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restrict ports that can be accessed

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This commit is contained in:
dborca
2004-08-20 08:26:47 +00:00
parent c89df99c6e
commit b7ca0e0fa7
1 changed files with 11 additions and 58 deletions
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69
Device3Dfx/3dfx_driver.c
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@@ -585,8 +585,12 @@ static int doPIORead(pioData *desc)
if ((retval = verify_area(VERIFY_WRITE, desc->value, desc->size)))
return retval;
#if 0
/* restricted */
/* full SSTIO aperture is defined by:
* unsigned short port = desc->port;
* unsigned short base = cards[i].addr2 & ~1;
* (base <= port && port <= (base + 0x108 - desc->size))
*/
switch (desc->port) {
case VGA_INPUT_STATUS_1C:
break;
@@ -599,33 +603,6 @@ static int doPIORead(pioData *desc)
default:
return -EPERM;
}
#else
/* full range */
{
int i = desc->device;
unsigned short port = desc->port;
unsigned short base;
if (i < 0 || i >= numCards) {
/* scan for valid SSTIO aperture */
for (i = 0; i < numCards; i++) {
base = cards[i].addr2 & ~1;
if (base <= port && port <= (base + 0x107)) {
break;
}
}
if (i == numCards) {
return -EPERM;
}
} else {
/* check the given SSTIO aperture */
base = cards[i].addr2 & ~1;
if (base > port || port > (base + 0x107)) {
return -EPERM;
}
}
}
#endif
switch (desc->size) {
case 1:
@@ -653,8 +630,11 @@ static int doPIOWrite(pioData *desc)
if ((retval = verify_area(VERIFY_READ, desc->value, desc->size)))
return retval;
#if 0
/* restricted */
/* full SSTIO aperture is defined by:
* unsigned short port = desc->port;
* unsigned short base = cards[i].addr2 & ~1;
* (base <= port && port <= (base + 0x108 - desc->size))
*/
switch (desc->port) {
case SC_INDEX:
break;
@@ -665,33 +645,6 @@ static int doPIOWrite(pioData *desc)
default:
return -EPERM;
}
#else
/* full range */
{
int i = desc->device;
unsigned short port = desc->port;
unsigned short base;
if (i < 0 || i >= numCards) {
/* scan for valid SSTIO aperture */
for (i = 0; i < numCards; i++) {
base = cards[i].addr2 & ~1;
if (base <= port && port <= (base + 0x107)) {
break;
}
}
if (i == numCards) {
return -EPERM;
}
} else {
/* check the given SSTIO aperture */
base = cards[i].addr2 & ~1;
if (base > port || port > (base + 0x107)) {
return -EPERM;
}
}
}
#endif
copy_from_user(&retchar, desc->value, desc->size);
switch (desc->size) {