This is a note to let you know that I've just added the patch titled
usb: host: xhci: Fix Null pointer dereferencing with 71c731a for non-x86
systems
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:
usb-host-xhci-fix-null-pointer-dereferencing-with-71c731a-for-non-x86-systems.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 457a73d346187c2cc5d599072f38676f18f130e0 Mon Sep 17 00:00:00 2001
From: Vivek Gautam <[email protected]>
Date: Sat, 22 Sep 2012 18:11:19 +0530
Subject: usb: host: xhci: Fix Null pointer dereferencing with 71c731a for
non-x86 systems
From: Vivek Gautam <[email protected]>
commit 457a73d346187c2cc5d599072f38676f18f130e0 upstream.
In 71c731a: usb: host: xhci: Fix Compliance Mode on SN65LVPE502CP Hardware
when extracting DMI strings (vendor or product_name) to mark them as quirk
we may get NULL pointer in case of non-x86 systems which won't define
CONFIG_DMI. Hence susbsequent strstr() calls crash while driver probing.
So, returning 'false' here in case we get a NULL vendor or product_name.
This is tested with ARM (exynos) system.
This patch should be backported to stable kernels as old as 3.6, that
contain the commit 71c731a296f1b08a3724bd1b514b64f1bda87a23 "usb: host:
xhci: Fix Compliance Mode on SN65LVPE502CP Hardware"
Signed-off-by: Vivek Gautam <[email protected]>
Signed-off-by: Sarah Sharp <[email protected]>
Reported-by: Sebastian Gottschall (DD-WRT) <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/host/xhci.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -470,6 +470,8 @@ static bool compliance_mode_recovery_tim
dmi_product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
dmi_sys_vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+ if (!dmi_product_name || !dmi_sys_vendor)
+ return false;
if (!(strstr(dmi_sys_vendor, "Hewlett-Packard")))
return false;
Patches currently in stable-queue which might be from [email protected]
are
queue-3.4/usb-host-xhci-fix-null-pointer-dereferencing-with-71c731a-for-non-x86-systems.patch
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