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xen-pt: fix Out-of-bounds read 

The array length of s->real_device.io_regions[] is
"PCI_NUM_REGIONS - 1".

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Gonglei 2015-02-10 15:51:23 +08:00 committed by Michael Tokarev
parent d4cd450288
commit 14cec170ea
1 changed files with 1 additions and 1 deletions
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2
hw/xen/xen_pt_config_init.c
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@ -438,7 +438,7 @@ static int xen_pt_bar_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
/* get BAR index */
index = xen_pt_bar_offset_to_index(reg->offset);
if (index < 0 || index >= PCI_NUM_REGIONS) {
if (index < 0 || index >= PCI_NUM_REGIONS - 1) {
XEN_PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
return -1;
}