On 6/5/2024 10:27 PM, Christoph Hellwig wrote:
> 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.
>
> Fixes: 7ba1ba12eeef ("block: Block layer data integrity support")
> Signed-off-by: Christoph Hellwig<hch@xxxxxx>
Looks good.
Reviewed-by: Chaitanya Kulkarni <kch@xxxxxxxxxx>
-ck
