🛡️ CVE-2026-46051 — kernel

md/raid5: fix soft lockup in retry_aligned_read()

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

md/raid5: fix soft lockup in retry_aligned_read()

When retry_aligned_read() encounters an overlapped stripe, it releases

the stripe via raid5_release_stripe() which puts it on the lockless

released_stripes llist. In the next raid5d loop iteration,

release_stripe_list() drains the stripe onto handle_list (since

STRIPE_HANDLE is set by the original IO), but retry_aligned_read()

runs before handle_active_stripes() and removes the stripe from

handle_list via find_get_stripe() -> list_del_init(). This prevents

handle_stripe() from ever processing the stripe to resolve the

overlap, causing an infinite loop and soft lockup.

Fix this by using __release_stripe() with temp_inactive_list instead

of raid5_release_stripe() in the failure path, so the stripe does not

go through the released_stripes llist. This allows raid5d to break out

of its loop, and the overlap will be resolved when the stripe is

eventually processed by handle_stripe().