If a quota bit is set in NFACCT_FLAGS but the NFACCT_QUOTA parameter is missing then a NULL pointer dereference is triggered. CAP_NET_ADMIN is required to trigger the bug. Signed-off-by: Phil Turnbull <phil.turnbull@xxxxxxxxxx> --- net/netfilter/nfnetlink_acct.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c index 4c2b4c0..dbd0803 100644 --- a/net/netfilter/nfnetlink_acct.c +++ b/net/netfilter/nfnetlink_acct.c @@ -96,6 +96,8 @@ static int nfnl_acct_new(struct net *net, struct sock *nfnl, return -EINVAL; if (flags & NFACCT_F_OVERQUOTA) return -EINVAL; + if ((flags & NFACCT_F_QUOTA) && !tb[NFACCT_QUOTA]) + return -EINVAL; size += sizeof(u64); } -- 2.8.0 -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
