From: Prasad J Pandit <p...@fedoraproject.org>
While doing MegaRAID SAS controller command frame lookup, routine
'megasas_lookup_frame' uses 'read_queue_head' value as an index
into 'frames[MEGASAS_MAX_FRAMES=2048]' array. Limit its value
within array bounds to avoid any OOB access.
Reported-by: Li Qiang <liqiang...@360.cn>
Signed-off-by: Prasad J Pandit <p...@fedoraproject.org>
---
hw/scsi/megasas.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 7c08932..76d57f9 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -649,8 +649,10 @@ static int megasas_init_firmware(MegasasState *s,
MegasasCmd *cmd)
pa_lo = le32_to_cpu(initq->pi_addr_lo);
pa_hi = le32_to_cpu(initq->pi_addr_hi);
s->producer_pa = ((uint64_t) pa_hi << 32) | pa_lo;
- s->reply_queue_head = ldl_le_pci_dma(pcid, s->producer_pa);
- s->reply_queue_tail = ldl_le_pci_dma(pcid, s->consumer_pa);
+ s->reply_queue_head = \
+ ldl_le_pci_dma(pcid, s->producer_pa) % MEGASAS_MAX_FRAMES;
+ s->reply_queue_tail = \
+ ldl_le_pci_dma(pcid, s->consumer_pa) % MEGASAS_MAX_FRAMES;
flags = le32_to_cpu(initq->flags);
if (flags & MFI_QUEUE_FLAG_CONTEXT64) {
s->flags |= MEGASAS_MASK_USE_QUEUE64;
--
2.5.5
