linux-kernel - Re: [PATCH 0/2] fbdev: Prevent null-ptr-deref in fb_videomode_to

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Message-ID: <62fff638-0898-4952-b159-d4c8a13e6d24@gmx.de>
Date: Thu, 29 May 2025 10:19:11 +0200
From: Helge Deller <deller@....de>
To: Murad Masimov <m.masimov@...integration.ru>
Cc: linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH 0/2] fbdev: Prevent null-ptr-deref in fb_videomode_to_var

On 4/28/25 17:34, Murad Masimov wrote:
> These patches fix the bug that leads to a null-ptr-deref if
> fb_videomode_to_var() fails to allocate memory. This bug is present in
> do_register_framebuffer() and fb_ser_var().
> 
> Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
> 
> Murad Masimov (2):
>    fbdev: Fix do_register_framebuffer to prevent null-ptr-deref in
>      fb_videomode_to_var
>    fbdev: Fix fb_ser_var to prevent null-ptr-deref in fb_videomode_to_var

I've added both patches to fbdev git tree (after fixing two small typos in commit message).

Thanks!
Helge



  
>   drivers/video/fbdev/core/fbmem.c | 22 ++++++++++++++--------
>   1 file changed, 14 insertions(+), 8 deletions(-)
> 
> --
> 2.39.2
>