diff options
| -rw-r--r-- | hw/xen/xen_pt_config_init.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c index b1ad743754..b58bf3983c 100644 --- a/hw/xen/xen_pt_config_init.c +++ b/hw/xen/xen_pt_config_init.c @@ -1949,9 +1949,15 @@ static int xen_pt_config_reg_init(XenPCIPassthroughState *s, } else val = data; + if (val & ~size_mask) { + XEN_PT_ERR(&s->dev,"Offset 0x%04x:0x%04x expands past register size(%d)!\n", + offset, val, reg->size); + g_free(reg_entry); + return -ENXIO; + } /* This could be just pci_set_long as we don't modify the bits - * past reg->size, but in case this routine is run in parallel - * we do not want to over-write other registers. */ + * past reg->size, but in case this routine is run in parallel or the + * init value is larger, we do not want to over-write registers. */ switch (reg->size) { case 1: pci_set_byte(s->dev.config + offset, (uint8_t)val); break; |