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

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Message-ID: <20250428153407.3743416-1-m.masimov@mt-integration.ru>
Date: Mon, 28 Apr 2025 18:34:05 +0300
From: Murad Masimov <m.masimov@...integration.ru>
To: Simona Vetter <simona@...ll.ch>
CC: Helge Deller <deller@....de>, Murad Masimov <m.masimov@...integration.ru>,
	Thomas Weißschuh <linux@...ssschuh.net>,
	<linux-fbdev@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <lvc-project@...uxtesting.org>
Subject: [PATCH 0/2] fbdev: Prevent null-ptr-deref in fb_videomode_to_var

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

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

--
2.39.2