| Message ID | 20210524090912.3989-1-johan@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | i2c: robotfuzz-osif: fix control-request directions | expand |
On Wed, Jun 23, 2021 at 10:52:04AM +0200, Johan Hovold wrote: > On Mon, May 24, 2021 at 11:09:12AM +0200, Johan Hovold wrote: > > The direction of the pipe argument must match the request-type direction > > bit or control requests may fail depending on the host-controller-driver > > implementation. > > > > Control transfers without a data stage are treated as OUT requests by > > the USB stack and should be using usb_sndctrlpipe(). Failing to do so > > will now trigger a warning. > > > > Fix the OSIFI2C_SET_BIT_RATE and OSIFI2C_STOP requests which erroneously > > used the osif_usb_read() helper and set the IN direction bit. > > > > Reported-by: syzbot+9d7dadd15b8819d73f41@syzkaller.appspotmail.com > > Fixes: 83e53a8f120f ("i2c: Add bus driver for for OSIF USB i2c device.") > > Cc: stable@vger.kernel.org # 3.14 > > Cc: Andrew Lunn <andrew@lunn.ch> > > Signed-off-by: Johan Hovold <johan@kernel.org> > > --- > > Wolfram, can you pick this one up for 5.14? Sorry, I thought Andrew was the maintainer of this driver and was waiting for his ack. But he is not, this driver is unmaintained. So, I trust you and picked it up now. Applied to for-current, thanks!
On Thu, Jun 24, 2021 at 10:10:17PM +0200, Wolfram Sang wrote: > Sorry, I thought Andrew was the maintainer of this driver and was > waiting for his ack. But he is not, this driver is unmaintained. So, I > trust you and picked it up now. > > Applied to for-current, thanks! Perfect, thanks! Johan
diff --git a/drivers/i2c/busses/i2c-robotfuzz-osif.c b/drivers/i2c/busses/i2c-robotfuzz-osif.c index a39f7d092797..66dfa211e736 100644 --- a/drivers/i2c/busses/i2c-robotfuzz-osif.c +++ b/drivers/i2c/busses/i2c-robotfuzz-osif.c @@ -83,7 +83,7 @@ static int osif_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, } } - ret = osif_usb_read(adapter, OSIFI2C_STOP, 0, 0, NULL, 0); + ret = osif_usb_write(adapter, OSIFI2C_STOP, 0, 0, NULL, 0); if (ret) { dev_err(&adapter->dev, "failure sending STOP\n"); return -EREMOTEIO; @@ -153,7 +153,7 @@ static int osif_probe(struct usb_interface *interface, * Set bus frequency. The frequency is: * 120,000,000 / ( 16 + 2 * div * 4^prescale). * Using dev = 52, prescale = 0 give 100KHz */ - ret = osif_usb_read(&priv->adapter, OSIFI2C_SET_BIT_RATE, 52, 0, + ret = osif_usb_write(&priv->adapter, OSIFI2C_SET_BIT_RATE, 52, 0, NULL, 0); if (ret) { dev_err(&interface->dev, "failure sending bit rate");
The direction of the pipe argument must match the request-type direction bit or control requests may fail depending on the host-controller-driver implementation. Control transfers without a data stage are treated as OUT requests by the USB stack and should be using usb_sndctrlpipe(). Failing to do so will now trigger a warning. Fix the OSIFI2C_SET_BIT_RATE and OSIFI2C_STOP requests which erroneously used the osif_usb_read() helper and set the IN direction bit. Reported-by: syzbot+9d7dadd15b8819d73f41@syzkaller.appspotmail.com Fixes: 83e53a8f120f ("i2c: Add bus driver for for OSIF USB i2c device.") Cc: stable@vger.kernel.org # 3.14 Cc: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/i2c/busses/i2c-robotfuzz-osif.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)