Patch "drm/amd/display: Check pipe offset before setting vblank" has been added to the 5.10-stable tree

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

    drm/amd/display: Check pipe offset before setting vblank

to the 5.10-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-amd-display-check-pipe-offset-before-setting-vbl.patch
and it can be found in the queue-5.10 subdirectory.

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



commit 1e068258ed0868bb97fb69266448b65a3e0256f0
Author: Alex Hung <alex.hung@xxxxxxx>
Date:   Mon Apr 22 18:07:17 2024 -0600

    drm/amd/display: Check pipe offset before setting vblank
    
    [ Upstream commit 5396a70e8cf462ec5ccf2dc8de103c79de9489e6 ]
    
    pipe_ctx has a size of MAX_PIPES so checking its index before accessing
    the array.
    
    This fixes an OVERRUN issue reported by Coverity.
    
    Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@xxxxxxx>
    Acked-by: Wayne Lin <wayne.lin@xxxxxxx>
    Signed-off-by: Alex Hung <alex.hung@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c b/drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c
index 378cc11aa0476..3d8b2b127f3f5 100644
--- a/drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c
+++ b/drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c
@@ -211,8 +211,12 @@ bool dce110_vblank_set(struct irq_service *irq_service,
 						   info->ext_id);
 	uint8_t pipe_offset = dal_irq_src - IRQ_TYPE_VBLANK;
 
-	struct timing_generator *tg =
-			dc->current_state->res_ctx.pipe_ctx[pipe_offset].stream_res.tg;
+	struct timing_generator *tg;
+
+	if (pipe_offset >= MAX_PIPES)
+		return false;
+
+	tg = dc->current_state->res_ctx.pipe_ctx[pipe_offset].stream_res.tg;
 
 	if (enable) {
 		if (!tg || !tg->funcs->arm_vert_intr(tg, 2)) {




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