CVE-2023-54268
Description
In the Linux kernel, the following vulnerability has been resolved: debugobjects: Don't wake up kswapd from fill_pool() syzbot is reporting a lockdep warning in fill_pool() because the allocation from debugobjects is using GFP_ATOMIC, which is (__GFP_HIGH | __GFP_KSWAPD_RECLAIM) and therefore tries to wake up kswapd, which acquires kswapd_wait::lock. Since fill_pool() might be called with arbitrary locks held, fill_pool() should not assume that acquiring kswapd_wait::lock is safe. Use __GFP_HIGH instead and remove __GFP_NORETRY as it is pointless for !__GFP_DIRECT_RECLAIM allocation.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2023-54268
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2023-54268.html
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2024:9315
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 6.1.37-1 |
| debian | bullseye | fixed | 5.10.191-1 |
| debian | forky | fixed | 6.3.7-1 |
| debian | sid | fixed | 6.3.7-1 |
| debian | trixie | fixed | 6.3.7-1 |
References
Verify integrity in audit chain (admin only). AS-IS.