diff options
| author | Will Deacon <will.deacon@arm.com> | 2012-10-19 14:03:32 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-11 12:04:17 -0700 |
| commit | 6330a0c429c1518714283be51b86dc02b45db882 (patch) | |
| tree | 0741c1546b3580d3d7e519d568a3e47734a678ba /include/rxrpc | |
| parent | ad988bcb5b18ad5e1865f638cfc7ba3e600c4d46 (diff) | |
virtio: 9p: correctly pass physical address to userspace for high pages
commit 30d395b124c51db66d9f3ba0611cd62021afc392 upstream.
commit b9cdc88df8e63e81c723b82c286fc97f5d0dc325 upstream.
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: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/rxrpc')
0 files changed, 0 insertions, 0 deletions