3.16.7-ckt12 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Patrick McHardy <[email protected]> commit 9889840f5988ecfd43b00c9abb83c1804e21406b upstream. Check that the space required for the expressions doesn't exceed the size of the dlen field, which would lead to the iterators crashing. Signed-off-by: Patrick McHardy <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]> Signed-off-by: Luis Henriques <[email protected]> --- net/netfilter/nf_tables_api.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index e8624c751ec6..41abb8281a4c 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -1794,6 +1794,10 @@ static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb, n++; } } + /* Check for overflow of dlen field */ + err = -EFBIG; + if (size >= 1 << 12) + goto err1; if (nla[NFTA_RULE_USERDATA]) ulen = nla_len(nla[NFTA_RULE_USERDATA]); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
