99f1abc34a
[ Upstream commit e421946be7d9bf545147bea8419ef8239cb7ca52 ]
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 | ||
| Kconfig | ||
| Makefile | ||
| aperture.c | ||
| cmdline.c | ||
| display_timing.c | ||
| hdmi.c | ||
| nomodeset.c | ||
| of_display_timing.c | ||
| of_videomode.c | ||
| sticore.c | ||
| vgastate.c | ||
| videomode.c | ||