From 8a61fadb3908454ccfa538aaa75eb1d22def5700 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Tue, 9 Aug 2005 20:23:53 -0700 Subject: [NETFILTER]: check nf_log function call arguments Check whether pf is too large in order to prevent array overflow. Signed-off-by: Harald Welte Signed-off-by: David S. Miller --- net/netfilter/nf_log.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'net/netfilter') diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c index e104760f7a6..573e76a770d 100644 --- a/net/netfilter/nf_log.c +++ b/net/netfilter/nf_log.c @@ -24,6 +24,9 @@ int nf_log_register(int pf, struct nf_logger *logger) { int ret = -EBUSY; + if (pf >= NPROTO) + return -EINVAL; + /* Any setup of logging members must be done before * substituting pointer. */ spin_lock(&nf_log_lock); @@ -38,14 +41,19 @@ int nf_log_register(int pf, struct nf_logger *logger) } EXPORT_SYMBOL(nf_log_register); -void nf_log_unregister_pf(int pf) +int nf_log_unregister_pf(int pf) { + if (pf >= NPROTO) + return -EINVAL; + spin_lock(&nf_log_lock); nf_logging[pf] = NULL; spin_unlock(&nf_log_lock); /* Give time to concurrent readers. */ synchronize_net(); + + return 0; } EXPORT_SYMBOL(nf_log_unregister_pf); -- cgit v1.2.3-18-g5258