AZL-49953
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-49953.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-49953
- Upstream
- Published
- 2024-09-04T19:15:30Z
- Modified
- 2026-04-01T05:16:13.643019Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2024-44963 affecting package kernel 5.15.200.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
btrfs: do not BUG_ON() when freeing tree block after error
When freeing a tree block, at btrfsfreetreeblock(), if we fail to create a delayed reference we don't deal with the error and just do a BUGON(). The error most likely to happen is -ENOMEM, and we have a comment mentioning that only -ENOMEM can happen, but that is not true, because in case qgroups are enabled any error returned from btrfsqgrouptraceextentpost() (can be -EUCLEAN or anything returned from btrfssearchslot() for example) can be propagated back to btrfsfreetree_block().
So stop doing a BUG_ON() and return the error to the callers and make them abort the transaction to prevent leaking space. Syzbot was triggering this, likely due to memory allocation failure injection.
- References