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Commit 2e453546 authored by Dan Carpenter's avatar Dan Carpenter Committed by Greg Kroah-Hartman
Browse files

VMCI: integer overflow in vmci_datagram_dispatch() 



This is untrusted user data from vmci_host_do_send_datagram() so the
VMCI_DG_SIZE() macro can have an integer overflow.

Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 95e838c9

drivers/misc/vmw_vmci/vmci_datagram.c

+2 −1
Original line number Diff line number Diff line
@@ -328,7 +328,8 @@ int vmci_datagram_dispatch(u32 context_id, 


	BUILD_BUG_ON(sizeof(struct vmci_datagram) != 24);



	if (VMCI_DG_SIZE(dg) > VMCI_MAX_DG_SIZE) {

	if (dg->payload_size > VMCI_MAX_DG_SIZE ||

	    VMCI_DG_SIZE(dg) > VMCI_MAX_DG_SIZE) {

		pr_devel("Payload (size=%llu bytes) too big to send\n",

			 (unsigned long long)dg->payload_size);

		return VMCI_ERROR_INVALID_ARGS;