Commit 7bea5618 authored by Yingjoe Chen's avatar Yingjoe Chen Committed by Greg Kroah-Hartman

i2c: dev: fix potential memory leak in i2cdev_ioctl_rdwr

[ Upstream commit a0692f0eef91354b62c2b4c94954536536be5425 ]

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: 838bfa60 ("i2c-dev: Add support for I2C_M_RECV_LEN")
Signed-off-by: 's avatarYingjoe Chen <yingjoe.chen@mediatek.com>
Signed-off-by: 's avatarWolfram Sang <wsa@the-dreams.de>
Signed-off-by: 's avatarSasha Levin <sashal@kernel.org>
parent 197501af
......@@ -283,6 +283,7 @@ static noinline int i2cdev_ioctl_rdwr(struct i2c_client *client,
msgs[i].len < 1 || msgs[i].buf[0] < 1 ||
msgs[i].len < msgs[i].buf[0] +
I2C_SMBUS_BLOCK_MAX) {
i++;
res = -EINVAL;
break;
}
......
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