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| /rk3399_rockchip-uboot/drivers/video/ |
| H A D | console_normal.c | 7682736c891d2b6f0cce167f4ecd55d2df0f562f Mon Apr 10 02:02:20 UTC 2017 eric.gao@rock-chips.com <eric.gao@rock-chips.com> video: Fix crash when scroll screen
After enabling log printing to lcd, when the screen starts
scrolling, system crashes. Log is shown as bellow:
"Synchronous Abort" handler, esr 0x96000045
"Synchronous Abort" handler, esr 0x96000045
Checking the source code, we found that the variable "pixels"
gets a wrong value:
int pixels = VIDEO_FONT_HEIGHT * vid_priv->line_length;
"pixels" here means the value of pixels for a character, rather
than the bytes for a character. So the variable "pixels" is 4
times bigger than it's exact value, which will cause the memory
overflow when the cpu runs the following code:
for (i = 0; i < pixels; i++)
*dst++ = clr; <<----
Signed-off-by: Eric Gao <eric.gao@rock-chips.com>
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