{"id":"CVE-2024-26775","summary":"aoe: avoid potential deadlock at set_capacity","details":"In the Linux kernel, the following vulnerability has been resolved:\n\naoe: avoid potential deadlock at set_capacity\n\nMove set_capacity() outside of the section procected by (&d-\u003elock).\nTo avoid possible interrupt unsafe locking scenario:\n\n        CPU0                    CPU1\n        ----                    ----\n[1] lock(&bdev-\u003ebd_size_lock);\n                                local_irq_disable();\n                            [2] lock(&d-\u003elock);\n                            [3] lock(&bdev-\u003ebd_size_lock);\n   \u003cInterrupt\u003e\n[4]  lock(&d-\u003elock);\n\n  *** DEADLOCK ***\n\nWhere [1](&bdev-\u003ebd_size_lock) hold by zram_add()-\u003eset_capacity().\n[2]lock(&d-\u003elock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc()\nis trying to acquire [3](&bdev-\u003ebd_size_lock) at set_capacity() call.\nIn this situation an attempt to acquire [4]lock(&d-\u003elock) from\naoecmd_cfg_rsp() will lead to deadlock.\n\nSo the simplest solution is breaking lock dependency\n[2](&d-\u003elock) -\u003e [3](&bdev-\u003ebd_size_lock) by moving set_capacity()\noutside.","modified":"2026-04-02T10:05:55.990811Z","published":"2024-04-03T17:01:01.299Z","related":["SUSE-SU-2024:1979-1","SUSE-SU-2024:1983-1","SUSE-SU-2024:2008-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2135-1","SUSE-SU-2024:2184-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26775.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/19a77b27163820f793b4d022979ffdca8f659b77"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2499fa286fb010ceb289950050199f33c26667b9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2d623c94fbba3554f4446ba6f3c764994e8b0d26"},{"type":"WEB","url":"https://git.kernel.org/stable/c/673629018ba04906899dcb631beec34d871f709c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e169bd4fb2b36c4b2bee63c35c740c85daeb2e86"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26775.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26775"},{"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":"a782483cc1f875355690625d8253a232f2581418"},{"fixed":"2499fa286fb010ceb289950050199f33c26667b9"},{"fixed":"2d623c94fbba3554f4446ba6f3c764994e8b0d26"},{"fixed":"673629018ba04906899dcb631beec34d871f709c"},{"fixed":"19a77b27163820f793b4d022979ffdca8f659b77"},{"fixed":"e169bd4fb2b36c4b2bee63c35c740c85daeb2e86"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26775.json"}}],"schema_version":"1.7.5"}