Commit eba83a85 authored Oct 27, 2016 by Mark Bloch Committed by Greg Kroah-Hartman Nov 26, 2016

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: eeb8461e ("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>

parent c524185c

drivers/infiniband/core/umem.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -175,7 +175,7 @@ struct ib_umem ib_umem_get(struct ib_ucontext context, unsigned long addr,

		cur_base = addr & PAGE_MASK;

		if (npages == 0) {
		if (npages == 0 \|\| npages > UINT_MAX) {
		ret = -EINVAL;
		goto out;
		}