| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 200/201] drm/amdgpu: Off by one in dm_dmub_outbox1_low_irq() | Date | Wed, 27 Jul 2022 18:11:44 +0200 |
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From: Dan Carpenter <dan.carpenter@oracle.com>
commit a35faec3db0e13aac8ea720bc1a3503081dd5a3d upstream.
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@amd.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -757,7 +757,7 @@ static void dm_dmub_outbox1_low_irq(void if (irq_params->irq_src == DC_IRQ_SOURCE_DMCUB_OUTBOX) { do { dc_stat_get_dmub_notification(adev->dm.dc, ¬ify); - if (notify.type > ARRAY_SIZE(dm->dmub_thread_offload)) { + if (notify.type >= ARRAY_SIZE(dm->dmub_thread_offload)) { DRM_ERROR("DM: notify type %d larger than the array size %ld !", notify.type, ARRAY_SIZE(dm->dmub_thread_offload)); continue;
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