diff mbox series

[13/26] iommu/tegra: gart: use array_size

Message ID	20230623211457.102544-14-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: Thierry Reding <thierry.reding@gmail.com> Cc: keescook@chromium.org, kernel-janitors@vger.kernel.org, Krishna Reddy <vdumpa@nvidia.com>, Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>, Robin Murphy <robin.murphy@arm.com>, Jonathan Hunter <jonathanh@nvidia.com>, linux-tegra@vger.kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH 13/26] iommu/tegra: gart: use array_size Date: Fri, 23 Jun 2023 23:14:44 +0200 Message-Id: <20230623211457.102544-14-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/iommu/tegra-gart.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff mbox series

Patch

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index a482ff838b53..def222da83f1 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -348,8 +348,8 @@  struct gart_device *tegra_gart_probe(struct device *dev, struct tegra_mc *mc)
 	if (err)
 		goto remove_sysfs;
 
-	gart->savedata = vmalloc(resource_size(res) / GART_PAGE_SIZE *
-				 sizeof(u32));
+	gart->savedata = vmalloc(array_size(resource_size(res) / GART_PAGE_SIZE,
+					    sizeof(u32)));
 	if (!gart->savedata) {
 		err = -ENOMEM;
 		goto unregister_iommu;