Definitely don't try to unmap a garbage address.
Reported-by: Zuozhi fzz <[email protected]>
Signed-off-by: John Snow <[email protected]>
Message-id: [email protected]
---
hw/ide/ahci.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 7e87b18..3a95dad 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -662,6 +662,10 @@ static bool ahci_map_fis_address(AHCIDevice *ad)
static void ahci_unmap_fis_address(AHCIDevice *ad)
{
+ if (ad->res_fis == NULL) {
+ DPRINTF(ad->port_no, "Attempt to unmap NULL FIS address\n");
+ return;
+ }
dma_memory_unmap(ad->hba->as, ad->res_fis, 256,
DMA_DIRECTION_FROM_DEVICE, 256);
ad->res_fis = NULL;
@@ -678,6 +682,10 @@ static bool ahci_map_clb_address(AHCIDevice *ad)
static void ahci_unmap_clb_address(AHCIDevice *ad)
{
+ if (ad->lst == NULL) {
+ DPRINTF(ad->port_no, "Attempt to unmap NULL CLB address\n");
+ return;
+ }
dma_memory_unmap(ad->hba->as, ad->lst, 1024,
DMA_DIRECTION_FROM_DEVICE, 1024);
ad->lst = NULL;
--
2.4.3
