diff mbox series

[25/26] vduse: use array_size

Message ID	20230623211457.102544-26-Julia.Lawall@inria.fr
State	New
Headers	Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; From: Julia Lawall <Julia.Lawall@inria.fr> To: "Michael S. Tsirkin" <mst@redhat.com> Cc: keescook@chromium.org, kernel-janitors@vger.kernel.org, Jason Wang <jasowang@redhat.com>, Xuan Zhuo <xuanzhuo@linux.alibaba.com>, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH 25/26] vduse: use array_size Date: Fri, 23 Jun 2023 23:14:56 +0200 Message-Id: <20230623211457.102544-26-Julia.Lawall@inria.fr> In-Reply-To: <20230623211457.102544-1-Julia.Lawall@inria.fr> References: <20230623211457.102544-1-Julia.Lawall@inria.fr> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	use array_size \| [00/26] use array_size [01/26] lib/test_vmalloc.c: use array_size [02/26] octeon_ep: use array_size [03/26] drm/gud: use array_size [04/26] gve: use array_size [05/26] RDMA/erdma: use array_size [06/26] dma-buf: system_heap: use array_size [07/26] scsi: fnic: use array_size [08/26] virtio-mem: use array_size [09/26] pds_core: use array_size [10/26] bus: mhi: host: use array_size [11/26] ionic: use array_size [12/26] btrfs: zoned: use array_size [13/26] iommu/tegra: gart: use array_size [14/26] RDMA/siw: use array_size [15/26] habanalabs: use array_size [16/26] drm/i915/gvt: use array_size [17/26] kcov: use array_size [18/26] net: enetc: use array_size [19/26] RDMA/bnxt_re: use array_size [20/26] drm/vmwgfx: use array_size [21/26] x86/sgx: use array_size [22/26] net: mana: use array_size [23/26] media: staging: imgu: use array_size [24/26] scsi: qla2xxx: use array_size [25/26] vduse: use array_size [26/26] comedi: use array_size

Commit Message

Julia Lawall June 23, 2023, 9:14 p.m. UTC

  Use array_size to protect against multiplication overflows.

The changes were done using the following Coccinelle semantic patch:

// <smpl>
@@
    expression E1, E2;
    constant C1, C2;
    identifier alloc = {vmalloc,vzalloc};
@@
    
(
      alloc(C1 * C2,...)
|
      alloc(
-           (E1) * (E2)
+           array_size(E1, E2)
      ,...)
)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

---
 drivers/vdpa/vdpa_user/iova_domain.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff mbox series

Patch

diff --git a/drivers/vdpa/vdpa_user/iova_domain.c b/drivers/vdpa/vdpa_user/iova_domain.c
index 5e4a77b9bae6..ee395e013086 100644
--- a/drivers/vdpa/vdpa_user/iova_domain.c
+++ b/drivers/vdpa/vdpa_user/iova_domain.c
@@ -571,8 +571,9 @@  vduse_domain_create(unsigned long iova_limit, size_t bounce_size)
 
 	domain->iova_limit = iova_limit;
 	domain->bounce_size = PAGE_ALIGN(bounce_size);
-	domain->bounce_maps = vzalloc(bounce_pfns *
-				sizeof(struct vduse_bounce_map));
+	domain->bounce_maps =
+		vzalloc(array_size(bounce_pfns,
+				   sizeof(struct vduse_bounce_map)));
 	if (!domain->bounce_maps)
 		goto err_map;