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From:   Julia Lawall <Julia.Lawall@inria.fr>
To:     Shannon Nelson <shannon.nelson@amd.com>
Cc:     keescook@chromium.org, kernel-janitors@vger.kernel.org,
        Brett Creeley <brett.creeley@amd.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 09/26] pds_core: use array_size
Date:   Fri, 23 Jun 2023 23:14:40 +0200
Message-Id: <20230623211457.102544-10-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
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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/net/ethernet/amd/pds_core/core.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amd/pds_core/core.c b/drivers/net/ethernet/amd/pds_core/core.c
index 483a070d96fa..d87f45a1ee2f 100644
--- a/drivers/net/ethernet/amd/pds_core/core.c
+++ b/drivers/net/ethernet/amd/pds_core/core.c
@@ -196,7 +196,7 @@ int pdsc_qcq_alloc(struct pdsc *pdsc, unsigned int type, unsigned int index,
 	dma_addr_t q_base_pa;
 	int err;
 
-	qcq->q.info = vzalloc(num_descs * sizeof(*qcq->q.info));
+	qcq->q.info = vzalloc(array_size(num_descs, sizeof(*qcq->q.info)));
 	if (!qcq->q.info) {
 		err = -ENOMEM;
 		goto err_out;
@@ -219,7 +219,7 @@ int pdsc_qcq_alloc(struct pdsc *pdsc, unsigned int type, unsigned int index,
 	if (err)
 		goto err_out_free_q_info;
 
-	qcq->cq.info = vzalloc(num_descs * sizeof(*qcq->cq.info));
+	qcq->cq.info = vzalloc(array_size(num_descs, sizeof(*qcq->cq.info)));
 	if (!qcq->cq.info) {
 		err = -ENOMEM;
 		goto err_out_free_irq;