CVE-2021-47622

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724	Mailing List Patch
https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b	Mailing List Patch
https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768	Mailing List Patch
https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724	Mailing List Patch
https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b	Mailing List Patch
https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768	Mailing List Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-07-16 12:15

Updated : 2024-11-21 06:36

NVD link : CVE-2021-47622

Mitre link : CVE-2021-47622

CVE.ORG link : CVE-2021-47622

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-667

Improper Locking

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