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Subject[PATCH 3.16 31/87] i2c: dev: fix potential memory leak in i2cdev_ioctl_rdwr
3.16.75-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Yingjoe Chen <yingjoe.chen@mediatek.com>

commit a0692f0eef91354b62c2b4c94954536536be5425 upstream.

If I2C_M_RECV_LEN check failed, msgs[i].buf allocated by memdup_user
will not be freed. Pump index up so it will be freed.

Fixes: 838bfa6049fb ("i2c-dev: Add support for I2C_M_RECV_LEN")
Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/i2c/i2c-dev.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -300,6 +300,7 @@ static noinline int i2cdev_ioctl_rdrw(st
rdwr_pa[i].buf[0] < 1 ||
rdwr_pa[i].len < rdwr_pa[i].buf[0] +
I2C_SMBUS_BLOCK_MAX) {
+ i++;
res = -EINVAL;
break;
}
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