4.19-stable review patch. If anyone has any objections, please let me know.
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From: Nikolay Kuratov kniv@yandex-team.ru
commit 26498b8d54373d31a621d7dec95c4bd842563b3b upstream.
Currently if condition (!bo and !vmw_kms_srf_ok()) was met we go to err_out with ret == 0. err_out dereferences vfb if ret == 0, but in our case vfb is still NULL.
Fix this by assigning sensible error to ret.
Found by Linux Verification Center (linuxtesting.org) with SVACE
Signed-off-by: Nikolay Kuratov kniv@yandex-team.ru Cc: stable@vger.kernel.org Fixes: 810b3e1683d0 ("drm/vmwgfx: Support topology greater than texture size") Signed-off-by: Zack Rusin zack.rusin@broadcom.com Link: https://patchwork.freedesktop.org/patch/msgid/20241002122429.1981822-1-kniv@... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -1468,6 +1468,7 @@ static struct drm_framebuffer *vmw_kms_f DRM_ERROR("Surface size cannot exceed %dx%d", dev_priv->texture_max_width, dev_priv->texture_max_height); + ret = -EINVAL; goto err_out; }