| Summary: |
VUL-0: CVE-2024-27023: kernel: md: fix missing release of 'active_io' for flush |
| Product: |
[Novell Products] SUSE Security Incidents
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Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Security Team bot <security-team> |
| Status: |
RESOLVED
FIXED
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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: |
camila.matos, vasant.karasulli
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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/403814/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2024-27023:5.5:(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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---
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Marketing QA Status:
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---
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IT Deployment:
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In the Linux kernel, the following vulnerability has been resolved: md: Fix missing release of 'active_io' for flush submit_flushes atomic_set(&mddev->flush_pending, 1); rdev_for_each_rcu(rdev, mddev) atomic_inc(&mddev->flush_pending); bi->bi_end_io = md_end_flush submit_bio(bi); /* flush io is done first */ md_end_flush if (atomic_dec_and_test(&mddev->flush_pending)) percpu_ref_put(&mddev->active_io) -> active_io is not released if (atomic_dec_and_test(&mddev->flush_pending)) -> missing release of active_io For consequence, mddev_suspend() will wait for 'active_io' to be zero forever. Fix this problem by releasing 'active_io' in submit_flushes() if 'flush_pending' is decreased to zero. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-27023 https://www.cve.org/CVERecord?id=CVE-2024-27023 https://git.kernel.org/stable/c/02dad157ba11064d073f5499dc33552b227d5d3a https://git.kernel.org/stable/c/11f81438927f84edfaaeb5d5f10856c3a1c1fc82 https://git.kernel.org/stable/c/6b2ff10390b19a2364af622b6666b690443f9f3f https://git.kernel.org/stable/c/855678ed8534518e2b428bcbcec695de9ba248e8 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-27023.mbox https://bugzilla.redhat.com/show_bug.cgi?id=2278488