[PATCH] drivers: video: fbcon: fix NULL dereference in fbcon_cursor()

add null-check on function pointer before dereference on ops->cursor

Reported-by: syzbot+b67aaae8d3a927f68d20@syzkaller.appspotmail.com Signed-off-by: Du Cheng ducheng2@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)); }