linux-stable/drivers/video
Shigeru Yoshida a5a923038d fbdev: fbcon: Properly revert changes when vc_resize() failed
fbcon_do_set_font() calls vc_resize() when font size is changed.
However, if if vc_resize() failed, current implementation doesn't
revert changes for font size, and this causes inconsistent state.

syzbot reported unable to handle page fault due to this issue [1].
syzbot's repro uses fault injection which cause failure for memory
allocation, so vc_resize() failed.

This patch fixes this issue by properly revert changes for font
related date when vc_resize() failed.

Link: https://syzkaller.appspot.com/bug?id=3443d3a1fa6d964dd7310a0cb1696d165a3e07c4 [1]
Reported-by: syzbot+a168dbeaaa7778273c1b@syzkaller.appspotmail.com
Signed-off-by: Shigeru Yoshida <syoshida@redhat.com>
Signed-off-by: Helge Deller <deller@gmx.de>
CC: stable@vger.kernel.org # 5.15+
2022-08-26 19:56:18 +02:00
..
backlight - Core Frameworks 2022-08-06 10:33:34 -07:00
console fbdev: Move fbdev drivers from strlcpy to strscpy 2022-08-24 22:06:15 +02:00
fbdev fbdev: fbcon: Properly revert changes when vc_resize() failed 2022-08-26 19:56:18 +02:00
logo
aperture.c drm: Implement DRM aperture helpers under video/ 2022-06-27 11:07:55 +02:00
display_timing.c
hdmi.c
Kconfig drm: Implement DRM aperture helpers under video/ 2022-06-27 11:07:55 +02:00
Makefile drm: Implement DRM aperture helpers under video/ 2022-06-27 11:07:55 +02:00
of_display_timing.c video: fbdev: of: display_timing: Remove a redundant zeroing of memory 2022-04-04 08:55:23 +02:00
of_videomode.c
vgastate.c
videomode.c