On 2018.11.20 20:24:38 +0000, Chris Wilson wrote:
> Found by smatch:
>
> drivers/gpu/drm/i915/gvt/gtt.c:2452 intel_vgpu_destroy_ggtt_mm() error:
> dereferencing freed memory 'pos'
>
> Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
> Cc: Zhenyu Wang <zhen...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/gvt/gtt.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
> index 58e166effa45..c7103dd2d8d5 100644
> --- a/drivers/gpu/drm/i915/gvt/gtt.c
> +++ b/drivers/gpu/drm/i915/gvt/gtt.c
> @@ -2447,10 +2447,11 @@ static void intel_vgpu_destroy_all_ppgtt_mm(struct
> intel_vgpu *vgpu)
>
> static void intel_vgpu_destroy_ggtt_mm(struct intel_vgpu *vgpu)
> {
> - struct intel_gvt_partial_pte *pos;
> + struct intel_gvt_partial_pte *pos, *next;
>
> - list_for_each_entry(pos,
> - &vgpu->gtt.ggtt_mm->ggtt_mm.partial_pte_list, list) {
> + list_for_each_entry_safe(pos, next,
> + &vgpu->gtt.ggtt_mm->ggtt_mm.partial_pte_list,
> + list) {
> gvt_dbg_mm("partial PTE update on hold 0x%lx : 0x%llx\n",
> pos->offset, pos->data);
> kfree(pos);Reviewed-by: Zhenyu Wang <zhen...@linux.intel.com> Thanks! I should really run check against each one when apply.. -- Open Source Technology Center, Intel ltd. $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
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