CVE-2024-41078

btrfs: qgroup: fix quota root leak after quota disable failure

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: qgroup: fix quota root leak after quota disable failure If during the quota disable we fail when cleaning the quota tree or when deleting the root from the root tree, we jump to the 'out' label without ever dropping the reference on the quota root, resulting in a leak of the root since fs_info->quota_root is no longer pointing to the root (we have set it to NULL just before those steps). Fix this by always doing a btrfs_put_root() call under the 'out' label. This is a problem that exists since qgroups were first added in 2012 by commit bed92eae26cc ("Btrfs: qgroup implementation and prototypes"), but back then we missed a kfree on the quota root and free_extent_buffer() calls on its root and commit root nodes, since back then roots were not yet reference counted.

N/A

CVSS

Severity:

EPSS 0.27%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/94818bdb00ef34a996a06aa63d11f591074cb757
https://git.kernel.org/stable/c/8a69529f22590b67bb018de9acbcf94abc8603cf
https://git.kernel.org/stable/c/5ef3961682e5310f2221bae99bcf9f5d0f4b0d51
https://git.kernel.org/stable/c/f88aeff5a173e8ba3133314eb4b964236ef3589d
https://git.kernel.org/stable/c/7dd6a5b96157a21245566b21fd58276a214357ff
https://git.kernel.org/stable/c/a7e4c6a3031c74078dba7fa36239d0f4fe476c53

Frequently Asked Questions

What is the severity of CVE-2024-41078?: CVE-2024-41078 has not yet been assigned a CVSS score.
How to fix CVE-2024-41078?: To fix CVE-2024-41078, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-41078 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-41078 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-41078?: CVE-2024-41078 affects Linux Linux, Linux Linux.

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