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authorFullway Wang2024-01-18 14:24:43 +0800
committerHelge Deller2024-01-21 09:00:14 +0100
commite421946be7d9bf545147bea8419ef8239cb7ca52 (patch)
tree281edc1f9f7a2086646371bd19275443b19273e2 /drivers/vfio
parent04e5eac8f3ab2ff52fa191c187a46d4fdbc1e288 (diff)
fbdev: sis: Error out if pixclock equals zero
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>
Diffstat (limited to 'drivers/vfio')
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