netfilter: nfnetlink_queue: use y2038 safe timestamp

The __build_packet_message function fills a nfulnl_msg_packet_timestamp
structure that uses 64-bit seconds and is therefore y2038 safe, but
it uses an intermediate 'struct timespec' which is not.

This trivially changes the code to use 'struct timespec64' instead,
to correct the result on 32-bit architectures.

This is a copy and paste of Arnd's original patch for nfnetlink_log.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index b1f1c747d518e0df0ec67e3b89f7509d760ee299..0d2e856dbbf202aa4625dcf72e6005ed2ad99267 100644 (file)
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -500,9 +500,10 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
 
        if (entskb->tstamp.tv64) {
                struct nfqnl_msg_packet_timestamp ts;
-               struct timeval tv = ktime_to_timeval(entskb->tstamp);
-               ts.sec = cpu_to_be64(tv.tv_sec);
-               ts.usec = cpu_to_be64(tv.tv_usec);
+               struct timespec64 kts = ktime_to_timespec64(skb->tstamp);
+
+               ts.sec = cpu_to_be64(kts.tv_sec);
+               ts.usec = cpu_to_be64(kts.tv_nsec / NSEC_PER_USEC);
 
                if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts))
                        goto nla_put_failure;