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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
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backlight | ||
console | ||
fbdev | ||
logo | ||
aperture.c | ||
cmdline.c | ||
display_timing.c | ||
hdmi.c | ||
Kconfig | ||
Makefile | ||
nomodeset.c | ||
of_display_timing.c | ||
of_videomode.c | ||
sticore.c | ||
vgastate.c | ||
videomode.c |