Fix wacom touchscreens (rhbz 1918486)
Signed-off-by: Justin M. Forbes <jforbes@fedoraproject.org>
This commit is contained in:
parent
2c6af93c2f
commit
1284584cfc
|
@ -0,0 +1,85 @@
|
|||
From MAILER-DAEMON Wed Jan 27 14:42:50 2021
|
||||
From: Jason Gerecke <killertofu@gmail.com>
|
||||
To: linux-input@vger.kernel.org, Jiri Kosina <jikos@kernel.org>, Benjamin Tissoires <benjamin.tissoires@redhat.com>
|
||||
Cc: Jason Gerecke <jason.gerecke@wacom.com>, stable@vger.kernel.org, Ping Cheng <ping.cheng@wacom.com>
|
||||
Subject: [PATCH] HID: wacom: Correct NULL dereference on AES pen proximity
|
||||
Date: Thu, 21 Jan 2021 10:46:49 -0800
|
||||
Message-Id: <20210121184649.157189-1-jason.gerecke@wacom.com>
|
||||
List-ID: <linux-input.vger.kernel.org>
|
||||
X-Mailing-List: linux-input@vger.kernel.org
|
||||
MIME-Version: 1.0
|
||||
Content-Type: text/plain; charset="utf-8"
|
||||
Content-Transfer-Encoding: 7bit
|
||||
|
||||
The recent commit to fix a memory leak introduced an inadvertant NULL
|
||||
pointer dereference. The `wacom_wac->pen_fifo` variable was never
|
||||
intialized, resuling in a crash whenever functions tried to use it.
|
||||
Since the FIFO is only used by AES pens (to buffer events from pen
|
||||
proximity until the hardware reports the pen serial number) this would
|
||||
have been easily overlooked without testing an AES device.
|
||||
|
||||
This patch converts `wacom_wac->pen_fifo` over to a pointer (since the
|
||||
call to `devres_alloc` allocates memory for us) and ensures that we assign
|
||||
it to point to the allocated and initalized `pen_fifo` before the function
|
||||
returns.
|
||||
|
||||
Fixes: 37309f47e2f5 ("HID: wacom: Fix memory leakage caused by kfifo_alloc")
|
||||
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
|
||||
Tested-by: Ping Cheng <ping.cheng@wacom.com>
|
||||
CC: stable@vger.kernel.org # v4.19+
|
||||
Link: https://github.com/linuxwacom/input-wacom/issues/230
|
||||
---
|
||||
drivers/hid/wacom_sys.c | 7 ++++---
|
||||
drivers/hid/wacom_wac.h | 2 +-
|
||||
2 files changed, 5 insertions(+), 4 deletions(-)
|
||||
|
||||
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
|
||||
index e8acd235db2a..aa9e48876ced 100644
|
||||
--- a/drivers/hid/wacom_sys.c
|
||||
+++ b/drivers/hid/wacom_sys.c
|
||||
@@ -147,9 +147,9 @@ static int wacom_wac_pen_serial_enforce(struct hid_device *hdev,
|
||||
}
|
||||
|
||||
if (flush)
|
||||
- wacom_wac_queue_flush(hdev, &wacom_wac->pen_fifo);
|
||||
+ wacom_wac_queue_flush(hdev, wacom_wac->pen_fifo);
|
||||
else if (insert)
|
||||
- wacom_wac_queue_insert(hdev, &wacom_wac->pen_fifo,
|
||||
+ wacom_wac_queue_insert(hdev, wacom_wac->pen_fifo,
|
||||
raw_data, report_size);
|
||||
|
||||
return insert && !flush;
|
||||
@@ -1280,7 +1280,7 @@ static void wacom_devm_kfifo_release(struct device *dev, void *res)
|
||||
static int wacom_devm_kfifo_alloc(struct wacom *wacom)
|
||||
{
|
||||
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
|
||||
- struct kfifo_rec_ptr_2 *pen_fifo = &wacom_wac->pen_fifo;
|
||||
+ struct kfifo_rec_ptr_2 *pen_fifo;
|
||||
int error;
|
||||
|
||||
pen_fifo = devres_alloc(wacom_devm_kfifo_release,
|
||||
@@ -1297,6 +1297,7 @@ static int wacom_devm_kfifo_alloc(struct wacom *wacom)
|
||||
}
|
||||
|
||||
devres_add(&wacom->hdev->dev, pen_fifo);
|
||||
+ wacom_wac->pen_fifo = pen_fifo;
|
||||
|
||||
return 0;
|
||||
}
|
||||
diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
|
||||
index da612b6e9c77..195910dd2154 100644
|
||||
--- a/drivers/hid/wacom_wac.h
|
||||
+++ b/drivers/hid/wacom_wac.h
|
||||
@@ -342,7 +342,7 @@ struct wacom_wac {
|
||||
struct input_dev *pen_input;
|
||||
struct input_dev *touch_input;
|
||||
struct input_dev *pad_input;
|
||||
- struct kfifo_rec_ptr_2 pen_fifo;
|
||||
+ struct kfifo_rec_ptr_2 *pen_fifo;
|
||||
int pid;
|
||||
int num_contacts_left;
|
||||
u8 bt_features;
|
||||
--
|
||||
2.30.0
|
||||
|
||||
|
|
@ -855,6 +855,9 @@ Patch107: 0001-drm-nouveau-kms-handle-mDP-connectors.patch
|
|||
# rhbz 1918778
|
||||
Patch108: media-pwc-fix-the-urb-buffer-allocation.patch
|
||||
|
||||
#rhbz 1918486
|
||||
Patch109: hid-wacom-correct-null-dereference-on-aes-pen-proximity.patch
|
||||
|
||||
# END OF PATCH DEFINITIONS
|
||||
|
||||
%endif
|
||||
|
@ -2971,6 +2974,7 @@ fi
|
|||
* Wed Jan 27 08:07:48 CST 2021 Justin M. Forbes <jforbes@fedoraproject.org> - 5.10.11-200
|
||||
- Linux v5.10.11
|
||||
- Fix URB buffer allocation of pwc driver (rhbz 1918778)
|
||||
- Fix wacom touchscreens (rhbz 1918486)
|
||||
|
||||
* Sun Jan 24 11:28:41 CST 2021 Justin M. Forbes <jforbes@fedoraproject.org> - 5.10.10-200
|
||||
- Linux v5.10.10
|
||||
|
|
Loading…
Reference in New Issue