Hi
When you compile kernel on Sparc64 with heap memory checking and type
"cat /proc/iomem", you get a crash, because pointers in struct resource
are uninitialized.
Most code fills struct resource with zeros, so I assume that it is
responsibility of the caller of request_resource to initialized it, not
the responsibility of request_resource functuion.
After 2.6.29 is out, there could be a check for uninitialized fields added
to request_resource to avoid crashes like this.
Mikulas
---
arch/sparc/kernel/pci_common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6.29-rc8-devel/arch/sparc/kernel/pci_common.c
===================================================================
--- linux-2.6.29-rc8-devel.orig/arch/sparc/kernel/pci_common.c 2009-03-17 12:49:51.000000000 +0100
+++ linux-2.6.29-rc8-devel/arch/sparc/kernel/pci_common.c 2009-03-17 12:50:16.000000000 +0100
@@ -368,7 +368,7 @@ static void pci_register_iommu_region(st
const u32 *vdma = of_get_property(pbm->op->node, "virtual-dma", NULL);
if (vdma) {
- struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL);
+ struct resource *rp = kzalloc(sizeof(*rp), GFP_KERNEL);
if (!rp) {
prom_printf("Cannot allocate IOMMU resource.\n");
--
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