CVE: CVE-2024-27018

Descrizione: This log snippet provides a detailed trace of a kernel event, likely related to network interface handling. Let’s break down what’s happening: **1. Context: `br_nf_hook_thresh`** * **`br_nf_hook_thresh`**: This is a critical breakpoint. It indicates that the kernel is examining the `br_nf_hook_thresh` function, which is responsible for handling events related to network interfaces. This is a standard debugging mechanism. **2. Trace Events (Key Observations)** * **`__napi_build_skb`**: This function is crucial. It’s a kernel function that builds a “skb” (stack buffer) – a data structure used for efficient communication between kernel components. The `skb` contains information about events that are being processed. * **`__netif_receive_skb_core`**: This function is the *core* of the trace. It’s responsible for receiving and processing events from the network interface stack. It’s the most important point of interest. * **`br_nf_hook_slow`**: This function is a slow function that is called when the kernel is processing the events. * **`br_handle_local_finish`**: This function is called when the kernel has finished processing the local event. * **`__netif_receive_skb_list_core`**: This function is the core of the trace. It’s responsible for receiving and processing events from the network interface stack. It’s the most important point of interest. **3. The Core of the Trace – `br_handle_local_finish`** The trace shows a series of calls to `br_handle_local_finish`. This function is the *heart* of the event. It’s likely that the kernel is receiving and processing events related to the network interface. The log indicates that the event is being handled by the `br_handle_local_finish` function. **4. The `__netif_receive_skb_list_core`** This function is the *core* of the trace. It’s responsible for receiving and processing events from the network interface stack. It’s the most important point of interest. **5. The `__napi_build_skb`** This function is a critical function that builds the skb. **Possible Interpretations & Implications** * **Network Interface Issues:** The trace strongly suggests a problem with the network interface. The kernel is receiving events, and the `br_handle_local_finish` function is handling them. This could indicate a network error, a configuration issue, or a driver problem. * **Debugging:** This log is a valuable debugging tool. It allows you to examine the state of the kernel’s network interface handling process. * **Root Cause Analysis:** If the network interface isn’t behaving as expected, this trace can help pinpoint the root cause. **In summary, the log is a detailed trace of a kernel event related to network interface handling, highlighting a potential issue that needs investigation.** **What to Do Next (Based on this Log)** 1. **Investigate Network Interface:** Check the status of the network interface (e.g., using `ip link show` or `ifconfig`). 2. **Examine Network Configuration:** Verify the network configuration (IP address, subnet mask, gateway, DNS settings) is correct. 3. **Check Driver:** Ensure the network driver is up-to-date and functioning correctly. 4. **Review Kernel Logs:** Look for other kernel logs that might provide more context. 5. **Consider Recent Changes:** Did anything change recently (e.g., driver updates, configuration changes)? Let me know if you’d like me to elaborate on any of these points or provide more specific troubleshooting steps!

Vettore di attacco

Riferimenti esterni

• https://git.kernel.org/stable/c/dceb683ab87ca3666a9bb5c0158528b646faedc4
• https://git.kernel.org/stable/c/b13db0d16bc7b2a52abcf5cb71334f63faa5dbd6
• https://git.kernel.org/stable/c/3f59ac29dea0921637053908fe99268d157bbb9d
• https://git.kernel.org/stable/c/43193174510ea4f3ce09b796e559a2fd9f148615
• https://git.kernel.org/stable/c/751de2012eafa4d46d8081056761fa0e9cc8a178

Prodotti interessati

• Linux – Linux
• Linux – Linux

Relazioni con altri prodotti

Produttore:Linux
Prodotto: Linux
Anno: 2024
CWE:
CVSS: 0.0