CVE-2021-47622
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47622
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47622.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-47622
- Downstream
- Related
- Published
- 2024-07-16T12:15:02Z
- Modified
- 2025-08-09T20:01:27Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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 ufshcdehhostresethandler()
ufshcdehhostresethandler() queues work that calls ufshcderrhandler()
ufshcderrhandler() locks up as follows:
Workqueue: ufsehwq0 ufshcderrhandler.cfijt Call trace: _switchto+0x298/0x5d8 _schedule+0x6cc/0xa94 schedule+0x12c/0x298 blkmqgettag+0x210/0x480 _blkmqallocrequest+0x1c8/0x284 blkgetrequest+0x74/0x134 ufshcdexecdevcmd+0x68/0x640 ufshcdverifydevinit+0x68/0x35c ufshcdprobehba+0x12c/0x1cb8 ufshcdhostresetandrestore+0x88/0x254 ufshcdresetandrestore+0xd0/0x354 ufshcderrhandler+0x408/0xc58 processonework+0x24c/0x66c workerthread+0x3e8/0xa4c kthread+0x150/0x1b4 retfromfork+0x10/0x30
Fix this lockup by making ufshcdexecdev_cmd() allocate a reserved request.
- References