Re: [PATCH net] vsock/vmci: Clear the vmci transport packet properly when initializing it

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On Tue, Jul 01, 2025 at 02:22:54PM +0200, Greg Kroah-Hartman wrote:
From: HarshaVardhana S A <harshavardhana.sa@xxxxxxxxxxxx>

In vmci_transport_packet_init memset the vmci_transport_packet before
populating the fields to avoid any uninitialised data being left in the
structure.

Cc: Bryan Tan <bryan-bt.tan@xxxxxxxxxxxx>
Cc: Vishnu Dasa <vishnu.dasa@xxxxxxxxxxxx>
Cc: Broadcom internal kernel review list
Cc: Stefano Garzarella <sgarzare@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Paolo Abeni <pabeni@xxxxxxxxxx>
Cc: Simon Horman <horms@xxxxxxxxxx>
Cc: virtualization@xxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: HarshaVardhana S A <harshavardhana.sa@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
Tweaked from original version by rewording the text and adding a blank
line and correctly sending it to the proper people for inclusion in net.

net/vmw_vsock/vmci_transport.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

Acked-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>

Patch LGTM, we can fix the switch later.

Stefano


diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
index b370070194fa..7eccd6708d66 100644
--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -119,6 +119,8 @@ vmci_transport_packet_init(struct vmci_transport_packet *pkt,
			   u16 proto,
			   struct vmci_handle handle)
{
+	memset(pkt, 0, sizeof(*pkt));
+
	/* We register the stream control handler as an any cid handle so we
	 * must always send from a source address of VMADDR_CID_ANY
	 */
@@ -131,8 +133,6 @@ vmci_transport_packet_init(struct vmci_transport_packet *pkt,
	pkt->type = type;
	pkt->src_port = src->svm_port;
	pkt->dst_port = dst->svm_port;
-	memset(&pkt->proto, 0, sizeof(pkt->proto));
-	memset(&pkt->_reserved2, 0, sizeof(pkt->_reserved2));

	switch (pkt->type) {
	case VMCI_TRANSPORT_PACKET_TYPE_INVALID:
--
2.50.0






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