projects / thirdparty / kernel / stable-queue.git / blame
| Commit | Line | Data |
|---|---|---|
| 90594201 GKH |
1 | From ba340d7b83703768ce566f53f857543359aa1b98 Mon Sep 17 00:00:00 2001 |
| 2 | From: Johan Hovold <johan@kernel.org> | |
| 3 | Date: Thu, 16 Mar 2017 11:39:29 -0700 | |
| 4 | Subject: Input: hanwang - validate number of endpoints before using them | |
| 5 | ||
| 6 | From: Johan Hovold <johan@kernel.org> | |
| 7 | ||
| 8 | commit ba340d7b83703768ce566f53f857543359aa1b98 upstream. | |
| 9 | ||
| 10 | Make sure to check the number of endpoints to avoid dereferencing a | |
| 11 | NULL-pointer should a malicious device lack endpoints. | |
| 12 | ||
| 13 | Fixes: bba5394ad3bd ("Input: add support for Hanwang tablets") | |
| 14 | Signed-off-by: Johan Hovold <johan@kernel.org> | |
| 15 | Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> | |
| 16 | Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| 17 | ||
| 18 | --- | |
| 19 | drivers/input/tablet/hanwang.c | 3 +++ | |
| 20 | 1 file changed, 3 insertions(+) | |
| 21 | ||
| 22 | --- a/drivers/input/tablet/hanwang.c | |
| 23 | +++ b/drivers/input/tablet/hanwang.c | |
| 24 | @@ -340,6 +340,9 @@ static int hanwang_probe(struct usb_inte | |
| 25 | int error; | |
| 26 | int i; | |
| 27 | ||
| 28 | + if (intf->cur_altsetting->desc.bNumEndpoints < 1) | |
| 29 | + return -ENODEV; | |
| 30 | + | |
| 31 | hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL); | |
| 32 | input_dev = input_allocate_device(); | |
| 33 | if (!hanwang || !input_dev) { |