linux-kernel - [PATCH] Fix KDFONTOP 32bit compatibility layer

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 29 Jan 2012 00:28:58 +0100
From:	Samuel Thibault <samuel.thibault@...-lyon.org>
To:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arthur Taylor <art@...ed.ca>, Jiri Slaby <jslaby@...e.cz>,
	Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH] Fix KDFONTOP 32bit compatibility layer

KDFONTOP(GET) currently fails with EIO when being run in a 32bit
userland with a 64bit kernel if the font width is not 8. This is because
the compatibility layer introduced by e9216651 forces the addition of
the KD_FONT_FLAG_OLD flag, which makes con_font_get return EIO in such
case.  This flag should *not* be set for KDFONTOP, since it's actually
the whole point of this flag (see comment in con_font_set for instance).

Signed-off-by: Samuel Thibault <samuel.thibault@...-lyon.org>

diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 5e096f4..65447c5 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -1463,7 +1463,6 @@ compat_kdfontop_ioctl(struct compat_console_font_op __user *fontop,
 	if (!perm && op->op != KD_FONT_OP_GET)
 		return -EPERM;
 	op->data = compat_ptr(((struct compat_console_font_op *)op)->data);
-	op->flags |= KD_FONT_FLAG_OLD;
 	i = con_font_op(vc, op);
 	if (i)
 		return i;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/