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attr: Do not enforce maximum length for NLA_FLAG attributes 

Although wasteful, NLA_FLAG with non zero payload cause no harm
and should thus not be rejected.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
This commit is contained in:
Thomas Graf 2013-03-13 17:01:54 +01:00
parent 9e6cdbf6fc
commit 60b370de8c
1 changed files with 1 additions and 3 deletions
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4
lib/attr.c
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@ -182,6 +182,7 @@ static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
[NLA_U32] = sizeof(uint32_t),
[NLA_U64] = sizeof(uint64_t),
[NLA_STRING] = 1,
[NLA_FLAG] = 0,
};
static int validate_nla(struct nlattr *nla, int maxtype,
@ -204,9 +205,6 @@ static int validate_nla(struct nlattr *nla, int maxtype,
else if (pt->type != NLA_UNSPEC)
minlen = nla_attr_minlen[pt->type];
if (pt->type == NLA_FLAG && nla_len(nla) > 0)
return -NLE_RANGE;
if (nla_len(nla) < minlen)
return -NLE_RANGE;