tree 455f8a89afba046f7032b93b9c356cf126c42ae5
parent c524185c81d426d739d9534488684322dc1ec1a8
author Mark Bloch <markb@mellanox.com> 1477575391 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1480150494 +0100

IB/core: Avoid unsigned int overflow in sg_alloc_table

commit 3c7ba5760ab8eedec01159b267bb9bfcffe522ac upstream.

sg_alloc_table gets unsigned int as parameter while the driver
returns it as size_t. Check npages isn't greater than maximum
unsigned int.

Fixes: eeb8461e36c9 ("IB: Refactor umem to use linear SG table")
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>