{"id":"CVE-2022-49406","summary":"block: Fix potential deadlock in blk_ia_range_sysfs_show()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Fix potential deadlock in blk_ia_range_sysfs_show()\n\nWhen being read, a sysfs attribute is already protected against removal\nwith the kobject node active reference counter. As a result, in\nblk_ia_range_sysfs_show(), there is no need to take the queue sysfs\nlock when reading the value of a range attribute. Using the queue sysfs\nlock in this function creates a potential deadlock situation with the\ndisk removal, something that a lockdep signals with a splat when the\ndevice is removed:\n\n[  760.703551]  Possible unsafe locking scenario:\n[  760.703551]\n[  760.703554]        CPU0                    CPU1\n[  760.703556]        ----                    ----\n[  760.703558]   lock(&q-\u003esysfs_lock);\n[  760.703565]                                lock(kn-\u003eactive#385);\n[  760.703573]                                lock(&q-\u003esysfs_lock);\n[  760.703579]   lock(kn-\u003eactive#385);\n[  760.703587]\n[  760.703587]  *** DEADLOCK ***\n\nSolve this by removing the mutex_lock()/mutex_unlock() calls from\nblk_ia_range_sysfs_show().","modified":"2026-04-02T08:27:33.611291Z","published":"2025-02-26T02:12:31.086Z","related":["SUSE-SU-2025:1176-1","SUSE-SU-2025:1241-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49406.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532"},{"type":"WEB","url":"https://git.kernel.org/stable/c/717b078bc745ba9a262abebed9806a17e8bbb77b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc107c805cde709866b59867ef72b9390199205e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49406.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49406"},{"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":"a2247f19ee1c5ad75ef095cdfb909a3244b88aa8"},{"fixed":"dc107c805cde709866b59867ef72b9390199205e"},{"fixed":"717b078bc745ba9a262abebed9806a17e8bbb77b"},{"fixed":"41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49406.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}