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NetLabel: correct CIPSO tag handling when adding new DOI definitions 

The current netlbl_cipsov4_add_common() function has two problems which are
fixed with this patch.  The first is an off-by-one bug where it is possibile to
overflow the doi_def->tags[] array.  The second is a bug where the same
doi_def->tags[] array was not always fully initialized, which caused sporadic
failures.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Paul Moore 2007-01-05 15:08:22 -05:00 committed by David S. Miller
parent 7979512006
commit 2a2f11c227
1 changed files with 3 additions and 3 deletions
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6
net/netlabel/netlabel_cipso_v4.c
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@ -130,12 +130,12 @@ static int netlbl_cipsov4_add_common(struct genl_info *info,
nla_for_each_nested(nla, info->attrs[NLBL_CIPSOV4_A_TAGLST], nla_rem)
if (nla->nla_type == NLBL_CIPSOV4_A_TAG) {
if (iter > CIPSO_V4_TAG_MAXCNT)
if (iter >= CIPSO_V4_TAG_MAXCNT)
return -EINVAL;
doi_def->tags[iter++] = nla_get_u8(nla);
}
if (iter < CIPSO_V4_TAG_MAXCNT)
doi_def->tags[iter] = CIPSO_V4_TAG_INVALID;
while (iter < CIPSO_V4_TAG_MAXCNT)
doi_def->tags[iter++] = CIPSO_V4_TAG_INVALID;
return 0;
}