drm/amd/powerplay: fix off-by-one array bounds check

Submitted by Colin King on June 28, 2019, 2:24 p.m.

Details

Message ID 20190628142402.2771-1-colin.king@canonical.com
State New
Headers show
Series "drm/amd/powerplay: fix off-by-one array bounds check" ( rev: 1 ) in DRI devel

Not browsing as part of any series.

Commit Message

Colin King June 28, 2019, 2:24 p.m.
From: Colin Ian King <colin.king@canonical.com>

The array bounds check for index is currently off-by-one and should
be using >= rather than > on the upper bound. Fix this.

Addresses-Coverity: ("Out-of-bounds read")
Fixes: b3490673f905 ("drm/amd/powerplay: introduce the navi10 pptable implementation")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
index 27e5c80..f678700 100644
--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -210,7 +210,7 @@  static int navi10_workload_map[] = {
 static int navi10_get_smu_msg_index(struct smu_context *smc, uint32_t index)
 {
 	int val;
-	if (index > SMU_MSG_MAX_COUNT)
+	if (index >= SMU_MSG_MAX_COUNT)
 		return -EINVAL;
 
 	val = navi10_message_map[index];