virtio: 9p: correctly pass physical address to userspace for high pages

When using a virtio transport, the 9p net device may pass the physical
address of a kernel buffer to userspace via a scatterlist inside a
virtqueue. If the kernel buffer is mapped outside of the linear mapping
(e.g. highmem), then virt_to_page will return a bogus value and we will
populate the scatterlist with junk.

This patch uses kmap_to_page when populating the page array for a kernel
buffer.

Cc: [email protected]
Cc: Sasha Levin <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Rusty Russell <[email protected]>

0 files changed, 0 insertions, 0 deletions