[PATCH 1/2] drm/client: Fix memory leak in drm_client_target_cloned

[Javier Martinez Canillas]

Jocelyn Falempe <jfalempe at redhat.com> writes:

Hello Jocelyn,

> dmt_mode is allocated and never freed in this function.
> It was found with the ast driver, but most drivers using generic fbdev
> setup are probably affected.
>
> This fixes the following kmemleak report:
>   backtrace:
>     [<00000000b391296d>] drm_mode_duplicate+0x45/0x220 [drm]
>     [<00000000e45bb5b3>] drm_client_target_cloned.constprop.0+0x27b/0x480 [drm]
>     [<00000000ed2d3a37>] drm_client_modeset_probe+0x6bd/0xf50 [drm]
>     [<0000000010e5cc9d>] __drm_fb_helper_initial_config_and_unlock+0xb4/0x2c0 [drm_kms_helper]
>     [<00000000909f82ca>] drm_fbdev_client_hotplug+0x2bc/0x4d0 [drm_kms_helper]
>     [<00000000063a69aa>] drm_client_register+0x169/0x240 [drm]
>     [<00000000a8c61525>] ast_pci_probe+0x142/0x190 [ast]
>     [<00000000987f19bb>] local_pci_probe+0xdc/0x180
>     [<000000004fca231b>] work_for_cpu_fn+0x4e/0xa0
>     [<0000000000b85301>] process_one_work+0x8b7/0x1540
>     [<000000003375b17c>] worker_thread+0x70a/0xed0
>     [<00000000b0d43cd9>] kthread+0x29f/0x340
>     [<000000008d770833>] ret_from_fork+0x1f/0x30
> unreferenced object 0xff11000333089a00 (size 128):
>
> cc: <stable at vger.kernel.org>
> Fixes: 1d42bbc8f7f9 ("drm/fbdev: fix cloning on fbcon")
> Reported-by: Zhang Yi <yizhan at redhat.com>
> Signed-off-by: Jocelyn Falempe <jfalempe at redhat.com>
> ---

The patch looks good to me.

Reviewed-by: Javier Martinez Canillas <javierm at redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat