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| author | Colin Ian King <colin.king@canonical.com> | 2021-10-05 16:16:11 +0100 |
|---|---|---|
| committer | Corey Minyard <cminyard@mvista.com> | 2021-10-05 10:39:37 -0500 |
| commit | 39ce73504695500e043d2851e3d4938fcae89399 (patch) | |
| tree | 51a30c9c426a49d46cd5a3ff9d3c35b454d1bc39 /drivers/char | |
| parent | 8332cd4936ed93df42add6541f740ce937e7a5bc (diff) | |
| download | linux-39ce73504695500e043d2851e3d4938fcae89399.tar.bz2 | |
ipmi: ipmb: Fix off-by-one size check on rcvlen
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@canonical.com>
Message-Id: <20211005151611.305383-1-colin.king@canonical.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/ipmi/ipmi_ipmb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/ipmi/ipmi_ipmb.c b/drivers/char/ipmi/ipmi_ipmb.c index 742ae10166af..856e432fa04c 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; |