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

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: default avatarYingjoe Chen <yingjoe.chen@mediatek.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 197501af

drivers/i2c/i2c-dev.c

+1 −0
Original line number Diff line number Diff line
@@ -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;

			}