Messages in this thread Patch in this message | | | From | Jiri Slaby <> | Subject | [PATCH 14/17] vt: keyboard, union perm checks in vt_do_kdgkb_ioctl | Date | Thu, 29 Oct 2020 12:32:19 +0100 |
| |
Do the permission check on a single place. That is where perm is really checked.
Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- drivers/tty/vt/keyboard.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c index 648bdfb05e25..1de0d5217aed 100644 --- a/drivers/tty/vt/keyboard.c +++ b/drivers/tty/vt/keyboard.c @@ -2040,9 +2040,6 @@ int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm) char *kbs; int ret; - if (!capable(CAP_SYS_TTY_CONFIG)) - perm = 0; - if (get_user(kb_func, &user_kdgkb->kb_func)) return -EFAULT; @@ -2067,7 +2064,7 @@ int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm) break; } case KDSKBSENT: - if (!perm) + if (!perm || !capable(CAP_SYS_TTY_CONFIG)) return -EPERM; kbs = strndup_user(user_kdgkb->kb_string, -- 2.29.1
| |