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linux/drivers/tty/vt
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Jeongjun Park b3959d5eca vt: prevent kernel-infoleak in con_font_get() 
commit f956052e00 upstream.

font.data may not initialize all memory spaces depending on the implementation
of vc->vc_sw->con_font_get. This may cause info-leak, so to prevent this, it
is safest to modify it to initialize the allocated memory space to 0, and it
generally does not affect the overall performance of the system.

Cc: stable@vger.kernel.org
Reported-by: syzbot+955da2d57931604ee691@syzkaller.appspotmail.com
Fixes: 05e2600cb0 ("VT: Bump font size limitation to 64x128 pixels")
Signed-off-by: Jeongjun Park <aha310510@gmail.com>
Link: https://lore.kernel.org/r/20241010174619.59662-1-aha310510@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-11-08 16:25:56 +01:00
..
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
conmakehash.c tty: vt: move conmakehash to drivers/tty/vt/ from scripts/ 2019-12-17 14:42:46 +01:00
consolemap.c vt/consolemap: do font sum unsigned 2021-01-07 16:17:31 +01:00
cp437.uni tty: fix up a few remaining files without SPDX identifiers 2019-04-04 18:48:43 +02:00
defkeymap.c_shipped vt: keyboard, defkeymap.c_shipped, approach the unicode table 2021-01-07 16:17:31 +01:00
defkeymap.map tty: fix up a few remaining files without SPDX identifiers 2019-04-04 18:48:43 +02:00
keyboard.c tty: drivers/tty/, stop using tty_schedule_flip() 2022-07-29 17:25:31 +02:00
Makefile kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
selection.c tty: vt: selection: Correct misspelled function sel_loadlut() 2021-05-20 17:05:33 +02:00
vc_screen.c vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF 2023-05-24 17:36:54 +01:00
vt.c vt: prevent kernel-infoleak in con_font_get() 2024-11-08 16:25:56 +01:00
vt_ioctl.c vt_ioctl: add array_index_nospec to VT_ACTIVATE 2022-02-16 12:56:33 +01:00