Patch "drm/amdgpu: Off by one in dm_dmub_outbox1_low_irq()" has been added to the 5.18-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/amdgpu: Off by one in dm_dmub_outbox1_low_irq()

to the 5.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-off-by-one-in-dm_dmub_outbox1_low_irq.patch
and it can be found in the queue-5.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 7cf958a7cf255b654e1bcc0b888c261189eb576a
Author: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date:   Mon May 16 10:05:48 2022 +0300

    drm/amdgpu: Off by one in dm_dmub_outbox1_low_irq()
    
    [ Upstream commit a35faec3db0e13aac8ea720bc1a3503081dd5a3d ]
    
    The > ARRAY_SIZE() should be >= ARRAY_SIZE() to prevent an out of bounds
    access.
    
    Fixes: e27c41d5b068 ("drm/amd/display: Support for DMUB HPD interrupt handling")
    Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
    Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 62139ff35476..8dd03de7c277 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -771,7 +771,7 @@ static void dm_dmub_outbox1_low_irq(void *interrupt_params)
 
 		do {
 			dc_stat_get_dmub_notification(adev->dm.dc, &notify);
-			if (notify.type > ARRAY_SIZE(dm->dmub_thread_offload)) {
+			if (notify.type >= ARRAY_SIZE(dm->dmub_thread_offload)) {
 				DRM_ERROR("DM: notify type %d invalid!", notify.type);
 				continue;
 			}