Author: Mattia Dongili <malattia@xxxxxxxx>
Date: Fri Apr 1 10:01:41 2011 +0900
sony-laptop: fix early NULL pointer dereference
The SNC acpi driver could get early notifications before it fully
initializes and that could lead to dereferencing the sony_nc_handles
structure pointer that is still NULL at that stage.
Make sure we return early from the handle lookup function in these
cases.
Signed-off-by: Mattia Dongili <malattia@xxxxxxxx>
---
Hi Matthew,
if it's not too late, can you pick this one up instead of the previous
one (89ec2feafaedd759e53346d641f60863a14cfb9e)?
If it's too late I'll try and do a round of return value fixes later.
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index b2ce172..de79c18 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -810,6 +810,11 @@ static int sony_nc_handles_cleanup(struct platform_device *pd)
static int sony_find_snc_handle(int handle)
{
int i;
+
+ /* not initialized yet, return early */
+ if (!handles)
+ return -EINVAL;
+
for (i = 0; i < 0x10; i++) {
if (handles->cap[i] == handle) {
dprintk("found handle 0x%.4x (offset: 0x%.2x)\n",
--
mattia
:wq!
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