Zheyu Ma 5e0da18956 video: fbdev: s3fb: Check the size of screen before memset_io() ... [ Upstream commit 6ba592fa014f21f35a8ee8da4ca7b95a018f13e8 ] In the function s3fb_set_par(), the value of 'screen_size' is calculated by the user input. If the user provides the improper value, the value of 'screen_size' may larger than 'info->screen_size', which may cause the following bug: [ 54.083733] BUG: unable to handle page fault for address: ffffc90003000000 [ 54.083742] #PF: supervisor write access in kernel mode [ 54.083744] #PF: error_code(0x0002) - not-present page [ 54.083760] RIP: 0010:memset_orig+0x33/0xb0 [ 54.083782] Call Trace: [ 54.083788] s3fb_set_par+0x1ec6/0x4040 [ 54.083806] fb_set_var+0x604/0xeb0 [ 54.083836] do_fb_ioctl+0x234/0x670 Fix the this by checking the value of 'screen_size' before memset_io(). Fixes: a268422de8 ("fbdev driver for S3 Trio/Virge") Signed-off-by: Zheyu Ma <zheyuma97@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-08-21 15:16:13 +02:00
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backlight	backlight: qcom-wled: Respect enabled-strings in set_brightness	2022-01-27 10:53:59 +01:00
console	parisc/stifb: Fix fb_is_primary_device() only available with CONFIG_FB_STI	2022-06-29 08:59:53 +02:00
fbdev	video: fbdev: s3fb: Check the size of screen before memset_io()	2022-08-21 15:16:13 +02:00
logo	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
Kconfig	…
Makefile	…
display_timing.c	…
hdmi.c	drm-misc-next for v5.9:	2020-06-24 15:45:51 +10:00
of_display_timing.c	…
of_videomode.c	…
vgastate.c	…
videomode.c	…