{"id":"CVE-2023-52730","summary":"mmc: sdio: fix possible resource leaks in some error paths","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: sdio: fix possible resource leaks in some error paths\n\nIf sdio_add_func() or sdio_init_func() fails, sdio_remove_func() can\nnot release the resources, because the sdio function is not presented\nin these two cases, it won't call of_node_put() or put_device().\n\nTo fix these leaks, make sdio_func_present() only control whether\ndevice_del() needs to be called or not, then always call of_node_put()\nand put_device().\n\nIn error case in sdio_init_func(), the reference of 'card-\u003edev' is\nnot get, to avoid redundant put in sdio_free_func_cis(), move the\nget_device() to sdio_alloc_func() and put_device() to sdio_release_func(),\nit can keep the get/put function be balanced.\n\nWithout this patch, while doing fault inject test, it can get the\nfollowing leak reports, after this fix, the leak is gone.\n\nunreferenced object 0xffff888112514000 (size 2048):\n  comm \"kworker/3:2\", pid 65, jiffies 4294741614 (age 124.774s)\n  hex dump (first 32 bytes):\n    00 e0 6f 12 81 88 ff ff 60 58 8d 06 81 88 ff ff  ..o.....`X......\n    10 40 51 12 81 88 ff ff 10 40 51 12 81 88 ff ff  .@Q......@Q.....\n  backtrace:\n    [\u003c000000009e5931da\u003e] kmalloc_trace+0x21/0x110\n    [\u003c000000002f839ccb\u003e] mmc_alloc_card+0x38/0xb0 [mmc_core]\n    [\u003c0000000004adcbf6\u003e] mmc_sdio_init_card+0xde/0x170 [mmc_core]\n    [\u003c000000007538fea0\u003e] mmc_attach_sdio+0xcb/0x1b0 [mmc_core]\n    [\u003c00000000d4fdeba7\u003e] mmc_rescan+0x54a/0x640 [mmc_core]\n\nunreferenced object 0xffff888112511000 (size 2048):\n  comm \"kworker/3:2\", pid 65, jiffies 4294741623 (age 124.766s)\n  hex dump (first 32 bytes):\n    00 40 51 12 81 88 ff ff e0 58 8d 06 81 88 ff ff  .@Q......X......\n    10 10 51 12 81 88 ff ff 10 10 51 12 81 88 ff ff  ..Q.......Q.....\n  backtrace:\n    [\u003c000000009e5931da\u003e] kmalloc_trace+0x21/0x110\n    [\u003c00000000fcbe706c\u003e] sdio_alloc_func+0x35/0x100 [mmc_core]\n    [\u003c00000000c68f4b50\u003e] mmc_attach_sdio.cold.18+0xb1/0x395 [mmc_core]\n    [\u003c00000000d4fdeba7\u003e] mmc_rescan+0x54a/0x640 [mmc_core]","modified":"2026-04-02T09:43:14.618553Z","published":"2024-05-21T15:22:56.633Z","related":["ALSA-2024:5102","SUSE-SU-2024:1979-1","SUSE-SU-2024:1983-1","SUSE-SU-2024:2008-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2184-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52730.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1e06cf04239e202248c8fa356bf11449dc73cfbd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/30716d9f0fa1766e522cf24c8a456244e4fc9931"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5c7858adada31dbed042448cff6997dd6efc472a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/605d9fb9556f8f5fb4566f4df1480f280f308ded"},{"type":"WEB","url":"https://git.kernel.org/stable/c/761db46b29b496946046d8cb33c7ea6de6bef36e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/92ff03c2563c9b57a027c744750f3b7d2f261c58"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f855d31bb38d663c3ba672345d7cce9324ba3b72"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52730.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52730"},{"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":"3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5"},{"fixed":"92ff03c2563c9b57a027c744750f3b7d2f261c58"},{"fixed":"5c7858adada31dbed042448cff6997dd6efc472a"},{"fixed":"761db46b29b496946046d8cb33c7ea6de6bef36e"},{"fixed":"30716d9f0fa1766e522cf24c8a456244e4fc9931"},{"fixed":"1e06cf04239e202248c8fa356bf11449dc73cfbd"},{"fixed":"f855d31bb38d663c3ba672345d7cce9324ba3b72"},{"fixed":"605d9fb9556f8f5fb4566f4df1480f280f308ded"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52730.json"}}],"schema_version":"1.7.5"}