6.1-stable review patch. If anyone has any objections, please let me know.
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From: Alex Hung alex.hung@amd.com
[ 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@amd.com Acked-by: Wayne Lin wayne.lin@amd.com Signed-off-by: Alex Hung alex.hung@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../drm/amd/display/dc/irq/dce110/irq_service_dce110.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
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 44649db5f3e32..5646b7788f02e 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)) {