3.6.11.9-rc1 stable review patch.
If anyone has any objections, please let me know.
------------------
From: Toshi Kani <toshi.kani@xxxxxx>
[ Upstream commit d19f503e22316a84c39bc19445e0e4fdd49b3532 ]
device->driver_data needs to be cleared when releasing its data,
mem_device, in an error path of acpi_memory_device_add().
The function evaluates the _CRS of memory device objects, and fails
when it gets an unexpected resource or cannot allocate memory. A
kernel crash or data corruption may occur when the kernel accesses
the stale pointer.
Signed-off-by: Toshi Kani <toshi.kani@xxxxxx>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: 2.6.32+ <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
drivers/acpi/acpi_memhotplug.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 24c807f..f16ffd4 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -442,6 +442,7 @@ static int acpi_memory_device_add(struct acpi_device *device)
/* Get the range from the _CRS */
result = acpi_memory_get_device_resources(mem_device);
if (result) {
+ device->driver_data = NULL;
kfree(mem_device);
return result;
}
--
1.7.10.4
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