From: Gao Feng <fgao@xxxxxxxxxx>
The nf_log_set is an interface function, so it should do the strict sanity
check of parameters. Add one sanity check for pf, it could not exceed
NFPROTO_NUMPROTO, and print error log when pf is invalid.
Signed-off-by: Gao Feng <fgao@xxxxxxxxxx>
---
net/netfilter/nf_log.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c
index aa5847a..02ce0b9 100644
--- a/net/netfilter/nf_log.c
+++ b/net/netfilter/nf_log.c
@@ -43,8 +43,10 @@ void nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger)
{
const struct nf_logger *log;
- if (pf == NFPROTO_UNSPEC)
+ if (pf == NFPROTO_UNSPEC || pf >= NFPROTO_NUMPROTO) {
+ pr_err("Wrong pf(%d) for nf log", pf);
return;
+ }
mutex_lock(&nf_log_mutex);
log = nft_log_dereference(net->nf.nf_loggers[pf]);
--
1.9.1
--
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