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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c to < 445d2dc63e5871d218f21b8f62ab29ac72f2e6b8affectede9be9d5e76e34872f0c37d72e25bc27fe9e2c54c to < f9f300a92297be8250547347fd52216ef0177ae0affectede9be9d5e76e34872f0c37d72e25bc27fe9e2c54c to < 6859985a2fbda5d1586bf44538853e1be69e85f7affectede9be9d5e76e34872f0c37d72e25bc27fe9e2c54c to < d2ccdd4e4efab06178608a34d7bfb20a54104c02affectede9be9d5e76e34872f0c37d72e25bc27fe9e2c54c to < 1f5573cfe7a7056e80a92c7a037a3e69f3a13d1caffected
Linux Linux
Default version status: affected
3.18affected0 to < 3.18unaffected4.19.222 to ≤ 4.19.*unaffected5.4.168 to ≤ 5.4.*unaffected5.10.88 to ≤ 5.10.*unaffected5.15.11 to ≤ 5.15.*unaffected5.16 to ≤ *unaffected
References
- 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 ↗