A guest could set the message ring page count to zero, resulting in
infinite loop. Add check to avoid it.
Reported-by: YY Z <bigbird475958471@gmail.com>
Signed-off-by: P J P <ppandit@redhat.com>
Message-Id: <
20170425130623.3649-1-ppandit@redhat.com>
Reviewed-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit
f68826989cd4d1217797251339579c57b3c0934e)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
uint32_t len_log2;
uint32_t ring_size;
- if (ri->numPages > PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES) {
+ if (!ri->numPages || ri->numPages > PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES) {
return -1;
}
ring_size = ri->numPages * PVSCSI_MAX_NUM_MSG_ENTRIES_PER_PAGE;