[PATCH 01/12] block: initialize integrity buffer to zero before writing it to media

[Martin K. Petersen]

Christoph,

> Metadata added by bio_integrity_prep is using plain kmalloc, which
> leads to random kernel memory being written media. For PI metadata
> this is limited to the app tag that isn't used by kernel generated
> metadata, but for non-PI metadata the entire buffer leaks kernel
> memory.
>
> Fix this by adding the __GFP_ZERO flag to allocations for writes.

Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering