CVE-2026-74374: md/raid1,raid10: fix error-path detection with md_cloned_bio()

In the Linux kernel, the following vulnerability has been resolved:

md/raid1,raid10: fix error-path detection with mdclonedbio()

Detect the error path using mdclonedbio() instead of relying on r1bio in raid1 or r10bio->readslot in raid10, which may be NULL or -1 after splitting and resubmitting a failed bio.

As a result, the error path may not be recognized and memory allocations can incorrectly use GFPNOIO instead of (GFPNOIO | GFPHIGH), which can lead to a deadlock under memory pressure.