CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's md (multiple device) subsystem, specifically in the RAID1, RAID10, and RAID456 configurations, where the REQ_NOWAIT support is improperly implemented. This can lead to inconsistent data across mirrored devices, as write requests may fail without proper error handling, potentially resulting in data loss or corruption. Organizations utilizing these RAID configurations should prioritize addressing this issue to maintain data integrity and prevent potential failures in their storage systems.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: md: remove REQ_NOWAIT support from raid1/10/456 REQ_NOWAIT support in md personalities that can block internally is fundamentally incomplete. While reads can avoid some blocking paths, write requests can still encounter cases where one mirror succeeds while another returns -EAGAIN. At that point md cannot distinguish queue pressure from a real device failure, so it can neither record a bad block nor safely retry the write without REQ_NOWAIT, leaving mirrors with divergent data. Rather than continue advertising REQ_NOWAIT support for personalities that cannot implement it correctly, remove it from raid1, raid10 and raid456. Keep REQ_NOWAIT for linear and raid0, which only remap bios to their underlying devices; stacked limits will still clear the feature if any component device lacks REQ_NOWAIT support.