add null-check on function pointer before dereference on ops->cursor
Reported-by: syzbot+b67aaae8d3a927f68...@syzkaller.appspotmail.com
Signed-off-by: Du Cheng <duche...@gmail.com>
---
drivers/video/fbdev/core/fbcon.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 44a5cd2f54cc..3406067985b1 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -1333,6 +1333,9 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
+ if (!ops->cursor)
+ return;
+
ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
get_color(vc, info, c, 0));
}
--
2.27.0
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