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VMCI: integer overflow in vmci_datagram_dispatch()

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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 <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2014-08-29 11:42:56 +03:00 committed by Greg Kroah-Hartman
parent 95e838c915
commit 2e45354645
1 changed files with 2 additions and 1 deletions
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3
drivers/misc/vmw_vmci/vmci_datagram.c
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@ -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;