linux-sg2042/drivers/video
Fullway Wang f329523f6a fbdev: sis: Error out if pixclock equals zero
[ Upstream commit e421946be7 ]

The userspace program could pass any values to the driver through
ioctl() interface. If the driver doesn't check the value of pixclock,
it may cause divide-by-zero error.

In sisfb_check_var(), var->pixclock is used as a divisor to caculate
drate before it is checked against zero. Fix this by checking it
at the beginning.

This is similar to CVE-2022-3061 in i740fb which was fixed by
commit 15cf0b8.

Signed-off-by: Fullway Wang <fullwaywang@outlook.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-03-01 13:26:25 +01:00
..
backlight backlight: gpio_backlight: Drop output GPIO direction check for initial power state 2023-09-19 12:27:59 +02:00
console
fbdev fbdev: sis: Error out if pixclock equals zero 2024-03-01 13:26:25 +01:00
logo
Kconfig
Makefile
aperture.c video/aperture: Move vga handling to pci function 2023-08-30 16:10:58 +02:00
display_timing.c
hdmi.c
of_display_timing.c
of_videomode.c
vgastate.c
videomode.c