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vmstate: fix buffer overflow in target-arm/machine.c
CVE-2013-4531 cpreg_vmstate_indexes is a VARRAY_INT32. A negative value for cpreg_vmstate_array_len will cause a buffer overflow. VMSTATE_INT32_LE was supposed to protect against this but doesn't because it doesn't validate that input is non-negative. Fix this macro to valide the value appropriately. The only other user of VMSTATE_INT32_LE doesn't ever use negative numbers so it doesn't care. Reported-by: Anthony Liguori <anthony@codemonkey.ws> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com> (cherry picked from commit d2ef4b6) Conflicts: vmstate.c *removed dependency on b6fcfa5 (Move VMState code to vmstate.c) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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