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Subject[patch 08/60] sparc64: Fix crash with /proc/iomem
-stable review patch.  If anyone has any objections, please let us know.

From: Mikulas Patocka <>

[ Upstream commit 192d7a4667c6d11d1a174ec4cad9a3c5d5f9043c ]

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.

Signed-off-by: Mikulas Patocka <>
Signed-off-by: David S. Miller <>
Signed-off-by: Greg Kroah-Hartman <>
arch/sparc64/kernel/pci_common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/sparc64/kernel/pci_common.c
+++ b/arch/sparc64/kernel/pci_common.c
@@ -368,7 +368,7 @@ static void pci_register_iommu_region(st
const u32 *vdma = of_get_property(pbm->prom_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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