From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
There is an off-by-one bounds check on the rcvlen causing a potential
out of bounds write on iidev->rcvmsg. Fix this by using the >= operator
on the bounds check rather than the > operator.
Addresses-Coverity: ("Out-of-bounds write")
Fixes: 0ba0c3c5d1c1 ("ipmi:ipmb: Add initial support for IPMI over IPMB")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
drivers/char/ipmi/ipmi_ipmb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/ipmi/ipmi_ipmb.c b/drivers/char/ipmi/ipmi_ipmb.c
index b10a1fd9c563..77ebec4ed28e 100644
--- a/drivers/char/ipmi/ipmi_ipmb.c
+++ b/drivers/char/ipmi/ipmi_ipmb.c
@@ -192,7 +192,7 @@ static int ipmi_ipmb_slave_cb(struct i2c_client *client,
break;
case I2C_SLAVE_WRITE_RECEIVED:
- if (iidev->rcvlen > sizeof(iidev->rcvmsg))
+ if (iidev->rcvlen >= sizeof(iidev->rcvmsg))
iidev->overrun = true;
else
iidev->rcvmsg[iidev->rcvlen++] = *val;
--
2.32.0
