[PATCH 3/3] drm/i915/gvt: use array to avoid potential buffer overflow
Xinyun Liu
xinyun.liu at intel.com
Thu Jun 7 02:49:40 UTC 2018
Signed-off-by: Xinyun Liu <xinyun.liu at intel.com>
Reviewed-by: Min He <min.he at intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao at intel.com>
---
drivers/gpu/drm/i915/gvt/execlist.h | 13 +++++--------
drivers/gpu/drm/i915/gvt/scheduler.c | 5 ++---
2 files changed, 7 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/execlist.h b/drivers/gpu/drm/i915/gvt/execlist.h
index 427e40e64d41..714d709829a2 100644
--- a/drivers/gpu/drm/i915/gvt/execlist.h
+++ b/drivers/gpu/drm/i915/gvt/execlist.h
@@ -146,14 +146,11 @@ struct execlist_ring_context {
u32 nop4;
u32 lri_cmd_2;
struct execlist_mmio_pair ctx_timestamp;
- struct execlist_mmio_pair pdp3_UDW;
- struct execlist_mmio_pair pdp3_LDW;
- struct execlist_mmio_pair pdp2_UDW;
- struct execlist_mmio_pair pdp2_LDW;
- struct execlist_mmio_pair pdp1_UDW;
- struct execlist_mmio_pair pdp1_LDW;
- struct execlist_mmio_pair pdp0_UDW;
- struct execlist_mmio_pair pdp0_LDW;
+ /*
+ * pdps[8]={ pdp3_UDW, pdp3_LDW, pdp2_UDW, pdp2_LDW,
+ * pdp1_UDW, pdp1_LDW, pdp0_UDW, pdp0_LDW}
+ */
+ struct execlist_mmio_pair pdps[8];
};
struct intel_vgpu_elsp_dwords {
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c
index cf5a22cb6e06..462cf560492e 100644
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -45,11 +45,10 @@ static void set_context_pdp_root_pointer(
struct execlist_ring_context *ring_context,
u32 pdp[8])
{
- struct execlist_mmio_pair *pdp_pair = &ring_context->pdp3_UDW;
int i;
for (i = 0; i < 8; i++)
- pdp_pair[i].val = pdp[7 - i];
+ ring_context->pdps[i].val = pdp[7 - i];
}
static void update_shadow_pdps(struct intel_vgpu_workload *workload)
@@ -1230,7 +1229,7 @@ static void read_guest_pdps(struct intel_vgpu *vgpu,
u64 gpa;
int i;
- gpa = ring_context_gpa + RING_CTX_OFF(pdp3_UDW.val);
+ gpa = ring_context_gpa + RING_CTX_OFF(pdps[0].val);
for (i = 0; i < 8; i++)
intel_gvt_hypervisor_read_gpa(vgpu,
--
2.17.1
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