net: annotate inet_timewait_sock bitfields

The use of bitfields here would lead to false positive warnings with
kmemcheck. Silence them.

(Additionally, one erroneous comment related to the bitfield was also
fixed.)

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>

2 files changed, 7 insertions, 1 deletions

diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index 4b8ece22b8e9..b63b80fac567 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h
@@ -16,6 +16,7 @@
 #define _INET_TIMEWAIT_SOCK_
 
 
+#include <linux/kmemcheck.h>
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/timer.h>
@@ -127,10 +128,12 @@ struct inet_timewait_sock {
         __be32                  tw_rcv_saddr;
         __be16                  tw_dport;
         __u16                   tw_num;
+        kmemcheck_bitfield_begin(flags);
         /* And these are ours. */
         __u8                    tw_ipv6only:1,
                                 tw_transparent:1;
-        /* 15 bits hole, try to pack */
+        /* 14 bits hole, try to pack */
+        kmemcheck_bitfield_end(flags);
         __u16                   tw_ipv6_offset;
         unsigned long           tw_ttd;
         struct inet_bind_bucket *tw_tb;
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index 8554d0ea1719..03169fc84877 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/kmemcheck.h>
 #include <net/inet_hashtables.h>
 #include <net/inet_timewait_sock.h>
 #include <net/ip.h>
@@ -117,6 +118,8 @@ struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk, const int stat
         if (tw != NULL) {
                 const struct inet_sock *inet = inet_sk(sk);
 
+                kmemcheck_annotate_bitfield(tw, flags);
+
                 /* Give us an identity. */
                 tw->tw_daddr        = inet->daddr;
                 tw->tw_rcv_saddr    = inet->rcv_saddr;