CVE-2025-38066 dm cache: prevent BUG_ON by blocking retries on failed device resumes

In the Linux kernel, the following vulnerability has been resolved: dm cache: prevent BUGON by blocking retries on failed device resumes A cache device failing to resume due to mapping errors should not be retried, as the failure leaves a partially initialized policy object. Repeating the resume...

CVE-2025-38066

CVE-2025-38066 affects the Linux kernel in the dm-cache subsystem (policy SMQ). The issue arises when a cache device fails to resume due to mapping errors and a resumed operation is retried, which can leave a partially initialized policy object and trigger a BUG_ON during mapping reload. The conn...