Deadlock Affecting kernel-debug package, versions <0:4.18.0-553.22.1.el8_10
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUG-7512210
- published 17 Jul 2024
- disclosed 12 Jul 2024
Introduced: 12 Jul 2024
CVE-2024-40972 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug to version 0:4.18.0-553.22.1.el8_10 or higher.
This issue was patched in RHSA-2024:7000.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2024-40972
- https://git.kernel.org/stable/c/737fb7853acd5bc8984f6f42e4bfba3334be8ae1
- https://git.kernel.org/stable/c/0752e7fb549d90c33b4d4186f11cfd25a556d1dd
- https://git.kernel.org/stable/c/0a46ef234756dca04623b7591e8ebb3440622f0b
- https://git.kernel.org/stable/c/111103907234bffd0a34fba070ad9367de058752