On 03/19/2018 04:23 PM, Chris Wilson wrote:
Quoting Gustavo A. R. Silva (2018-03-19 20:50:12)
Hi Chris,
On 03/19/2018 03:38 PM, Chris Wilson wrote:
Quoting Gustavo A. R. Silva (2018-03-19 19:30:53)
_workload_ is being dereferenced before it is null checked, hence
there is a potential null pointer dereference.
Fix this by moving the pointer dereference after _workload_ has
been null checked.
The checks are misleading and not required.
All of them?
if (!workload || !reg_state || workload->ring_id != RCS)
return;
workload can not be NULL (dereference in caller), reg_state can not be
NULL (by construct from kmap()).
It may be not an RCS ring through
I got it.
I'll send the following patch then:
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -74,7 +74,7 @@ static void sr_oa_regs(struct intel_vgpu_workload
*workload,
i915_mmio_reg_offset(EU_PERF_CNTL6),
};
- if (!workload || !reg_state || workload->ring_id != RCS)
+ if(workload->ring_id != RCS)
return;
if (save) {
Thanks
--
Gustavo
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