Messages in this thread Patch in this message | | | From | Colin King <> | Subject | [PATCH] rsi: fix a dereference on adapter before it has been null checked | Date | Fri, 8 Sep 2017 16:24:52 +0100 |
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From: Colin Ian King <colin.king@canonical.com>
The assignment of dev is dereferencing adapter before adapter has been null checked, potentially leading to a null pointer dereference. Fix this by simply moving the assignment of dev to a later point after the sanity null check of adapter.
Detected by CoverityScan CID#1398383 ("Dereference before null check")
Fixes: dad0d04fa7ba ("rsi: Add RS9113 wireless driver") Signed-off-by: Colin Ian King <colin.king@canonical.com> --- drivers/net/wireless/rsi/rsi_91x_usb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/rsi/rsi_91x_usb.c b/drivers/net/wireless/rsi/rsi_91x_usb.c index 81df09dd2636..08730227cd18 100644 --- a/drivers/net/wireless/rsi/rsi_91x_usb.c +++ b/drivers/net/wireless/rsi/rsi_91x_usb.c @@ -73,8 +73,7 @@ static int rsi_write_multiple(struct rsi_hw *adapter, u8 *data, u32 count) { - struct rsi_91x_usbdev *dev = - (struct rsi_91x_usbdev *)adapter->rsi_dev; + struct rsi_91x_usbdev *dev; if (!adapter) return -ENODEV; @@ -82,6 +81,7 @@ static int rsi_write_multiple(struct rsi_hw *adapter, if (endpoint == 0) return -EINVAL; + dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; if (dev->write_fail) return -ENETDOWN; -- 2.14.1
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