linux-kernel - [PATCH 11/26] ionic: use array

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Message-Id: <20230623211457.102544-12-Julia.Lawall@inria.fr>
Date:   Fri, 23 Jun 2023 23:14:42 +0200
From:   Julia Lawall <Julia.Lawall@...ia.fr>
To:     Shannon Nelson <shannon.nelson@....com>
Cc:     keescook@...omium.org, kernel-janitors@...r.kernel.org,
        Brett Creeley <brett.creeley@....com>, drivers@...sando.io,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 11/26] ionic: use array_size

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@...ia.fr>

---
 drivers/net/ethernet/pensando/ionic/ionic_lif.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 957027e546b3..f2e2c6853536 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -560,7 +560,7 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 	new->q.dev = dev;
 	new->flags = flags;
 
-	new->q.info = vzalloc(num_descs * sizeof(*new->q.info));
+	new->q.info = vzalloc(array_size(num_descs, sizeof(*new->q.info)));
 	if (!new->q.info) {
 		netdev_err(lif->netdev, "Cannot allocate queue info\n");
 		err = -ENOMEM;
@@ -581,7 +581,7 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 	if (err)
 		goto err_out;
 
-	new->cq.info = vzalloc(num_descs * sizeof(*new->cq.info));
+	new->cq.info = vzalloc(array_size(num_descs, sizeof(*new->cq.info)));
 	if (!new->cq.info) {
 		netdev_err(lif->netdev, "Cannot allocate completion queue info\n");
 		err = -ENOMEM;