Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
7252a3603015f1fd04363956f4b72a537c9f9c42 to < 493c9e850677df8b4eda150c2364b1c1a72ed724affected7252a3603015f1fd04363956f4b72a537c9f9c42 to < d69d98d8edf90e25e4e09930dd36dd6d09dd6768affected7252a3603015f1fd04363956f4b72a537c9f9c42 to < 945c3cca05d78351bba29fa65d93834cb7934c7baffecteda8d2d45c70c7391386baf7863674f156da56a3d5affected5.4.112 to < 5.5affected
Linux Linux
Default version status: affected
5.6affected0 to < 5.6unaffected5.15.25 to ≤ 5.15.*unaffected5.16.11 to ≤ 5.16.*unaffected5.17 to ≤ *unaffected