if vmw_execbuf_fence_commands() fails, The handle value will be
uninitialized and a bogus fence handle might be copied to user-space.
Fixes: 2724b2d54cda: ("drm/vmwgfx: Use new validation interface for the modesetting code v2")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Reviewed-by: Brian Paul <brianp@xxxxxxxxxx> #v1
Reviewed-by: Sinclair Yeh <syeh@xxxxxxxxxx> #v1
---
v2: Also initialize the ret local variable, to silence compilatior warnings.
Call vmw_execbuf_copy_fence_user regardless of the value of ret, to propagate
the correct error code to user-space.
---
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index b351fb5214d3..5e257a600cea 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -2554,8 +2554,8 @@ void vmw_kms_helper_validation_finish(struct vmw_private *dev_priv,
user_fence_rep)
{
struct vmw_fence_obj *fence = NULL;
- uint32_t handle;
- int ret;
+ uint32_t handle = 0;
+ int ret = 0;
if (file_priv || user_fence_rep || vmw_validation_has_bos(ctx) ||
out_fence)
--
2.19.0.rc1
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