A device can report an excessive number of VPD pages when asked for a
list; this can cause an out-of-bounds access to buf in
scsi_generic_set_vpd_bl_emulation. It should not happen, but
it is technically not incorrect so handle it: do not check any byte
past the allocation length that was sent to the INQUIRY command.
Reported-by: Max Reitz <mre...@redhat.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
hw/scsi/scsi-generic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c
index aebb7cdd82..c5497bbea8 100644
--- a/hw/scsi/scsi-generic.c
+++ b/hw/scsi/scsi-generic.c
@@ -538,7 +538,7 @@ static void scsi_generic_set_vpd_bl_emulation(SCSIDevice *s)
}
page_len = buf[3];
- for (i = 4; i < page_len + 4; i++) {
+ for (i = 4; i < MIN(sizeof(buf), page_len + 4); i++) {
if (buf[i] == 0xb0) {
s->needs_vpd_bl_emulation = false;
return;
--
2.17.1
