amdkfd: use calloc instead of kzalloc to avoid integer overflow

commit 3b0daecfeac0103aba8b293df07a0cbaf8b43f29 upstream.

This uses calloc instead of doing the multiplication which might
overflow.

Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index c37f1fcd2165b5ab62aef70bbabc5cdc19c8f0ac..c157721214e8d9b43b38897b8fa9aa525669c561 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -778,8 +778,8 @@ static int kfd_ioctl_get_process_apertures_new(struct file *filp,
         * nodes, but not more than args->num_of_nodes as that is
         * the amount of memory allocated by user
         */
-       pa = kzalloc((sizeof(struct kfd_process_device_apertures) *
-                               args->num_of_nodes), GFP_KERNEL);
+       pa = kcalloc(args->num_of_nodes, sizeof(struct kfd_process_device_apertures),
+                    GFP_KERNEL);
        if (!pa)
                return -ENOMEM;