\t\t  \\\n2000:\t\t\tif (optlen \u003c sizeof(_v)) {\t\t  \\\n2001:\t\t\t\terr = -EINVAL;\t\t\t  \\\n2002:\t\t\t\tgoto exit;\t\t\t  \\\n2003:\t\t\t}\t\t\t\t\t  \\\n2004:\t\t\tif (copy_from_sockptr(\u0026_v, optval, sizeof(_v)) != 0) {\t\\\n2005:\t\t\t\terr = -EFAULT;\t\t\t\t\t\\\n2006:\t\t\t\tgoto exit;\t\t\t\t\t\\\n2007:\t\t\t}\t\t\t\t\t\t\t\\\n2008:\t\t} while (0)\n2009:\t\n2010:\t\terr = 0;\n2011:\t\tsk = sock-\u003esk;\n"
}

gemini-3.1-pro-preview

null

null

							input: 3591
							output: 156
							thoughts: 46
						

**My Assessment of the Patch's Impact**

Okay, so I've taken a look at this patch. It appears the core function, `COPY_IN`, is responsible for initializing `val` directly from user space. The patch itself is quite focused; it's simply adding bounds checking to the existing `val` value. Considering how `val` gets its initial value, and with the added bounds checks, I'm confident there is no risk of exposing uninitialized memory. With this assessment, I'm going to set `NeedsKMSAN=false`.

{
  "KMSANReasoning": "The patch adds bounds checking for socket options SO_VM_SOCKETS_BUFFER_MAX_SIZE and SO_VM_SOCKETS_BUFFER_MIN_SIZE in vsock_connectible_setsockopt. It ensures that the maximum buffer size is not less than the minimum buffer size, and vice versa. The values are copied from user space using the COPY_IN macro, which fully initializes the local variable `val`. The changes only involve integer validation and do not introduce any risk of uninitialized memory usage, kernel-to-user info-leaks, or uninitialized structure fields. Therefore, KMSAN is not applicable here.",
  "NeedsKMSAN": false
}

{
  "KMSANReasoning": "The patch adds bounds checking for socket options SO_VM_SOCKETS_BUFFER_MAX_SIZE and SO_VM_SOCKETS_BUFFER_MIN_SIZE in vsock_connectible_setsockopt. It ensures that the maximum buffer size is not less than the minimum buffer size, and vice versa. The values are copied from user space using the COPY_IN macro, which fully initializes the local variable `val`. The changes only involve integer validation and do not introduce any risk of uninitialized memory usage, kernel-to-user info-leaks, or uninitialized structure fields. Therefore, KMSAN is not applicable here.",
  "NeedsKMSAN": false
}