{"id":"CVE-2024-56624","summary":"iommufd: Fix out_fput in iommufd_fault_alloc()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Fix out_fput in iommufd_fault_alloc()\n\nAs fput() calls the file-\u003ef_op-\u003erelease op, where fault obj and ictx are\ngetting released, there is no need to release these two after fput() one\nmore time, which would result in imbalanced refcounts:\n  refcount_t: decrement hit 0; leaking memory.\n  WARNING: CPU: 48 PID: 2369 at lib/refcount.c:31 refcount_warn_saturate+0x60/0x230\n  Call trace:\n   refcount_warn_saturate+0x60/0x230 (P)\n   refcount_warn_saturate+0x60/0x230 (L)\n   iommufd_fault_fops_release+0x9c/0xe0 [iommufd]\n  ...\n  VFS: Close: file count is 0 (f_op=iommufd_fops [iommufd])\n  WARNING: CPU: 48 PID: 2369 at fs/open.c:1507 filp_flush+0x3c/0xf0\n  Call trace:\n   filp_flush+0x3c/0xf0 (P)\n   filp_flush+0x3c/0xf0 (L)\n   __arm64_sys_close+0x34/0x98\n  ...\n  imbalanced put on file reference count\n  WARNING: CPU: 48 PID: 2369 at fs/file.c:74 __file_ref_put+0x100/0x138\n  Call trace:\n   __file_ref_put+0x100/0x138 (P)\n   __file_ref_put+0x100/0x138 (L)\n   __fput_sync+0x4c/0xd0\n\nDrop those two lines to fix the warnings above.","modified":"2026-04-02T12:24:57.661520Z","published":"2024-12-27T14:51:27.318Z","related":["USN-7379-2","USN-7380-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56624.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af7f4780514f850322b2959032ecaa96e4b26472"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56624.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56624"},{"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":"07838f7fd529c8a6de44b601d4b7057e6c8d36ed"},{"fixed":"2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d"},{"fixed":"af7f4780514f850322b2959032ecaa96e4b26472"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56624.json"}}],"schema_version":"1.7.5"}