linux-kernel - [PATCH v2 1/2] VMCI: Use struct

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Date: Fri,  5 Jan 2024 08:39:59 -0800
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: linux-hardening@...r.kernel.org, keescook@...omium.org, error27@...il.com,
        gustavoars@...nel.org, Bryan Tan <bryantan@...are.com>,
        Vishnu Dasa <vdasa@...are.com>,
        VMware PV-Drivers Reviewers <pv-drivers@...are.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc: vegard.nossum@...cle.com, darren.kenny@...cle.com,
        harshit.m.mogalapalli@...cle.com
Subject: [PATCH v2 1/2] VMCI: Use struct_size() in kmalloc()

Use struct_size() instead of open coding.

Suggested-by: Gustavo A. R. Silva <gustavoars@...nel.org>
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
 drivers/misc/vmw_vmci/vmci_datagram.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/vmw_vmci/vmci_datagram.c b/drivers/misc/vmw_vmci/vmci_datagram.c
index f50d22882476..ac6cb0c8d99b 100644
--- a/drivers/misc/vmw_vmci/vmci_datagram.c
+++ b/drivers/misc/vmw_vmci/vmci_datagram.c
@@ -224,8 +224,8 @@ static int dg_dispatch_as_host(u32 context_id, struct vmci_datagram *dg)
 				return VMCI_ERROR_NO_MEM;
 			}
 
-			dg_info = kmalloc(sizeof(*dg_info) +
-				    (size_t) dg->payload_size, GFP_ATOMIC);
+			dg_info = kmalloc(struct_size(dg_info, msg_payload, dg->payload_size),
+					  GFP_ATOMIC);
 			if (!dg_info) {
 				atomic_dec(&delayed_dg_host_queue_size);
 				vmci_resource_put(resource);
-- 
2.42.0