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authorMichel Thierry <michel.thierry@intel.com>2014-09-09 16:04:43 +0400
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-09-19 16:41:16 +0400
commitcf303626748e0a5c059e453d025539583d870116 (patch)
tree377e1c45d9ba381b44d70bb3b81adea0686b9447 /drivers/gpu/drm/i915/i915_gem_evict.c
parenta1e470d421f68d69bf35c1ed316a861625010eab (diff)
downloadlinux-cf303626748e0a5c059e453d025539583d870116.tar.xz
drm/i915: fix another use-after-free in i915_gem_evict_everything
Also here, i915_gem_evict_vm causes an unbind, which can end up dropping the last ref to the ppgtt. Triggered by igt gem_evict_everything test. Testcase: igt/gem_evict_everything Signed-off-by: Michel Thierry <michel.thierry@intel.com> Reviewed-by: Chris Wilson <chris@cris-wilsonc.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_evict.c')
-rw-r--r--drivers/gpu/drm/i915/i915_gem_evict.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c
index bbf4b12d842e..886ff2ee7a28 100644
--- a/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -243,7 +243,7 @@ int
i915_gem_evict_everything(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
- struct i915_address_space *vm;
+ struct i915_address_space *vm, *v;
bool lists_empty = true;
int ret;
@@ -270,7 +270,7 @@ i915_gem_evict_everything(struct drm_device *dev)
i915_gem_retire_requests(dev);
/* Having flushed everything, unbind() should never raise an error */
- list_for_each_entry(vm, &dev_priv->vm_list, global_link)
+ list_for_each_entry_safe(vm, v, &dev_priv->vm_list, global_link)
WARN_ON(i915_gem_evict_vm(vm, false));
return 0;