| Summary: |
VUL-0: CVE-2022-48846: kernel: block: release rq qos structures for queue without disk |
| Product: |
[Novell Products] SUSE Security Incidents
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Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Security Team bot <security-team> |
| Status: |
NEW
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QA Contact: |
Security Team bot <security-team> |
| Severity: |
Normal
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| Priority: |
P3 - Medium
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CC: |
gianluca.gabrielli, miroslav.franc
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| Version: |
unspecified | |
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| Target Milestone: |
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| Hardware: |
Other | |
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| OS: |
Other | |
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| URL: |
https://smash.suse.de/issue/414264/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2022-48846:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) |
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Found By:
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Security Response Team
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Services Priority:
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Business Priority:
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Blocker:
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Marketing QA Status:
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IT Deployment:
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In the Linux kernel, the following vulnerability has been resolved: block: release rq qos structures for queue without disk blkcg_init_queue() may add rq qos structures to request queue, previously blk_cleanup_queue() calls rq_qos_exit() to release them, but commit 8e141f9eb803 ("block: drain file system I/O on del_gendisk") moves rq_qos_exit() into del_gendisk(), so memory leak is caused because queues may not have disk, such as un-present scsi luns, nvme admin queue, ... Fixes the issue by adding rq_qos_exit() to blk_cleanup_queue() back. BTW, v5.18 won't need this patch any more since we move blkcg_init_queue()/blkcg_exit_queue() into disk allocation/release handler, and patches have been in for-5.18/block. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48846 https://www.cve.org/CVERecord?id=CVE-2022-48846 https://git.kernel.org/stable/c/60c2c8e2ef3a3ec79de8cbc80a06ca0c21df8c29 https://git.kernel.org/stable/c/d4ad8736ac982111bb0be8306bf19c8207f6600e https://git.kernel.org/stable/c/daaca3522a8e67c46e39ef09c1d542e866f85f3b https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48846.mbox https://bugzilla.redhat.com/show_bug.cgi?id=2298187