Re: [PATCH 0/3] fbdev: Fix use-after-free caused by wrong fb_info cleanup in drivers
From: Javier Martinez Canillas <javierm@redhat.com>
Date: 2022-05-05 08:30:57
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Hello Thomas, On 5/5/22 10:16, Thomas Zimmermann wrote: [snip]
quoted
Patch #1 adds a WARN_ON() to framebuffer_release() to prevent the use-after-free to happen. Patch #2 and patch #3 fixes the simplefb and efifb drivers respectively, to free the resources at the correct place.From a quick look, vesafb seems to be affected as well.
Right, I wrongly assumed that we only cared about efifb and simplefb but forgot that vesafb is used when setting a VESA mode with vga=foo. I'll add it in a v2.
Best regards Thomas
-- Best regards, Javier Martinez Canillas Linux Engineering Red Hat