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neofb: avoid overwriting fb_info fields

Browse source 
Fix bug identified by Marcio Buss in
http://bugzilla.kernel.org/show_bug.cgi?id=9565 - neofb can overwrite a field
in the fb_info struct.

This fix will result in truncated device identification strings - perhaps
fb_innfo.fix.id can be made larger?

Cc: Marcio Buss <[email protected]>
Cc: "Antonino A. Daplas" <[email protected]>
Cc: Christian Trefzer <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andrew Morton 2008-02-06 01:39:15 -08:00 • committed by Linus Torvalds
commit 0e9045494a
1 changed files with 18 additions and 9 deletions
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27
drivers/video/neofb.c
View file

@ -2066,40 +2066,49 @@ static struct fb_info *__devinit neo_alloc_fb_info(struct pci_dev *dev, const st
switch (info->fix.accel) {
case FB_ACCEL_NEOMAGIC_NM2070:
sprintf(info->fix.id, "MagicGraph 128");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 128");
break;
case FB_ACCEL_NEOMAGIC_NM2090:
sprintf(info->fix.id, "MagicGraph 128V");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 128V");
break;
case FB_ACCEL_NEOMAGIC_NM2093:
sprintf(info->fix.id, "MagicGraph 128ZV");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 128ZV");
break;
case FB_ACCEL_NEOMAGIC_NM2097:
sprintf(info->fix.id, "MagicGraph 128ZV+");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 128ZV+");
break;
case FB_ACCEL_NEOMAGIC_NM2160:
sprintf(info->fix.id, "MagicGraph 128XD");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 128XD");
break;
case FB_ACCEL_NEOMAGIC_NM2200:
sprintf(info->fix.id, "MagicGraph 256AV");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 256AV");
info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
FBINFO_HWACCEL_COPYAREA |
FBINFO_HWACCEL_FILLRECT;
break;
case FB_ACCEL_NEOMAGIC_NM2230:
sprintf(info->fix.id, "MagicGraph 256AV+");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 256AV+");
info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
FBINFO_HWACCEL_COPYAREA |
FBINFO_HWACCEL_FILLRECT;
break;
case FB_ACCEL_NEOMAGIC_NM2360:
sprintf(info->fix.id, "MagicGraph 256ZX");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 256ZX");
info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
FBINFO_HWACCEL_COPYAREA |
FBINFO_HWACCEL_FILLRECT;
break;
case FB_ACCEL_NEOMAGIC_NM2380:
sprintf(info->fix.id, "MagicGraph 256XL+");
snprintf(info->fix.id, sizeof(info->fix.id),
"MagicGraph 256XL+");
info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
FBINFO_HWACCEL_COPYAREA |
FBINFO_HWACCEL_FILLRECT;