From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
commit e0354d147e5889b5faa12e64fa38187aed39aad4 upstream.
The end of buffer check is off-by-one since the check is against
an index that is pre-incremented before a store to buf[]. Fix this
adjusting the bounds check appropriately.
Addresses-Coverity: ("Out-of-bounds write")
Fixes: 51bd6f291583 ("Add support for IPMB driver")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Message-Id: <20200114144031.358003-1-colin.king@xxxxxxxxxxxxx>
Reviewed-by: Asmaa Mnebhi <asmaa@xxxxxxxxxxxx>
Signed-off-by: Corey Minyard <cminyard@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/ipmi/ipmb_dev_int.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/char/ipmi/ipmb_dev_int.c
+++ b/drivers/char/ipmi/ipmb_dev_int.c
@@ -253,7 +253,7 @@ static int ipmb_slave_cb(struct i2c_clie
break;
case I2C_SLAVE_WRITE_RECEIVED:
- if (ipmb_dev->msg_idx >= sizeof(struct ipmb_msg))
+ if (ipmb_dev->msg_idx >= sizeof(struct ipmb_msg) - 1)
break;
buf[++ipmb_dev->msg_idx] = *val;
