CVE-2021-47622 (GCVE-0-2021-47622)
Vulnerability from cvelistv5
Published
2024-07-16 11:29
Modified
2026-05-23 15:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: Fix a deadlock in the error handler The following deadlock has been observed on a test setup: - All tags allocated - The SCSI error handler calls ufshcd_eh_host_reset_handler() - ufshcd_eh_host_reset_handler() queues work that calls ufshcd_err_handler() - ufshcd_err_handler() locks up as follows: Workqueue: ufs_eh_wq_0 ufshcd_err_handler.cfi_jt Call trace: __switch_to+0x298/0x5d8 __schedule+0x6cc/0xa94 schedule+0x12c/0x298 blk_mq_get_tag+0x210/0x480 __blk_mq_alloc_request+0x1c8/0x284 blk_get_request+0x74/0x134 ufshcd_exec_dev_cmd+0x68/0x640 ufshcd_verify_dev_init+0x68/0x35c ufshcd_probe_hba+0x12c/0x1cb8 ufshcd_host_reset_and_restore+0x88/0x254 ufshcd_reset_and_restore+0xd0/0x354 ufshcd_err_handler+0x408/0xc58 process_one_work+0x24c/0x66c worker_thread+0x3e8/0xa4c kthread+0x150/0x1b4 ret_from_fork+0x10/0x30 Fix this lockup by making ufshcd_exec_dev_cmd() allocate a reserved request.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7252a3603015f1fd04363956f4b72a537c9f9c42
Version: 7252a3603015f1fd04363956f4b72a537c9f9c42
Version: 7252a3603015f1fd04363956f4b72a537c9f9c42
Version: a8d2d45c70c7391386baf7863674f156da56a3d5
Version: 5.4.112   ≤
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