CVE-2021-47579
Published: Jun 19, 2024
Modified: May 11, 2026
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c - < 445d2dc63e5871d218f21b8f62ab29ac72f2e6b8affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c - < f9f300a92297be8250547347fd52216ef0177ae0affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c - < 6859985a2fbda5d1586bf44538853e1be69e85f7affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c - < d2ccdd4e4efab06178608a34d7bfb20a54104c02affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c - < 1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c |
Linux | Linux | affected 3.18unaffected 0 - < 3.18unaffected 4.19.222 - <= 4.19.*unaffected 5.4.168 - <= 5.4.*unaffected 5.10.88 - <= 5.10.*+2 more versions |
References
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