ghsa-4g7m-g45x-47rp
Vulnerability from github
Published
2024-06-19 15:30
Modified
2024-06-19 15:30
Details
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.
{ "affected": [], "aliases": [ "CVE-2021-47579" ], "database_specific": { "cwe_ids": [], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2024-06-19T15:15:52Z", "severity": null }, "details": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix warning in ovl_create_real()\n\nSyzbot triggered the following warning in ovl_workdir_create() -\u003e\novl_create_real():\n\n\tif (!err \u0026\u0026 WARN_ON(!newdentry-\u003ed_inode)) {\n\nThe reason is that the cgroup2 filesystem returns from mkdir without\ninstantiating the new dentry.\n\nWeird filesystems such as this will be rejected by overlayfs at a later\nstage during setup, but to prevent such a warning, call ovl_mkdir_real()\ndirectly from ovl_workdir_create() and reject this case early.", "id": "GHSA-4g7m-g45x-47rp", "modified": "2024-06-19T15:30:55Z", "published": "2024-06-19T15:30:54Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47579" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/445d2dc63e5871d218f21b8f62ab29ac72f2e6b8" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/6859985a2fbda5d1586bf44538853e1be69e85f7" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/d2ccdd4e4efab06178608a34d7bfb20a54104c02" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/f9f300a92297be8250547347fd52216ef0177ae0" } ], "schema_version": "1.4.0", "severity": [] }
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