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Antonino A. Daplas e400b6ec4e vt/vgacon: Check if screen resize request comes from userspace 
Various console drivers are able to resize the screen via the con_resize()
hook.  This hook is also visible in userspace via the TIOCWINSZ, VT_RESIZE and
VT_RESIZEX ioctl's.  One particular utility, SVGATextMode, expects that
con_resize() of the VGA console will always return success even if the
resulting screen is not compatible with the hardware.  However, this
particular behavior of the VGA console, as reported in Kernel Bugzilla Bug
7513, can cause undefined behavior if the user starts with a console size
larger than 80x25.

To work around this problem, add an extra parameter to con_resize().  This
parameter is ignored by drivers except for vgacon.  If this parameter is
non-zero, then the resize request came from a VT_RESIZE or VT_RESIZEX ioctl
and vgacon will always return success.  If this parameter is zero, vgacon will
return -EINVAL if the requested size is not compatible with the hardware.  The
latter is the more correct behavior.

With this change, SVGATextMode should still work correctly while in-kernel and
stty resize calls can expect correct behavior from vgacon.

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2007-10-16 09:43:20 -07:00
..
aty Radeonfb Xpress 200M RC410 support 2007-10-16 09:43:19 -07:00
backlight fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
console vt/vgacon: Check if screen resize request comes from userspace 2007-10-16 09:43:20 -07:00
display make drivers/video/display/display-sysfs.c:display_class static 2007-05-08 11:15:26 -07:00
geode drivers/video/geode/lxfb_core.c: fix lxfb_setup warning 2007-10-16 09:43:15 -07:00
i810 i810fb: the pseudo_palette is only 16 elements long 2007-07-17 10:23:12 -07:00
intelfb Intel FB: more interlaced mode support 2007-10-16 09:43:20 -07:00
kyro fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
logo Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 2007-07-19 14:28:19 -07:00
matrox fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
mbx mbxfb: Improvements and new features 2007-10-16 09:43:14 -07:00
nvidia nvidiafb: Add boot option to reverse i2c port assignment 2007-10-16 09:43:19 -07:00
omap OMAP: LCD panel support for the Siemens SX1 mobile phone 2007-07-17 10:23:15 -07:00
pnx4008 fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
riva Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight 2007-07-22 11:19:46 -07:00
savage fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
sis fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
vermilion fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
68328fb.c 68328fb: the pseudo_palette is only 16 elements long 2007-07-17 10:23:11 -07:00
Kconfig video gfx: fix menu ordering 2007-10-16 09:43:20 -07:00
Makefile uvesafb: the driver core 2007-10-16 09:43:13 -07:00
acornfb.c Remove the arm26 port 2007-07-31 15:39:39 -07:00
acornfb.h
…
amba-clcd.c some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
amifb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
arcfb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
arkfb.c vt8623fb: arkfb: null pointer dereference fix 2007-06-01 08:18:28 -07:00
asiliantfb.c [PATCH] vt: Remove VT-specific declarations and definitions from tty.h 2006-07-10 13:24:16 -07:00
atafb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
atafb.h m68k: Atari fb revival 2007-05-04 17:59:05 -07:00
atafb_iplan2p2.c m68k: Atari fb revival 2007-05-04 17:59:05 -07:00
atafb_iplan2p4.c m68k: Atari fb revival 2007-05-04 17:59:05 -07:00
atafb_iplan2p8.c m68k: Atari fb revival 2007-05-04 17:59:05 -07:00
atafb_mfb.c m68k: Atari fb revival 2007-05-04 17:59:05 -07:00
atafb_utils.h m68k: Atari fb revival 2007-05-04 17:59:05 -07:00
atmel_lcdfb.c atmel_lcdfb: use spare bits in 32bpp mode as alpha channel 2007-07-21 17:49:17 -07:00
au1100fb.c au1100fb: move au1100fb_fb_blank() beforce au1100fb_setmode() 2007-08-22 19:52:47 -07:00
au1100fb.h [PATCH] au11oofb: fix to remove flickering 2006-12-08 08:29:06 -08:00
au1200fb.c some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
au1200fb.h [PATCH] au1200fb: Alchemy Au1200 framebuffer driver 2006-03-27 08:44:55 -08:00
bt431.h
…
bt455.h
…
bw2.c [VIDEO]: Do not prom_halt() in cg3 and bw2 device probe. 2007-08-26 18:49:08 -07:00
c2p.c
…
c2p.h
…
cfbcopyarea.c fbdev: Support for byte-reversed framebuffer formats 2007-10-16 09:43:19 -07:00
cfbfillrect.c fbdev: Support for byte-reversed framebuffer formats 2007-10-16 09:43:19 -07:00
cfbimgblt.c fbdev: Support for byte-reversed framebuffer formats 2007-10-16 09:43:19 -07:00
cg3.c [VIDEO]: Do not prom_halt() in cg3 and bw2 device probe. 2007-08-26 18:49:08 -07:00
cg6.c [CG6]: accelerated copyarea 2007-10-13 21:53:08 -07:00
cg14.c [VIDEO]: Fix OOPS in all SBUS framebuffer drivers. 2007-07-30 00:27:33 -07:00
chipsfb.c chipsfb: use correct pm state 2007-07-26 11:35:18 -07:00
cirrusfb.c cirrusfb: code improvement 2nd part 2007-10-16 09:43:18 -07:00
clps711xfb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
controlfb.c controlfb: the pseudo_palette is only 16 elements long 2007-07-17 10:23:11 -07:00
controlfb.h
…
cyber2000fb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
cyber2000fb.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
cyblafb.c cyblafb: fix pseudo_palette array overrun in setcolreg 2007-07-17 10:23:12 -07:00
dnfb.c [PATCH] vt: Remove VT-specific declarations and definitions from tty.h 2006-07-10 13:24:16 -07:00
edid.h
…
epson1355fb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
fb_ddc.c Fix generic fb_ddc i2c edid probe msg 2006-11-16 22:18:28 -08:00
fb_defio.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
fb_draw.h fbdev: Support for byte-reversed framebuffer formats 2007-10-16 09:43:19 -07:00
fb_notify.c [PATCH] fbdev: statically link the framebuffer notification functions 2006-07-31 13:28:44 -07:00
fb_sys_fops.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
fbcmap.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
fbcvt.c [PATCH] various fbdev files: mark structs and array read-only 2006-12-08 08:29:05 -08:00
fbmem.c unexport fb_prepare_logo 2007-10-16 09:43:15 -07:00
fbmon.c fbdev: fb_create_modedb() non-static `int first = 1;' 2007-10-16 09:43:15 -07:00
fbsysfs.c fbdev: fix obvious bug in show_pan() 2007-05-08 11:15:26 -07:00
ffb.c [FFB]: source cleanup 2007-10-13 21:53:08 -07:00
fm2fb.c fm2fb: the pseudo_palette is only 16 elements long 2007-07-17 10:23:12 -07:00
g364fb.c PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
gbefb.c gbefb: the pseudo_palette is only 16 elements long 2007-07-17 10:23:12 -07:00
gxt4500.c [PATCH] gxt4500: Fix colormap and PLL setting, support GXT6000P 2006-12-22 08:55:50 -08:00
hecubafb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
hgafb.c [PATCH] vt: Remove VT-specific declarations and definitions from tty.h 2006-07-10 13:24:16 -07:00
hitfb.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
hpfb.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
igafb.c [SPARC]: Fix serial console device detection. 2007-07-20 16:59:26 -07:00
imacfb.c drivers/firmware: const-ify DMI API and internals 2007-10-09 20:22:20 -04:00
imsttfb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
imxfb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
imxfb.h
…
leo.c [VIDEO]: Fix OOPS in all SBUS framebuffer drivers. 2007-07-30 00:27:33 -07:00
macfb.c macfb: fix pseudo_palette size and overrun 2007-07-17 10:23:12 -07:00
macmodes.c drivers/video/macmodes.c:mac_find_mode() mustn't be __devinit 2007-07-17 10:23:13 -07:00
macmodes.h drivers/video/macmodes.c:mac_find_mode() mustn't be __devinit 2007-07-17 10:23:13 -07:00
maxinefb.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
modedb.c fbdev: find mode with the highest/safest refresh rate in fb_find_mode() 2007-10-16 09:43:18 -07:00
neofb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
offb.c offb: the pseudo_palette is only 16 elements long 2007-07-17 10:23:12 -07:00
output.c Convert from class_device to device for drivers/video 2007-10-12 14:51:04 -07:00
p9100.c [VIDEO]: Fix OOPS in all SBUS framebuffer drivers. 2007-07-30 00:27:33 -07:00
platinumfb.c [POWERPC] Fix platinumfb framebuffer 2007-09-22 14:49:22 +10:00
platinumfb.h
…
pm2fb.c pm2fb: replace busy waiting with cpu_relax 2007-10-16 09:43:19 -07:00
pm3fb.c pm3fb: replace busy waiting with cpu_relax 2007-10-16 09:43:19 -07:00
pmag-aa-fb.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
pmag-ba-fb.c drivers/video/pmag-ba-fb.c: improve diagnostics 2007-10-16 09:43:19 -07:00
pmagb-b-fb.c [TC] pmagb-b-fb: Convert to the driver model 2007-02-09 16:23:18 +00:00
ps3fb.c ps3fb: Fix spurious mode change failures 2007-10-16 09:43:19 -07:00
pvr2fb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
pxafb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
pxafb.h pxafb: Add support for other palette formats 2007-10-16 09:43:15 -07:00
q40fb.c q40fb: the pseudo_palette is only 16 elements long 2007-07-17 10:23:12 -07:00
s1d13xxxfb.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
s3c2410fb.c s3c2410fb: make use of default_display settings 2007-10-16 09:43:18 -07:00
s3c2410fb.h s3c2410fb: source code improvements 2007-10-16 09:43:18 -07:00
s3fb.c svgalib: move fb_get_caps to svgalib 2007-05-09 12:30:57 -07:00
sa1100fb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
sa1100fb.h [PATCH] Replace regular code with appropriate calls to container_of() 2007-02-11 11:18:06 -08:00
sbuslib.c [SPARC]: Mark SBUS framebuffer ioctls as IGNORE in compat_ioctl.c 2007-07-30 00:27:36 -07:00
sbuslib.h [SPARC]: Fix sbusfb build. 2006-01-17 15:53:11 -08:00
sgivwfb.c sgivwfb: the pseudo_palette is only 16 elements long 2007-07-17 10:23:12 -07:00
skeletonfb.c skeletonfb: wrong field name fix 2007-10-16 09:43:14 -07:00
sm501fb.c sm501fb: Ensure panel interface is not tristated when setup 2007-10-16 09:43:14 -07:00
sstfb.c fbdev: change asm/uaccess.h to linux/uaccess.h 2007-10-16 09:43:17 -07:00
sticore.h [PARISC] Fix stifb with IOREMAP and a 64-bit kernel 2006-03-30 17:48:47 +00:00
stifb.c stifb: detect cards in double buffer mode more reliably 2007-08-11 15:47:40 -07:00
sunxvr500.c [VIDEO] sunxvr500fb: Fix pseudo_palette array size 2007-06-05 13:15:26 -07:00
sunxvr2500.c [VIDEO] sunxvr2500fb: Fix pseudo_palette array size 2007-06-05 13:15:01 -07:00
svgalib.c svgalib: move fb_get_caps to svgalib 2007-05-09 12:30:57 -07:00
syscopyarea.c fbdev: consolidate common drawing functions into a header file 2007-05-08 11:15:30 -07:00
sysfillrect.c fbdev: consolidate common drawing functions into a header file 2007-05-08 11:15:30 -07:00
sysimgblt.c fbdev: add drawing functions for framebuffers in system RAM 2007-05-08 11:15:30 -07:00
tcx.c [VIDEO]: Fix OOPS in all SBUS framebuffer drivers. 2007-07-30 00:27:33 -07:00
tdfxfb.c tdfxfb: checkpatch fixes 2007-10-16 09:43:19 -07:00
tgafb.c drivers/ misc __iomem annotations 2007-07-26 11:11:57 -07:00
tridentfb.c tridentfb: coding style improvement 2007-10-16 09:43:15 -07:00
uvesafb.c uvesafb: the driver core 2007-10-16 09:43:13 -07:00
valkyriefb.c some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
valkyriefb.h
…
vesafb.c [PATCH] annotate some variables in vesafb driver as __read_mostly 2006-12-08 08:29:06 -08:00
vfb.c vfb: make virtual framebuffer mmapable 2007-10-16 09:43:18 -07:00
vga16fb.c vga16fb: actually support widths in multiples of 8 2007-05-08 11:15:33 -07:00
vgastate.c vga: vgastate fix 2007-05-08 11:15:32 -07:00
vt8623fb.c vt8623fb.c: make code static 2007-07-17 10:23:13 -07:00
w100fb.c w100fb: fix compile warnings 2007-05-23 20:14:13 -07:00
w100fb.h [PATCH] w100fb: Add acceleration support to ATI Imageon 2006-03-31 12:19:00 -08:00
xilinxfb.c XilinxFB: typo bugfix 2007-10-14 08:56:33 -07:00