From 949fafcd7fa310e68bfd8828304150cdc9de5629 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Jun 2022 12:49:26 +0200 Subject: tty/vt: consolemap: check put_user() in con_get_unimap() Only the return value of copy_to_user() is checked in con_get_unimap(). Do the same for put_user() of the count too. Signed-off-by: Jiri Slaby Link: https://lore.kernel.org/r/20220607104946.18710-16-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/consolemap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/tty/vt/consolemap.c') diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c index 831450f2bfd1..92b5dddb00d9 100644 --- a/drivers/tty/vt/consolemap.c +++ b/drivers/tty/vt/consolemap.c @@ -813,7 +813,8 @@ unlock: console_unlock(); if (copy_to_user(list, unilist, min(ect, ct) * sizeof(*unilist))) ret = -EFAULT; - put_user(ect, uct); + if (put_user(ect, uct)) + ret = -EFAULT; kvfree(unilist); return ret ? ret : (ect <= ct) ? 0 : -ENOMEM; } -- cgit v1.2.3