1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/i2c/i2c-stub.c b/drivers/i2c/i2c-stub.c
index e815c6067ff3..d241aa295d96 100644
--- a/drivers/i2c/i2c-stub.c
+++ b/drivers/i2c/i2c-stub.c
@@ -226,6 +226,8 @@ static s32 stub_xfer(struct i2c_adapter *adap, u16 addr, unsigned short flags,
                  * We ignore banks here, because banked chips don't use I2C
                  * block transfers
                  */
+                if (data->block[0] > 256 - command)     /* Avoid overrun */
+                        data->block[0] = 256 - command;
                 len = data->block[0];
                 if (read_write == I2C_SMBUS_WRITE) {
                         for (i = 0; i < len; i++) {