Commit 5de30b28 authored by Denis Efremov's avatar Denis Efremov Committed by Greg Kroah-Hartman
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tty/vt: check allocation size in con_set_unimap() 



The vmemdup_user() function has no 2-factor argument form. Use array_size()
to check for the overflow.

Signed-off-by: default avatarDenis Efremov <efremov@linux.com>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200603102804.2110817-1-efremov@linux.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5ba12787

drivers/tty/vt/consolemap.c

+1 −1
Original line number Diff line number Diff line
@@ -542,7 +542,7 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list) 
	if (!ct)

		return 0;



	unilist = vmemdup_user(list, ct * sizeof(struct unipair));

	unilist = vmemdup_user(list, array_size(sizeof(struct unipair), ct));

	if (IS_ERR(unilist))

		return PTR_ERR(unilist);