| Message ID | 1374657112-11424-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index d985713..f81597f 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -421,6 +421,7 @@ 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-3.5.y-queue branch of the 3.5.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-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From c3234b2cd2083d30985dc2b73862a4dc6612403c Mon Sep 17 00:00:00 2001 From: Toshi Kani <toshi.kani@hp.com> Date: Wed, 10 Jul 2013 10:47:13 -0600 Subject: [PATCH] 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: Luis Henriques <luis.henriques@canonical.com> --- drivers/acpi/acpi_memhotplug.c | 1 + 1 file changed, 1 insertion(+) -- 1.8.1.2