[PATCH v2 20/23] staging: comedi: vmk80xx: sanity check context used to get the boardinfo

H Hartley Sweeten hsweeten at visionengravers.com
Thu Jun 18 17:54:57 UTC 2015


As done in all the comedi drivers that auto attach, sanity check the
passed context that is used to get the boardinfo.

Signed-off-by: H Hartley Sweeten <hsweeten at visionengravers.com>
---
v2: new patch

 drivers/staging/comedi/drivers/vmk80xx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/comedi/drivers/vmk80xx.c b/drivers/staging/comedi/drivers/vmk80xx.c
index a87b152..3af075a 100644
--- a/drivers/staging/comedi/drivers/vmk80xx.c
+++ b/drivers/staging/comedi/drivers/vmk80xx.c
@@ -795,7 +795,10 @@ static int vmk80xx_auto_attach(struct comedi_device *dev,
 	struct vmk80xx_private *devpriv;
 	int ret;
 
-	board = &vmk80xx_boardinfo[context];
+	if (context < ARRAY_SIZE(vmk80xx_boardinfo))
+		board = &vmk80xx_boardinfo[context];
+	if (!board)
+		return -ENODEV;
 	dev->board_ptr = board;
 	dev->board_name = board->name;
 
-- 
2.4.3



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