{"id":"CVE-2021-47622","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: Fix a deadlock in the error handler\n\nThe following deadlock has been observed on a test setup:\n\n - All tags allocated\n\n - The SCSI error handler calls ufshcd_eh_host_reset_handler()\n\n - ufshcd_eh_host_reset_handler() queues work that calls\n   ufshcd_err_handler()\n\n - ufshcd_err_handler() locks up as follows:\n\nWorkqueue: ufs_eh_wq_0 ufshcd_err_handler.cfi_jt\nCall trace:\n __switch_to+0x298/0x5d8\n __schedule+0x6cc/0xa94\n schedule+0x12c/0x298\n blk_mq_get_tag+0x210/0x480\n __blk_mq_alloc_request+0x1c8/0x284\n blk_get_request+0x74/0x134\n ufshcd_exec_dev_cmd+0x68/0x640\n ufshcd_verify_dev_init+0x68/0x35c\n ufshcd_probe_hba+0x12c/0x1cb8\n ufshcd_host_reset_and_restore+0x88/0x254\n ufshcd_reset_and_restore+0xd0/0x354\n ufshcd_err_handler+0x408/0xc58\n process_one_work+0x24c/0x66c\n worker_thread+0x3e8/0xa4c\n kthread+0x150/0x1b4\n ret_from_fork+0x10/0x30\n\nFix this lockup by making ufshcd_exec_dev_cmd() allocate a reserved\nrequest.","modified":"2026-03-13T05:18:12.193307Z","published":"2024-07-16T12:15:02.400Z","related":["SUSE-SU-2024:2894-1","SUSE-SU-2024:2902-1","SUSE-SU-2024:2929-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2947-1","SUSE-SU-2024:3566-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b"},{"type":"FIX","url":"https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768"},{"type":"FIX","url":"https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.15.25"}]},{"events":[{"introduced":"5.16"},{"fixed":"5.16.11"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47622.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"}]}