[syzbot] general protection fault in drm_client_buffer_vunmap

[Thomas Zimmermann]

#syz fix: drm/fb-helper: only unmap if buffer not null

Am 11.04.21 um 14:01 schrieb syzbot:
> #syz fix: drm/fb-helper: only unmap if buffer not null

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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