CVE-2024-41078

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxbed92eae26ccf280d1a2168b7509447b56675a27 < 94818bdb00ef34a996a06aa63d11f591074cb757affected
LinuxLinuxbed92eae26ccf280d1a2168b7509447b56675a27 < 8a69529f22590b67bb018de9acbcf94abc8603cfaffected
LinuxLinuxbed92eae26ccf280d1a2168b7509447b56675a27 < 5ef3961682e5310f2221bae99bcf9f5d0f4b0d51affected
LinuxLinuxbed92eae26ccf280d1a2168b7509447b56675a27 < f88aeff5a173e8ba3133314eb4b964236ef3589daffected
LinuxLinuxbed92eae26ccf280d1a2168b7509447b56675a27 < 7dd6a5b96157a21245566b21fd58276a214357ffaffected
LinuxLinuxbed92eae26ccf280d1a2168b7509447b56675a27 < a7e4c6a3031c74078dba7fa36239d0f4fe476c53affected
LinuxLinux3.6affected
LinuxLinux0 < 3.6unaffected
LinuxLinux5.10.223 <= 5.10.*unaffected
LinuxLinux5.15.164 <= 5.15.*unaffected
LinuxLinux6.1.101 <= 6.1.*unaffected
LinuxLinux6.6.42 <= 6.6.*unaffected
LinuxLinux6.9.11 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References