This is a note to let you know that I've just added the patch titled
USB: CDC ACM: Fix NULL pointer dereference
to the 3.0-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-cdc-acm-fix-null-pointer-dereference.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 99f347caa4568cb803862730b3b1f1942639523f Mon Sep 17 00:00:00 2001
From: Sven Schnelle <[email protected]>
Date: Fri, 17 Aug 2012 21:43:43 +0200
Subject: USB: CDC ACM: Fix NULL pointer dereference
From: Sven Schnelle <[email protected]>
commit 99f347caa4568cb803862730b3b1f1942639523f upstream.
If a device specifies zero endpoints in its interface descriptor,
the kernel oopses in acm_probe(). Even though that's clearly an
invalid descriptor, we should test wether we have all endpoints.
This is especially bad as this oops can be triggered by just
plugging a USB device in.
Signed-off-by: Sven Schnelle <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/class/cdc-acm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1043,7 +1043,8 @@ skip_normal_probe:
}
- if (data_interface->cur_altsetting->desc.bNumEndpoints < 2)
+ if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
+ control_interface->cur_altsetting->desc.bNumEndpoints == 0)
return -EINVAL;
epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/usb-cdc-acm-fix-null-pointer-dereference.patch
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