From: Toshi Kani <toshi.kani@hp.com>
Date: Wed, 10 Jul 2013 16:47:13 +0000 (-0600)
Subject: ACPI / memhotplug: Fix a stale pointer in error path
X-Git-Tag: v3.2.50~46
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e75362130f7535081b1e72911404d5f9030df82;p=pandora-kernel.git

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: Ben Hutchings <ben@decadent.org.uk>
---

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