In the Linux kernel, the following vulnerability has been resolved:
md/bitmap: resume array on backlog_store() error path
backlog_store() suspends the array before checking whether a write-mostly
device exists. If no such device exists, the error path only unlocks
reconfig_mutex and leaves the array suspended, blocking subsequent I/O.
Use mddev_unlock_and_resume() to release both states.
References 4
https://git.kernel.org/stable/c/03aad318f0a1f039dddf98739e705fdca3bf0d86
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/2911cd0a0f4366a7e06832bc5f0a7fdcc138e4dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6763fb409a0b4106676a52cf934440d9484b32c8
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/cc543e769b97d563b089b9e0ebf8ad361d15076f
416baaa9-dc9f-4396-8d5f-8c081fb06d67