diff options
| author | Wei Chen <harperchen1110@gmail.com> | 2023-03-15 12:22:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-06 13:10:41 +0300 |
| commit | 2a3562ea9d726675e3e38094a508f8dd56726bdc (patch) | |
| tree | 7215670a0dcd85b7698a50e292b104ab56b34126 /drivers/video | |
| parent | 9f2a69d5e6770a064a7ae9bdab7e9907a8d292ff (diff) | |
| download | linux-2a3562ea9d726675e3e38094a508f8dd56726bdc.tar.xz | |
fbdev: au1200fb: Fix potential divide by zero
[ Upstream commit 44a3b36b42acfc433aaaf526191dd12fbb919fdb ]
var->pixclock can be assigned to zero by user. Without
proper check, divide by zero would occur when invoking
macro PICOS2KHZ in au1200fb_fb_check_var.
Error out if var->pixclock is zero.
Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/au1200fb.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/video/fbdev/au1200fb.c b/drivers/video/fbdev/au1200fb.c index 81c315454428..b6b22fa4a8a0 100644 --- a/drivers/video/fbdev/au1200fb.c +++ b/drivers/video/fbdev/au1200fb.c @@ -1040,6 +1040,9 @@ static int au1200fb_fb_check_var(struct fb_var_screeninfo *var, u32 pixclock; int screen_size, plane; + if (!var->pixclock) + return -EINVAL; + plane = fbdev->plane; /* Make sure that the mode respect all LCD controller and |