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mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00
linux/drivers/tty/vt
Günther Noack 2f83e38a09 tty: Permit some TIOCL_SETSEL modes without CAP_SYS_ADMIN
With this, processes without CAP_SYS_ADMIN are able to use TIOCLINUX with
subcode TIOCL_SETSEL, in the selection modes TIOCL_SETPOINTER,
TIOCL_SELCLEAR and TIOCL_SELMOUSEREPORT.

TIOCL_SETSEL was previously changed to require CAP_SYS_ADMIN, as this IOCTL
let callers change the selection buffer and could be used to simulate
keypresses.  These three TIOCL_SETSEL selection modes, however, are safe to
use, as they do not modify the selection buffer.

This fixes a mouse support regression that affected Emacs (invisible mouse
cursor).

Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/ee3ec63269b43b34e1c90dd8c9743bf8@finder.org
Fixes: 8d1b43f6a6 ("tty: Restrict access to TIOCLINUX' copy-and-paste subcommands")
Signed-off-by: Günther Noack <gnoack@google.com>
Reviewed-by: Kees Cook <kees@kernel.org>
Link: https://lore.kernel.org/r/20250110142122.1013222-1-gnoack@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-01-13 06:46:50 +01:00
..
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
conmakehash.c tty: vt: conmakehash: remove non-portable code printing comment header 2024-08-13 11:06:29 +02:00
consolemap.c drivers/tty/vt: use standard array-copy-functions 2023-11-25 07:23:16 +00:00
cp437.uni tty: fix up a few remaining files without SPDX identifiers 2019-04-04 18:48:43 +02:00
defkeymap.c_shipped tty/vt: defkeymap.c_shipped, little unification with loadkeys 2022-06-10 13:34:17 +02:00
defkeymap.map tty: fix up a few remaining files without SPDX identifiers 2019-04-04 18:48:43 +02:00
keyboard.c vt: keyboard: Use led_set_brightness() in LED trigger activate() callback 2024-06-04 14:00:53 +02:00
Makefile vt: remove superfluous CONFIG_HW_CONSOLE 2024-01-27 19:03:51 -08:00
selection.c tty: Permit some TIOCL_SETSEL modes without CAP_SYS_ADMIN 2025-01-13 06:46:50 +01:00
vc_screen.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
vt_ioctl.c tty: vt: pass vc_resize_user as a parameter 2024-01-27 18:08:52 -08:00
vt.c tty: Permit some TIOCL_SETSEL modes without CAP_SYS_ADMIN 2025-01-13 06:46:50 +01:00