| Summary: |
VUL-0: CVE-2021-47579: kernel: ovl: fix warning in ovl_create_real() |
| 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
WONTFIX
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QA Contact: |
Security Team bot <security-team> |
| Severity: |
Minor
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| Priority: |
P3 - Medium
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CC: |
camila.matos, gabriel.bertazi
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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/411342/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2021-47579:3.3:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) |
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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: ovl: fix warning in ovl_create_real() Syzbot triggered the following warning in ovl_workdir_create() -> ovl_create_real(): if (!err && WARN_ON(!newdentry->d_inode)) { The reason is that the cgroup2 filesystem returns from mkdir without instantiating the new dentry. Weird filesystems such as this will be rejected by overlayfs at a later stage during setup, but to prevent such a warning, call ovl_mkdir_real() directly from ovl_workdir_create() and reject this case early. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47579 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47579.mbox https://git.kernel.org/stable/c/445d2dc63e5871d218f21b8f62ab29ac72f2e6b8 https://git.kernel.org/stable/c/f9f300a92297be8250547347fd52216ef0177ae0 https://git.kernel.org/stable/c/6859985a2fbda5d1586bf44538853e1be69e85f7 https://git.kernel.org/stable/c/d2ccdd4e4efab06178608a34d7bfb20a54104c02 https://git.kernel.org/stable/c/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c https://www.cve.org/CVERecord?id=CVE-2021-47579