{"id":"CVE-2022-50477","summary":"rtc: class: Fix potential memleak in devm_rtc_allocate_device()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: class: Fix potential memleak in devm_rtc_allocate_device()\n\ndevm_rtc_allocate_device() will alloc a rtc_device first, and then run\ndev_set_name(). If dev_set_name() failed, the rtc_device will memleak.\nMove devm_add_action_or_reset() in front of dev_set_name() to prevent\nmemleak.\n\nunreferenced object 0xffff888110a53000 (size 2048):\n  comm \"python3\", pid 470, jiffies 4296078308 (age 58.882s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 08 30 a5 10 81 88 ff ff  .........0......\n    08 30 a5 10 81 88 ff ff 00 00 00 00 00 00 00 00  .0..............\n  backtrace:\n    [\u003c000000004aac0364\u003e] kmalloc_trace+0x21/0x110\n    [\u003c000000000ff02202\u003e] devm_rtc_allocate_device+0xd4/0x400\n    [\u003c000000001bdf5639\u003e] devm_rtc_device_register+0x1a/0x80\n    [\u003c00000000351bf81c\u003e] rx4581_probe+0xdd/0x110 [rtc_rx4581]\n    [\u003c00000000f0eba0ae\u003e] spi_probe+0xde/0x130\n    [\u003c00000000bff89ee8\u003e] really_probe+0x175/0x3f0\n    [\u003c00000000128e8d84\u003e] __driver_probe_device+0xe6/0x170\n    [\u003c00000000ee5bf913\u003e] device_driver_attach+0x32/0x80\n    [\u003c00000000f3f28f92\u003e] bind_store+0x10b/0x1a0\n    [\u003c000000009ff812d8\u003e] drv_attr_store+0x49/0x70\n    [\u003c000000008139c323\u003e] sysfs_kf_write+0x8d/0xb0\n    [\u003c00000000b6146e01\u003e] kernfs_fop_write_iter+0x214/0x2d0\n    [\u003c00000000ecbe3895\u003e] vfs_write+0x61a/0x7d0\n    [\u003c00000000aa2196ea\u003e] ksys_write+0xc8/0x190\n    [\u003c0000000046a600f5\u003e] do_syscall_64+0x37/0x90\n    [\u003c00000000541a336f\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd","modified":"2026-03-20T11:47:29.488120Z","published":"2025-10-04T15:16:37.654Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50477.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0bcfc8fd3e596994f527b46730579428b3a4fa5f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/59457a0f079eae19aaf322b3cc1c8ba66f55c5f3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/60da73808298ff2cfa9f165d55eb3d7aa7078601"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50477.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50477"},{"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":"24d23181e43d72ca692a479e70dfe5b0b5dd33f1"},{"fixed":"0bcfc8fd3e596994f527b46730579428b3a4fa5f"},{"fixed":"59457a0f079eae19aaf322b3cc1c8ba66f55c5f3"},{"fixed":"60da73808298ff2cfa9f165d55eb3d7aa7078601"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50477.json"}}],"schema_version":"1.7.5"}