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[NetLabel]: Verify sensitivity level has a valid CIPSO mapping 

The current CIPSO engine has a problem where it does not verify that
the given sensitivity level has a valid CIPSO mapping when the "std"
CIPSO DOI type is used.  The end result is that bad packets are sent
on the wire which should have never been sent in the first place.
This patch corrects this problem by verifying the sensitivity level
mapping similar to what is done with the category mapping.  This patch
also changes the returned error code in this case to -EPERM to better
match what the category mapping verification code returns.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Moore 2007-03-02 13:19:02 -08:00 committed by David S. Miller
parent 90719dbeaf
commit c6387a8694
1 changed files with 4 additions and 3 deletions
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7
net/ipv4/cipso_ipv4.c
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@ -732,11 +732,12 @@ static int cipso_v4_map_lvl_hton(const struct cipso_v4_doi *doi_def,
*net_lvl = host_lvl;
return 0;
case CIPSO_V4_MAP_STD:
if (host_lvl < doi_def->map.std->lvl.local_size) {
if (host_lvl < doi_def->map.std->lvl.local_size &&
doi_def->map.std->lvl.local[host_lvl] < CIPSO_V4_INV_LVL) {
*net_lvl = doi_def->map.std->lvl.local[host_lvl];
return 0;
}
break;
return -EPERM;
}
return -EINVAL;
@ -771,7 +772,7 @@ static int cipso_v4_map_lvl_ntoh(const struct cipso_v4_doi *doi_def,
*host_lvl = doi_def->map.std->lvl.cipso[net_lvl];
return 0;
}
break;
return -EPERM;
}
return -EINVAL;