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| author | Johan Hovold <johan@kernel.org> | 2020-01-10 12:01:27 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-29 15:02:38 +0100 |
| commit | 0411b242274fabe83298c0242916216b40b2350f (patch) | |
| tree | 0e00602a680153efc61fbae2cc78cbeb93d4eea6 | |
| parent | 1130377fb5a8095a13c23018edadbabbec7f7fef (diff) | |
| download | linux-stable-0411b242274fabe83298c0242916216b40b2350f.tar.gz linux-stable-0411b242274fabe83298c0242916216b40b2350f.tar.bz2 linux-stable-0411b242274fabe83298c0242916216b40b2350f.zip | |
Input: sur40 - fix interface sanity checks
commit 6b32391ed675827f8425a414abbc6fbd54ea54fe upstream.
Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.
This in turn could cause the driver to misbehave or trigger a WARN() in
usb_submit_urb() that kernels with panic_on_warn set would choke on.
Fixes: bdb5c57f209c ("Input: add sur40 driver for Samsung SUR40 (aka MS Surface 2.0/Pixelsense)")
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Vladis Dronov <vdronov@redhat.com>
Link: https://lore.kernel.org/r/20191210113737.4016-8-johan@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/input/touchscreen/sur40.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c index f16f8358c70a..98e03d0ca03c 100644 --- a/drivers/input/touchscreen/sur40.c +++ b/drivers/input/touchscreen/sur40.c @@ -537,7 +537,7 @@ static int sur40_probe(struct usb_interface *interface, int error; /* Check if we really have the right interface. */ - iface_desc = &interface->altsetting[0]; + iface_desc = interface->cur_altsetting; if (iface_desc->desc.bInterfaceClass != 0xFF) return -ENODEV; |