From: AKASHI Takahiro <takahiro.akashi@linaro.org>
Date: Tue, 7 Nov 2023 00:05:47 +0000 (+0900)
Subject: firmware: scmi: correct a validity check against power domain id
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=4808d1633336a98f3c48a94a7e1fcd1e1030a324;p=u-boot.git

firmware: scmi: correct a validity check against power domain id

A power domain id on sandbox should be in the range from zero to
ARRAY_SIZE(scmi_pwdom) - 1. Correct the validity check logic.

Addresses-Coverity-ID: 467401 ("Out-of-bounds write")
Addresses-Coverity-ID: 467405 ("Out-of-bounds read")
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---

diff --git a/drivers/firmware/scmi/sandbox-scmi_agent.c b/drivers/firmware/scmi/sandbox-scmi_agent.c
index 9f5f497e0a..d131809626 100644
--- a/drivers/firmware/scmi/sandbox-scmi_agent.c
+++ b/drivers/firmware/scmi/sandbox-scmi_agent.c
@@ -576,7 +576,7 @@ static int sandbox_scmi_pwd_attribs(struct udevice *dev, struct scmi_msg *msg)
 	domain_id = *(u32 *)msg->in_msg;
 	out = (struct scmi_pwd_attrs_out *)msg->out_msg;
 
-	if (domain_id > ARRAY_SIZE(scmi_pwdom)) {
+	if (domain_id >= ARRAY_SIZE(scmi_pwdom)) {
 		out->status = SCMI_NOT_FOUND;
 
 		return 0;
@@ -613,7 +613,7 @@ static int sandbox_scmi_pwd_state_set(struct udevice *dev, struct scmi_msg *msg)
 	in = (struct scmi_pwd_state_set_in *)msg->in_msg;
 	status = (s32 *)msg->out_msg;
 
-	if (in->domain_id > ARRAY_SIZE(scmi_pwdom)) {
+	if (in->domain_id >= ARRAY_SIZE(scmi_pwdom)) {
 		*status = SCMI_NOT_FOUND;
 
 		return 0;
@@ -653,7 +653,7 @@ static int sandbox_scmi_pwd_state_get(struct udevice *dev, struct scmi_msg *msg)
 	domain_id = *(u32 *)msg->in_msg;
 	out = (struct scmi_pwd_state_get_out *)msg->out_msg;
 
-	if (domain_id > ARRAY_SIZE(scmi_pwdom)) {
+	if (domain_id >= ARRAY_SIZE(scmi_pwdom)) {
 		out->status = SCMI_NOT_FOUND;
 
 		return 0;
@@ -686,7 +686,7 @@ static int sandbox_scmi_pwd_name_get(struct udevice *dev, struct scmi_msg *msg)
 	domain_id = *(u32 *)msg->in_msg;
 	out = (struct scmi_pwd_name_get_out *)msg->out_msg;
 
-	if (domain_id > ARRAY_SIZE(scmi_pwdom)) {
+	if (domain_id >= ARRAY_SIZE(scmi_pwdom)) {
 		out->status = SCMI_NOT_FOUND;
 
 		return 0;