| Message ID | 1374780536-18164-1-git-send-email-kamal@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index b679bf8..6d11ec6 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -406,6 +406,7 @@ 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; }
This is a note to let you know that I have just added a patch titled ACPI / memhotplug: Fix a stale pointer in error path to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue This patch is scheduled to be released in version 3.8.13.6. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.8.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From f4072148ec85ce5e4a7968a08efb454f96be6eae Mon Sep 17 00:00:00 2001 From: Toshi Kani <toshi.kani@hp.com> Date: Wed, 10 Jul 2013 10:47:13 -0600 Subject: ACPI / memhotplug: Fix a stale pointer in error path commit d19f503e22316a84c39bc19445e0e4fdd49b3532 upstream. 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@hp.com> Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/acpi/acpi_memhotplug.c | 1 + 1 file changed, 1 insertion(+) -- 1.8.1.2