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TOMOYO: Support longer pathname.

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Allow pathnames longer than 4000 bytes.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa
2010-06-03 20:36:43 +09:00
committed by James Morris
vanhempi 9b244373da
commit c8c57e8427
6 muutettua tiedostoa jossa 214 lisäystä ja 324 poistoa
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55
security/tomoyo/mount.c
Näytä tiedosto

@@ -24,57 +24,6 @@
/* Allow to call 'mount --make-shared /dir' */
#define TOMOYO_MOUNT_MAKE_SHARED_KEYWORD "--make-shared"
/**
* tomoyo_encode2: Encode binary string to ascii string.
*
* @str: String in binary format.
*
* Returns pointer to @str in ascii format on success, NULL otherwise.
*
* This function uses kzalloc(), so caller must kfree() if this function
* didn't return NULL.
*/
static char *tomoyo_encode2(const char *str)
{
int len = 0;
const char *p = str;
char *cp;
char *cp0;
if (!p)
return NULL;
while (*p) {
const unsigned char c = *p++;
if (c == '\\')
len += 2;
else if (c > ' ' && c < 127)
len++;
else
len += 4;
}
len++;
/* Reserve space for appending "/". */
cp = kzalloc(len + 10, GFP_NOFS);
if (!cp)
return NULL;
cp0 = cp;
p = str;
while (*p) {
const unsigned char c = *p++;
if (c == '\\') {
*cp++ = '\\';
*cp++ = '\\';
} else if (c > ' ' && c < 127) {
*cp++ = c;
} else {
*cp++ = '\\';
*cp++ = (c >> 6) + '0';
*cp++ = ((c >> 3) & 7) + '0';
*cp++ = (c & 7) + '0';
}
}
return cp0;
}
/**
* tomoyo_mount_acl2 - Check permission for mount() operation.
*
@@ -104,7 +53,7 @@ static int tomoyo_mount_acl2(struct tomoyo_request_info *r, char *dev_name,
int error = -ENOMEM;
/* Get fstype. */
requested_type = tomoyo_encode2(type);
requested_type = tomoyo_encode(type);
if (!requested_type)
goto out;
rtype.name = requested_type;
@@ -155,7 +104,7 @@ static int tomoyo_mount_acl2(struct tomoyo_request_info *r, char *dev_name,
/* Map dev_name to "<NULL>" if no dev_name given. */
if (!dev_name)
dev_name = "<NULL>";
requested_dev_name = tomoyo_encode2(dev_name);
requested_dev_name = tomoyo_encode(dev_name);
if (!requested_dev_name) {
error = -ENOMEM;
goto out;