In the Linux kernel, the following vulnerability has been resolved:
net: hibmcge: fix rtnl deadlock issue
Currently, the hibmcge netdev acquires the rtnl_lock in
pci_error_handlers.reset_prepare() and releases it in
pci_error_handlers.reset_done().
However, in the PCI framework:
pci_reset_bus - __pci_reset_slot - pci_slot_save_and_disable_locked -
pci_dev_save_and_disable - err_handler->reset_prepare(dev);
In pci_slot_save_and_disable_locked():
list_for_each_entry(dev, &slot->bus->devices, bus_list) {
if (!dev->slot || dev->slot!= slot)
continue;
pci_dev_save_and_disable(dev);
if (dev->subordinate)
pci_bus_save_and_disable_locked(dev->subordinate);
}
This will iterate through all devices under the current bus and execute
err_handler->reset_prepare(), causing two devices of the hibmcge driver
to sequentially request the rtnl_lock, leading to a deadlock.
Since the driver now executes netif_device_detach()
before the reset process, it will not concurrently with
other netdev APIs, so there is no need to hold the rtnl_lock now.
Therefore, this patch removes the rtnl_lock during the reset process and
adjusts the position of HBG_NIC_STATE_RESETTING to ensure
that multiple resets are not executed concurrently.
References
Configurations
Configuration 1 (hide)
|
History
25 Nov 2025, 21:47
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/1343a8994ca7dba78f5dd818e89d68331c21c35d - Patch | |
| References | () https://git.kernel.org/stable/c/c875503a9b9082928d7d3fc60b5400d16fbfae4e - Patch | |
| References | () https://git.kernel.org/stable/c/d85a6346fd6f595c4914205762d0cdf35c004a5e - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-667 |
Information
Published : 2025-09-04 16:15
Updated : 2025-11-25 21:47
NVD link : CVE-2025-38720
Mitre link : CVE-2025-38720
CVE.ORG link : CVE-2025-38720
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking