Message ID | 20230623211457.102544-26-Julia.Lawall@inria.fr |
---|---|
State | New |
Headers |
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([128.93.90.48]) by mail3-relais-sop.national.inria.fr with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jun 2023 23:15:15 +0200 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> X-Mailer: git-send-email 2.20.1 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 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1769530175486048160?= X-GMAIL-MSGID: =?utf-8?q?1769530175486048160?= |
Series |
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 --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;