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: Dan Carpenter <[email protected]> diff --git a/drivers/misc/vmw_vmci/vmci_datagram.c b/drivers/misc/vmw_vmci/vmci_datagram.c index f3cdd90..8226652 100644 --- a/drivers/misc/vmw_vmci/vmci_datagram.c +++ b/drivers/misc/vmw_vmci/vmci_datagram.c @@ -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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
