This is a note to let you know that I've just added the patch titled
ACPI / memhotplug: Fix a stale pointer in error path
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-memhotplug-fix-a-stale-pointer-in-error-path.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From d19f503e22316a84c39bc19445e0e4fdd49b3532 Mon Sep 17 00:00:00 2001
From: Toshi Kani <[email protected]>
Date: Wed, 10 Jul 2013 10:47:13 -0600
Subject: ACPI / memhotplug: Fix a stale pointer in error path
From: Toshi Kani <[email protected]>
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 <[email protected]>
Reviewed-by: Yasuaki Ishimatsu <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/acpi/acpi_memhotplug.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -421,6 +421,7 @@ static int acpi_memory_device_add(struct
/* 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;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/acpi-memhotplug-fix-a-stale-pointer-in-error-path.patch
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