What happened
In the Linux kernel, the following vulnerability has been resolved: block: mark GFP_NOIO around sysfs ->store() sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused. Fix the issue by marking NOIO around sysfs ->store()
Affected versions
Linux: 1645cd7fd42c236c952e9228badcac4fea1829ea through before a09280c39ea54080daf19cfaf4a3121a8d17d5cd (git); 8985da5481562e96b95e94ed8e5cc9b6565eb82b through before 2566ce907e5d5db8a039647208e029ce559baa31 (git); c99f66e4084a62a2cc401c4704a84328aeddc9ec through before 7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c (git); 6.12.96 through before 6.12.109 (semver); 6.13.2 through before 6.13.3 (semver) Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.