{"id":"CVE-2024-53167","summary":"nfs/blocklayout: Don't attempt unregister for invalid block device","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfs/blocklayout: Don't attempt unregister for invalid block device\n\nSince commit d869da91cccb (\"nfs/blocklayout: Fix premature PR key\nunregistration\") an unmount of a pNFS SCSI layout-enabled NFS may\ndereference a NULL block_device in:\n\n  bl_unregister_scsi+0x16/0xe0 [blocklayoutdriver]\n  bl_free_device+0x70/0x80 [blocklayoutdriver]\n  bl_free_deviceid_node+0x12/0x30 [blocklayoutdriver]\n  nfs4_put_deviceid_node+0x60/0xc0 [nfsv4]\n  nfs4_deviceid_purge_client+0x132/0x190 [nfsv4]\n  unset_pnfs_layoutdriver+0x59/0x60 [nfsv4]\n  nfs4_destroy_server+0x36/0x70 [nfsv4]\n  nfs_free_server+0x23/0xe0 [nfs]\n  deactivate_locked_super+0x30/0xb0\n  cleanup_mnt+0xba/0x150\n  task_work_run+0x59/0x90\n  syscall_exit_to_user_mode+0x217/0x220\n  do_syscall_64+0x8e/0x160\n\nThis happens because even though we were able to create the\nnfs4_deviceid_node, the lookup for the device was unable to attach the\nblock device to the pnfs_block_dev.\n\nIf we never found a block device to register, we can avoid this case with\nthe PNFS_BDEV_REGISTERED flag.  Move the deref behind the test for the\nflag.","modified":"2026-04-02T12:22:55.128587Z","published":"2024-12-27T13:49:13.201Z","related":["USN-7276-1","USN-7277-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53167.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3402704a424f34bbcca7f4a4503859357f422217"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3a4ce14d9a6b868e0787e4582420b721c04ee41e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/faa4bacfaeed827a4ca8cb8529a3ce65a9e8ef46"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53167.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-53167"},{"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":"d869da91cccb90320e101a2758f1e2b3803ade5c"},{"fixed":"3402704a424f34bbcca7f4a4503859357f422217"},{"fixed":"faa4bacfaeed827a4ca8cb8529a3ce65a9e8ef46"},{"fixed":"3a4ce14d9a6b868e0787e4582420b721c04ee41e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53167.json"}}],"schema_version":"1.7.5"}