[PATCH 04/11] drm/qxl: Avoid double free on error

Frediano Ziglio fziglio at redhat.com
Wed Jun 3 04:09:12 PDT 2015

Is we are not able to get source bo object from handle we free
destination bo object and call cleanup code however destination
object was already inserted in reloc_info array (num_relocs was
already incremented) so on cleanup we free destination again.

Signed-off-by: Frediano Ziglio <fziglio at redhat.com>
Reviewed-by: Dave Airlie <airlied at redhat.com>
 drivers/gpu/drm/qxl/qxl_ioctl.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_ioctl.c b/drivers/gpu/drm/qxl/qxl_ioctl.c
index 230ab84..85b3808 100644
--- a/drivers/gpu/drm/qxl/qxl_ioctl.c
+++ b/drivers/gpu/drm/qxl/qxl_ioctl.c
@@ -240,8 +240,6 @@ static int qxl_process_single_command(struct qxl_device *qdev,
 				qxlhw_handle_to_bo(qdev, file_priv,
 						   reloc.src_handle, release);
 			if (!reloc_info[i].src_bo) {
-				if (reloc_info[i].dst_bo != cmd_bo)
-					drm_gem_object_unreference_unlocked(&reloc_info[i].dst_bo->gem_base);
 				ret = -EINVAL;
 				goto out_free_bos;

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