Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
ext4: do not create EA inode under buffer lock
ext4_xattr_set_entry() creates new EA inodes while holding buffer lock on the external xattr block. This is problematic as it nests all the allocation locking (which acquires locks on other buffers) under the buffer lock. This can even deadlock when the filesystem is corrupted and e.g. quota file is setup to contain xattr block as data block. Move the allocation of EA inode out of ext4_xattr_set_entry() into the callers.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 6 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 6 ELS , CloudLinux 7 ELS , Debian 10 ELS , Oracle Linux 6 ELS , Oracle Linux 7 ELS , RHEL 7 ELS , TuxCare 9.6 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS
- Affected packages:
- linux @ 4.4.0 (+19 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 8 | Released |
43 kernels
|
| AlmaLinux 9 | Released |
32 kernels
|
| Amazon Linux 2023 | Planned | — |
| CentOS 8 | Released |
33 kernels
|
| CloudLinux OS 7h | Released |
60 kernels
|
| CloudLinux OS 8 | Released |
56 kernels
|
| Debian 12 | Released |
16 kernels
|
| Oracle Linux 8 | Released |
68 kernels
|
| Oracle Linux 9 | Released |
38 kernels
|
| RHEL 8 | Released |
64 kernels
|
| RHEL 9 | Released |
32 kernels
|
| Rocky Linux 8 | Released |
38 kernels
|
| Rocky Linux 9 | Released |
32 kernels
|
| Ubuntu 24.04 | Planned | — |