[Qemu-devel] [RFC PATCH 3/8] intel_iommu: allocate new key when creating new address space

[Jason Wang]

We use the pointer to stack for key for new address space, this will break hash
table searching, fixing by g_malloc() a new key instead.

Cc: Michael S. Tsirkin <address@hidden>
Cc: Paolo Bonzini <address@hidden>
Cc: Richard Henderson <address@hidden>
Cc: Eduardo Habkost <address@hidden>
Signed-off-by: Jason Wang <address@hidden>
---
 hw/i386/intel_iommu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index d647b42..36b2072 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1904,11 +1904,12 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, 
PCIBus *bus, int devfn)
     char name[128];
 
     if (!vtd_bus) {
+        uintptr_t *new_key = g_malloc(sizeof(*new_key));
+        *new_key = (uintptr_t)bus;
         /* No corresponding free() */
         vtd_bus = g_malloc0(sizeof(VTDBus) + sizeof(VTDAddressSpace *) * 
VTD_PCI_DEVFN_MAX);
         vtd_bus->bus = bus;
-        key = (uintptr_t)bus;
-        g_hash_table_insert(s->vtd_as_by_busptr, &key, vtd_bus);
+        g_hash_table_insert(s->vtd_as_by_busptr, new_key, vtd_bus);
     }
 
     vtd_dev_as = vtd_bus->dev_as[devfn];
-- 
2.5.0