{"id":"CVE-2022-50545","summary":"r6040: Fix kmemleak in probe and remove","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nr6040: Fix kmemleak in probe and remove\n\nThere is a memory leaks reported by kmemleak:\n\n  unreferenced object 0xffff888116111000 (size 2048):\n    comm \"modprobe\", pid 817, jiffies 4294759745 (age 76.502s)\n    hex dump (first 32 bytes):\n      00 c4 0a 04 81 88 ff ff 08 10 11 16 81 88 ff ff  ................\n      08 10 11 16 81 88 ff ff 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003cffffffff815bcd82\u003e] kmalloc_trace+0x22/0x60\n      [\u003cffffffff827e20ee\u003e] phy_device_create+0x4e/0x90\n      [\u003cffffffff827e6072\u003e] get_phy_device+0xd2/0x220\n      [\u003cffffffff827e7844\u003e] mdiobus_scan+0xa4/0x2e0\n      [\u003cffffffff827e8be2\u003e] __mdiobus_register+0x482/0x8b0\n      [\u003cffffffffa01f5d24\u003e] r6040_init_one+0x714/0xd2c [r6040]\n      ...\n\nThe problem occurs in probe process as follows:\n  r6040_init_one:\n    mdiobus_register\n      mdiobus_scan    \u003c- alloc and register phy_device,\n                         the reference count of phy_device is 3\n    r6040_mii_probe\n      phy_connect     \u003c- connect to the first phy_device,\n                         so the reference count of the first\n                         phy_device is 4, others are 3\n    register_netdev   \u003c- fault inject succeeded, goto error handling path\n\n    // error handling path\n    err_out_mdio_unregister:\n      mdiobus_unregister(lp-\u003emii_bus);\n    err_out_mdio:\n      mdiobus_free(lp-\u003emii_bus);    \u003c- the reference count of the first\n                                       phy_device is 1, it is not released\n                                       and other phy_devices are released\n  // similarly, the remove process also has the same problem\n\nThe root cause is traced to the phy_device is not disconnected when\nremoves one r6040 device in r6040_remove_one() or on error handling path\nafter r6040_mii probed successfully. In r6040_mii_probe(), a net ethernet\ndevice is connected to the first PHY device of mii_bus, in order to\nnotify the connected driver when the link status changes, which is the\ndefault behavior of the PHY infrastructure to handle everything.\nTherefore the phy_device should be disconnected when removes one r6040\ndevice or on error handling path.\n\nFix it by adding phy_disconnect() when removes one r6040 device or on\nerror handling path after r6040_mii probed successfully.","modified":"2026-04-02T08:28:36.241935Z","published":"2025-10-07T15:21:09.288Z","related":["SUSE-SU-2025:4111-1","SUSE-SU-2025:4139-1","SUSE-SU-2025:4149-1","SUSE-SU-2025:4320-1","SUSE-SU-2025:4515-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50545.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2ce242e1b9ad31c1f68496b3548e407a8cb2c07d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3d5f83a62e8235d235534b3dc6f197d8a822c269"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5944c25c67de54e0aa53623e1e1af3bf8b16ed44"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7e43039a49c2da45edc1d9d7c9ede4003ab45a5f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9b5b50329e2e966831a7237dd6949e7b5362a49a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a04707f4596952049da05756c27398c34d9a1d36"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ad2c8f25457ca9a81e7e958148cbc26600ce3071"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0a61359026b57a287a48fbb4ba1d097023eca3e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4448816e6a565e08236a6009c6bf48c6836cdfd"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50545.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50545"},{"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":"3831861b4ad8fd0ad7110048eb3e155628799d2b"},{"fixed":"a04707f4596952049da05756c27398c34d9a1d36"},{"fixed":"b4448816e6a565e08236a6009c6bf48c6836cdfd"},{"fixed":"2ce242e1b9ad31c1f68496b3548e407a8cb2c07d"},{"fixed":"b0a61359026b57a287a48fbb4ba1d097023eca3e"},{"fixed":"3d5f83a62e8235d235534b3dc6f197d8a822c269"},{"fixed":"9b5b50329e2e966831a7237dd6949e7b5362a49a"},{"fixed":"ad2c8f25457ca9a81e7e958148cbc26600ce3071"},{"fixed":"5944c25c67de54e0aa53623e1e1af3bf8b16ed44"},{"fixed":"7e43039a49c2da45edc1d9d7c9ede4003ab45a5f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50545.json"}}],"schema_version":"1.7.5"}