[ 064/147] staging: comedi: s626: dont dereference insn->data

Ben Hutchings
2012-10-14T14:55:41Z

From: Ian Abbott <abbotti@mev.co.uk>

commit b655c2c4782ed3e2e71d2608154e295a3e860311 upstream.

`s626_enc_insn_config()` is incorrectly dereferencing `insn->data` which
is a pointer to user memory. It should be dereferencing the separate
`data` parameter that points to a copy of the data in kernel memory.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/staging/comedi/drivers/s626.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c
index e1d10f3..430e26b 100644
--- a/drivers/staging/comedi/drivers/s626.c
+++ b/drivers/staging/comedi/drivers/s626.c
@@ -1825,7 +1825,7 @@ static int s626_enc_insn_config(struct comedi_device *dev,
/* (data==NULL) ? (Preloadvalue=0) : (Preloadvalue=data[0]); */

k->SetMode(dev, k, Setup, TRUE);
- Preload(dev, k, *(insn->data));
+ Preload(dev, k, data[0]);
k->PulseIndex(dev, k);
SetLatchSource(dev, k, valueSrclatch);
k->SetEnable(dev, k, (uint16_t) (enab != 0));