[PATCH] drm/i915: Use after free in error path in intel_vgpu_create_workload()
Dan Carpenter
dan.carpenter at oracle.com
Thu Aug 8 10:32:36 UTC 2019
We can't free "workload" until after the printk or it's a use after
free.
Fixes: 2089a76ade90 ("drm/i915/gvt: Checking workload's gma earlier")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
drivers/gpu/drm/i915/gvt/scheduler.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c
index 32ae6b5b7e16..ac1dbb176874 100644
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -1525,9 +1525,9 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu, int ring_id,
if (!intel_gvt_ggtt_validate_range(vgpu,
workload->wa_ctx.indirect_ctx.guest_gma,
workload->wa_ctx.indirect_ctx.size)) {
- kmem_cache_free(s->workloads, workload);
gvt_vgpu_err("invalid wa_ctx at: 0x%lx\n",
workload->wa_ctx.indirect_ctx.guest_gma);
+ kmem_cache_free(s->workloads, workload);
return ERR_PTR(-EINVAL);
}
}
@@ -1539,9 +1539,9 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu, int ring_id,
if (!intel_gvt_ggtt_validate_range(vgpu,
workload->wa_ctx.per_ctx.guest_gma,
CACHELINE_BYTES)) {
- kmem_cache_free(s->workloads, workload);
gvt_vgpu_err("invalid per_ctx at: 0x%lx\n",
workload->wa_ctx.per_ctx.guest_gma);
+ kmem_cache_free(s->workloads, workload);
return ERR_PTR(-EINVAL);
}
}
--
2.20.1
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