IT

Tracker / CVE-2024-41078

CVE-2024-41078

Medium 5.5

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.

Affected products and versions

linux linux_kernel
linux linux_kernel · … → 5.10.223
linux linux_kernel · 5.11 → 5.15.164
linux linux_kernel · 5.16 → 6.1.101
linux linux_kernel · 6.2 → 6.6.42
linux linux_kernel · 6.7 → 6.9.11

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References