{"id":"CVE-2022-50084","summary":"dm raid: fix address sanitizer warning in raid_status","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm raid: fix address sanitizer warning in raid_status\n\nThere is this warning when using a kernel with the address sanitizer\nand running this testsuite:\nhttps://gitlab.com/cki-project/kernel-tests/-/tree/main/storage/swraid/scsi_raid\n\n==================================================================\nBUG: KASAN: slab-out-of-bounds in raid_status+0x1747/0x2820 [dm_raid]\nRead of size 4 at addr ffff888079d2c7e8 by task lvcreate/13319\nCPU: 0 PID: 13319 Comm: lvcreate Not tainted 5.18.0-0.rc3.\u003csnip\u003e #1\nHardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x6a/0x9c\n print_address_description.constprop.0+0x1f/0x1e0\n print_report.cold+0x55/0x244\n kasan_report+0xc9/0x100\n raid_status+0x1747/0x2820 [dm_raid]\n dm_ima_measure_on_table_load+0x4b8/0xca0 [dm_mod]\n table_load+0x35c/0x630 [dm_mod]\n ctl_ioctl+0x411/0x630 [dm_mod]\n dm_ctl_ioctl+0xa/0x10 [dm_mod]\n __x64_sys_ioctl+0x12a/0x1a0\n do_syscall_64+0x5b/0x80\n\nThe warning is caused by reading conf-\u003emax_nr_stripes in raid_status. The\ncode in raid_status reads mddev-\u003eprivate, casts it to struct r5conf and\nreads the entry max_nr_stripes.\n\nHowever, if we have different raid type than 4/5/6, mddev-\u003eprivate\ndoesn't point to struct r5conf; it may point to struct r0conf, struct\nr1conf, struct r10conf or struct mpconf. If we cast a pointer to one\nof these structs to struct r5conf, we will be reading invalid memory\nand KASAN warns about it.\n\nFix this bug by reading struct r5conf only if raid type is 4, 5 or 6.","modified":"2026-04-03T13:14:35.032068Z","published":"2025-06-18T11:02:25.998Z","related":["SUSE-SU-2025:02264-1","SUSE-SU-2025:02308-1","SUSE-SU-2025:02320-1","SUSE-SU-2025:02321-1","SUSE-SU-2025:02322-1","SUSE-SU-2025:02334-1","SUSE-SU-2025:02537-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50084.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1ae0ebfb576b72c2ef400917a5484ebe7892d80b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1fbeea217d8f297fe0e0956a1516d14ba97d0396"},{"type":"WEB","url":"https://git.kernel.org/stable/c/49dba30638e091120256a9e89125340795f034dc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4c233811a49578634d10a5e70a9dfa569d451e94"},{"type":"WEB","url":"https://git.kernel.org/stable/c/90b006da40dd42285b24dd3c940d2c32aca9a70b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4c6c07c92b6cba2bf3cb2dfa722debeaf8a8abe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b856ce5f4b55f752144baf17e9d5c415072652c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cb583ca6125ac64c98e9d65128e95ebb5be7d322"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d8971b595d7adac3421c21f59918241f1574061e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50084.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50084"},{"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":"3a1c1ef2fd62087c3d6521de217ddb9360776658"},{"fixed":"1ae0ebfb576b72c2ef400917a5484ebe7892d80b"},{"fixed":"90b006da40dd42285b24dd3c940d2c32aca9a70b"},{"fixed":"b856ce5f4b55f752144baf17e9d5c415072652c5"},{"fixed":"cb583ca6125ac64c98e9d65128e95ebb5be7d322"},{"fixed":"49dba30638e091120256a9e89125340795f034dc"},{"fixed":"4c233811a49578634d10a5e70a9dfa569d451e94"},{"fixed":"d8971b595d7adac3421c21f59918241f1574061e"},{"fixed":"b4c6c07c92b6cba2bf3cb2dfa722debeaf8a8abe"},{"fixed":"1fbeea217d8f297fe0e0956a1516d14ba97d0396"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50084.json"}}],"schema_version":"1.7.5"}