{"id":"CVE-2025-38720","summary":"net: hibmcge: fix rtnl deadlock issue","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hibmcge: fix rtnl deadlock issue\n\nCurrently, the hibmcge netdev acquires the rtnl_lock in\npci_error_handlers.reset_prepare() and releases it in\npci_error_handlers.reset_done().\n\nHowever, in the PCI framework:\npci_reset_bus - __pci_reset_slot - pci_slot_save_and_disable_locked -\n pci_dev_save_and_disable - err_handler-\u003ereset_prepare(dev);\n\nIn pci_slot_save_and_disable_locked():\n\tlist_for_each_entry(dev, &slot-\u003ebus-\u003edevices, bus_list) {\n\t\tif (!dev-\u003eslot || dev-\u003eslot!= slot)\n\t\t\tcontinue;\n\t\tpci_dev_save_and_disable(dev);\n\t\tif (dev-\u003esubordinate)\n\t\t\tpci_bus_save_and_disable_locked(dev-\u003esubordinate);\n\t}\n\nThis will iterate through all devices under the current bus and execute\nerr_handler-\u003ereset_prepare(), causing two devices of the hibmcge driver\nto sequentially request the rtnl_lock, leading to a deadlock.\n\nSince the driver now executes netif_device_detach()\nbefore the reset process, it will not concurrently with\nother netdev APIs, so there is no need to hold the rtnl_lock now.\n\nTherefore, this patch removes the rtnl_lock during the reset process and\nadjusts the position of HBG_NIC_STATE_RESETTING to ensure\nthat multiple resets are not executed concurrently.","modified":"2026-04-02T12:48:05.599729Z","published":"2025-09-04T15:33:14.057Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38720.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1343a8994ca7dba78f5dd818e89d68331c21c35d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c875503a9b9082928d7d3fc60b5400d16fbfae4e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d85a6346fd6f595c4914205762d0cdf35c004a5e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38720.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38720"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3f5a61f6d504f55ed1a36cce044d5123d508721f"},{"fixed":"d85a6346fd6f595c4914205762d0cdf35c004a5e"},{"fixed":"1343a8994ca7dba78f5dd818e89d68331c21c35d"},{"fixed":"c875503a9b9082928d7d3fc60b5400d16fbfae4e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38720.json"}}],"schema_version":"1.7.5"}