CVE-2023-53509 in Linux
Сводка
по VulDB • 07.06.2026
Based on the kernel stack trace provided, here is an analysis of the issue, its root cause, and recommended actions.
### **Summary** The system experienced a **kernel panic** (or severe error) triggered by the **QED/QEDE driver** (QLogic Ethernet driver) when an `ethtool` command was executed. The crash occurred while the driver was attempting to **dump MCP (Management Controller) trace data** to gather diagnostic information.
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### **Detailed Analysis**
#### **1. Triggering Event** - **Command:** `ethtool` (likely `ethtool -i <interface>` or similar). - **System Call:** `SyS_ioctl` → `dev_ethtool` → `qede_get_regs_len`. - **Context:** The user or a monitoring tool requested driver/driver info or register dump via `ethtool`.
#### **2. Call Chain Breakdown** The stack trace shows the following sequence: 1. **`dev_ethtool`**: The kernel's generic ethtool handler. 2. **`qede_get_regs_len`**: The QEDE driver's function to determine the size of the register dump buffer. 3. **`qed_dbg_all_data_size`**: Calculates the total size of debug data. 4. **`qed_dbg_feature_size`**: Queries the size of specific debug features. 5. **`qed_dbg_mcp_trace_get_dump_buf_size`**: Attempts to get the size of the **MCP trace buffer**. 6. **`qed_mcp_trace_dump`**: Initiates the MCP trace dump process. 7. **`qed_mcp_nvm_rd_cmd`**: Sends a command to read NVM (Non-Volatile Memory) or internal memory via the MCP. 8. **`qed_mcp_cmd_and_union`**: The low-level function that communicates with the Management Controller (MCP). 9. **`BUG()` or `WARN_ON()`**: The crash occurs here (`[<ffffffffa04d45ff>] qed_mcp_cmd_and_union+0x36f/0x7d0`).
#### **3. Root Cause** The crash happens in **`qed_mcp_cmd_and_union`**, which is responsible for sending commands to the NIC's Management Controller (MCP). This suggests one of the following: - **MCP Unresponsive/Hung:** The MCP did not respond to the command within the expected timeout, causing the driver to trigger a BUG/WARN. - **Firmware Bug:** The NIC firmware may have a bug in handling the trace dump request, leading to an invalid state or assertion failure. - **Driver Bug:** The driver may be sending an invalid command or misinterpreting the MCP's response. - **Hardware Issue:** Rarely, a hardware fault in the NIC could cause the MCP to behave unpredictably.
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### **Recommended Actions**
#### **1. Immediate Workaround** - **Avoid `ethtool` debug commands:** Do not run `ethtool -d`, `ethtool -i`, or other commands that trigger driver debug dumps until the issue is resolved. - **Reboot the system:** If the system is still running, a reboot may clear the stuck MCP state. However, if the MCP is hung, the NIC may remain unresponsive after reboot.
#### **2. Long-Term Fixes** - **Update NIC Firmware:** Check for newer firmware versions for your QLogic/QED NIC. Firmware updates often fix MCP communication bugs. - **Update Driver:** Ensure you are using the latest version of the `qed`/`qede` driver from the vendor or your distribution's kernel. - **Check for Known Bugs:** Search for this specific stack trace in: - QLogic/Broadcom support forums. - Linux kernel bugzilla. - Your distribution's bug tracker (e.g., Red Hat Bugzilla, Ubuntu Launchpad).
#### **3. Debugging Steps** - **Collect Logs:** Save the full `dmesg` output, including the panic message and any preceding warnings. - **Check NIC Health:** Use `lspci -vvv` to check for PCIe errors or link issues. - **Test with Different NIC:** If possible, test with a different NIC to rule out hardware failure.
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### **Example Command to Check NIC Firmware** ```bash # Check current firmware version ethtool -i <interface_name>
# Check for firmware updates (vendor-specific) # For QLogic/QED, you may need to use the vendor's firmware update tool ```
### **Conclusion** This is a **driver/firmware interaction bug** triggered by `ethtool`. The most likely fix is updating the NIC firmware and/or driver. If the issue persists, contact QLogic/B
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